View source for Standard electrode potential (data page)

{{Short description|Data values of standard electrode potential}}
{{Use American English|date = April 2019}}
{{Main|Standard electrode potential}}

The '''data below''' tabulates [[standard electrode potential]]s (''E''°), in [[volt]]s relative to the [[standard hydrogen electrode]] (SHE), at:
* [[Temperature]] {{cvt|298.15|K}};
* [[Activity (chemistry)|Effective concentration]] (activity) 1&nbsp;(dimensionless) for each aqueous or [[Amalgam (chemistry)|amalgamated]] (mercury-alloyed) species;
* Unit [[activity (chemistry)|activity]] for each solvent and pure solid or liquid species; and
* [[Fugacity|Absolute partial pressure]] {{cvt|101.325|kPa|atm bar}} for each gaseous reagent&nbsp;&mdash; the convention in most literature data but not the current [[standard state]] (100&nbsp;kPa).
Variations from these ideal conditions affect measured voltage via the [[Nernst equation]].

Electrode potentials of successive elementary half-reactions cannot be directly added.  However, the corresponding [[Gibbs free energy]] changes (∆''G''°) can be added.  Those free energy changes satisfy
:{{Nowrap|∆''G''° {{=}} –{{mvar|z}}''FE''°}},
where {{mvar|z}} electrons are transferred, and the [[Faraday constant]] {{mvar|F}} is the [[conversion factor]] describing [[Coulomb]]s transferred per mole electrons.  For example, from 
:{{Nowrap|Fe{{2+}} + 2{{e-}} {{eqm}} Fe(''s'') (−0.44 V)}}, 
the energy to form one neutral atom of Fe(''s'') from one Fe{{2+}} ion and two electrons is {{Nowrap|2 × 0.44 eV {{=}} 0.88 eV,}} or 84 907 J/(mol {{e-}}). That value is also the [[standard Gibbs free energy of formation|standard formation energy]] (∆''G''<sub>f</sub>°) for an Fe{{2+}} ion, since {{e-}} and Fe(''s'') both have zero formation energy.

Data from different sources may cause table inconsistencies. For example: <math chem display=block>\begin{alignat}{4}
&\ce{Cu+ + e-} &{}\rightleftharpoons{}&\ce{Cu(s)}&\quad\quad E_1=+0.520\text{ V} \\
&\ce{Cu^2+ + 2e-}&{}\rightleftharpoons{}&\ce{Cu(s)}  &\quad\quad E_2=+0.337\text{ V} \\
&\ce{Cu^2+ + e-}&{}\rightleftharpoons{}&\ce{Cu+}  &\quad\quad E_3=+0.159\text{ V}
\end{alignat}</math> From additivity of Gibbs energies and canceling common factors, one must have <math display=block>2\cdot E_2=1\cdot E_1+1\cdot E_3</math>  But that equation does not hold exactly with the cited values.

__TOC__

==Table of standard electrode potentials==
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'''Legend:''' (''s'') – solid; (''l'') – liquid; (''g'') – gas; (''aq'') – aqueous (default for all charged species); (''Hg'') – amalgam; bold – water electrolysis equations.
{|class="sortable wikitable"
|-
! rowspan="2" | Element
!colspan="3" class="unsortable"| [[Half-reaction]]
! rowspan="2" | ''E°''<br />(volt)
! rowspan="2" |Electrons<br />transferred
! class="unsortable noprint" rowspan="2"|Reference
|-
! Oxidant
! class="unsortable" | ⇌
! Reductant
|-
|Sr
|{{chem|[[Strontium|Sr]]|+}} + {{e-}}
|⇌
|Sr(''s'')
| −4.101
|1
|<!-- Estimated? --><ref name="CRC">{{RubberBible87th}}</ref>
|-
| Ca
| {{chem|[[Calcium|Ca]]|+}} + {{e-}}
|⇌
| Ca(''s'')
| −3.8
|1
|class="noprint"|<!-- Estimated? --><ref name="CRC" />
|-
| Th
| {{chem|link=Thorium|Th|4+}} + {{e-}}
|⇌
| {{chem|Th|3+}}
| −3.6
|1
|class="noprint"|<!-- Estimated?  OTOH, Greenwood & Earnshaw doesn't appear to cite any sources for this data.  OTOH, this spot in the table is blank in the first edition.   --><ref
name=Greenwood1263>Greenwood and Earnshaw, p. 1263</ref>
|-
| Pr
| {{chem|link=Praseodymium|Pr|3+}} + {{e-}}
|⇌
| {{chem|Pr|2+}}
| −3.1
|1
|class="noprint"|Estimated<ref name="VanSrc" />
|-
| N
| 3{{chem|link=Nitrogen|N|2}}(''g'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| 2{{chem|link=Hydrogen azide|HN|3}}(''aq'')
| −3.09
|2
|class="noprint"|<ref name=Gre/><ref name=van92/>
|-
| Li
| {{chem|link=Lithium|Li|+}} + {{e-}}
|⇌
| Li(''s'')
| −3.0401
|1
|class="noprint"|<ref name=van92/><ref name=AS5 />{{rp|153}}
|-
| N
| {{chem|link=Nitrogen gas|N|2}}(''g'') + 4{{H2O-nl}} + 2{{e-}}
|⇌
| 2{{chem|link=Hydroxylamine|NH|2|OH}}(''aq'') + 2{{OH-|nolink=y}}
| −3.04
|2
|class="noprint"|<ref name=Gre/>
|-
| Cs
| {{chem|link=Caesium|Cs|+}} + {{e-}}
|⇌
| Cs(''s'')
| −3.026
|1
|class="noprint"|<ref name=van92/>
|-
| Ca
| {{chem|link=Calcium hydroxide|Ca(OH)|2}} + 2{{e-}}
|⇌
| [[Calcium|Ca]](''s'') + 2{{OH-|nolink=y}}
| −3.02
|2
|class="noprint"|<ref name="CRC" />
|-
| Er
| {{chem|link=Erbium|Er|3+}} + {{e-}}
|⇌
| {{chem|Er|2+}}
| −3
|1
|class="noprint"|<ref name="CRC" />
|-
| Ba
| {{chem|link=Barium hydroxide|Ba(OH)|2}} + 2{{e-}}
|⇌
| [[Barium|Ba]](''s'') + 2{{OH-|nolink=y}}
| −2.99
|2
|class="noprint"|<ref name="CRC" />
|-
| Rb
| {{chem|link=Rubidium|Rb|+}} + {{e-}}
|⇌
| Rb(''s'')
| −2.98
|1
|class="noprint"|<ref name=van92/>
|-
| K
| {{chem|link=Potassium|K|+}} + {{e-}}
|⇌
| K(''s'')
| −2.931
|1
|class="noprint"|<ref name=van92/>
|-
| Ba
| {{chem|link=Barium|Ba|2+}} + 2{{e-}}
|⇌
| Ba(''s'')
| −2.912
|2
|class="noprint"|<ref name=van92/>
|-
| La
| [[Lanthanum hydroxide|{{chem|La(OH)|3}}]](''s'') + 3{{e-}}
|⇌
| La(''s'') + 3{{OH-|nolink=y}}
| −2.9
|3
|class="noprint"|<ref name=van92/>
|-
| Fr
| {{chem|link=Francium|Fr|+}} + {{e-}}
|⇌
| Fr(''s'')
| −2.9
|1
|class="noprint"|<ref name="CRC" />
|-
| Sr
| {{chem|link=Strontium|Sr|2+}} + 2{{e-}}
|⇌
| Sr(''s'')
| −2.899
|2
|class="noprint"|<ref name=van92/>
|-
| Sr
| {{Chem|link=Strontium hydroxide|Sr(OH)|2}} + 2{{e-}}
|⇌
| Sr(''s'') + 2{{OH-|nolink=y}}
| −2.88
|2
|class="noprint"|<ref name="CRC" />
|-
| Ca
| {{Chem|link=Calcium|Ca|2+}} + 2{{e-}}
|⇌
| Ca(''s'')
| −2.868
|2
|class="noprint"|<ref name=van92/><ref name=AS5 />{{rp|153}}
|-
| Li
| {{Chem|Li|+}} + {{Chem|C|6}}(''s'') + {{e-}}
|⇌
| {{Chem|link=Lithium-ion_battery#Electrochemistry|LiC|6}}(''s'')
| −2.84
|1
|class="noprint"|<ref name=van92/>
|-
| Eu
| {{Chem|link=Europium|Eu|2+}} + 2{{e-}}
|⇌
| Eu(''s'')
| −2.812
|2
|class="noprint"|<ref name=van92/>
|-
| Ra
| {{Chem|link=Radium|Ra|2+}} + 2{{e-}}
|⇌
| Ra(''s'')
| −2.8
|2
|class="noprint"|<ref name=van92/>
|-
| Ho
| {{chem|link=Holmium|Ho|3+}} + {{e-}}
|⇌
| Ho{{2+}}
| −2.8
|1
|class="noprint"|<ref name="CRC" />
|-
| Bk
| {{chem|link=Berkelium|Bk|3+}} + {{e-}}
|⇌
| {{Chem|Bk|2+}}
| −2.8
|1
|class="noprint"|<ref name="CRC" />
|-
| Yb
| {{Chem|link=Ytterbium|Yb|2+}} + 2{{e-}}
|⇌
| Yb(''s'')
| −2.76
|2
|class="noprint"|<ref name="CRC" />
|-
| Na
| {{Chem|link=Sodium|Na|+}} + {{e-}}
|⇌
| Na(''s'')
| −2.71
|1
|class="noprint"|<ref name=van92/><ref name=Atk/>
|-
| Mg
| {{Chem|link=Magnesium|Mg|+}} + {{e-}}
|⇌
| Mg(''s'')
| −2.7
|1
|class="noprint"|<ref name="CRC" />
|-
| Nd
| {{chem|link=Neodymium|Nd|3+}} + {{e-}}
|⇌
| {{Chem|Nd|2+}}
| −2.7
|1
|class="noprint"|<ref name="CRC" />
|-
| Mg
| {{chem|[[Magnesium|Mg]](OH)|2}} + 2{{e-}}
|⇌
| Mg(''s'') + 2{{OH-|nolink=y}}
| −2.69
|2
|class="noprint"|<ref name="CRC" />
|-
| Sm
| {{Chem|link=Samarium|Sm|2+}} + 2{{e-}}
|⇌
| Sm(''s'')
| −2.68
|2
|class="noprint"|<ref name="CRC" />
|-
| Be
| {{chem|[[Beryllium|Be]]|2|O|3|2−}} + 3{{H2O-nl}} + 4{{e-}}
|⇌
| 2Be(''s'') + 6{{OH-|nolink=y}}
| −2.63
|4
|class="noprint"|<ref name="CRC" />
|-
| Pm
| {{chem|link=Promethium|Pm|3+}} + {{e-}}
|⇌
| {{Chem|Pm|2+}}
| −2.6
|1
|class="noprint"|<ref name="CRC" />
|-
| Dy
| {{chem|link=Dysprosium|Dy|3+}} + {{e-}}
|⇌
| {{Chem|Dy|2+}}
| −2.6
|1
|class="noprint"|<ref name="CRC" />
|-
| No
| {{Chem|link=Nobelium|No|2+}} + 2{{e-}}
|⇌
| No
| −2.5
|2
|class="noprint"|<ref name="CRC" />
|-
| Hf
| {{chem|[[Hafnium|Hf]]O(OH)|2}} + {{H2O-nl}} + 4{{e-}}
|⇌
| Hf(''s'') + 4{{OH-|nolink=y}}
| −2.5
|4
|class="noprint"|<ref name="CRC" />
|-
| Th
| {{chem|[[Thorium|Th]](OH)|4}} + 4{{e-}}
|⇌
| Th(''s'') + 4{{OH-|nolink=y}}
| −2.48
|4
|class="noprint"|<ref name="CRC" />
|-
| Md
| {{chem|[[Mendelevium|Md]]|2+}} + 2{{e-}}
|⇌
| Md
| −2.4
|2
|class="noprint"|<ref name="CRC" />
|-
| Tm
| {{chem|[[Thulium|Tm]]|2+}} + 2{{e-}}
|⇌
| Tm(''s'')
| −2.4
|2
|class="noprint"|<ref name="CRC" />
|-
| La
| {{chem|link=Lanthanum|La|3+}} + 3{{e-}}
|⇌
| La(''s'')
| −2.379
|3
|class="noprint"|<ref name=van92/>
|-
| Y
| {{chem|link=Yttrium|Y|3+}} + 3{{e-}}
|⇌
| Y(''s'')
| −2.372
|3
|class="noprint"|<ref name=van92/>
|-
| Mg
| {{chem|[[Magnesium|Mg]]|2+}} + 2{{e-}}
|⇌
| Mg(''s'')
| −2.372
|2
|class="noprint"|<ref name=van92/>
|-
| Sc || {{chem2|ScF3}}(''aq'') + 3{{H+|nolink=y}} + 3{{e-}} || ⇌ || Sc(''s'') + 3HF(''aq'') || −2.37 || 3 || class=noprint | <ref name=AS5/>{{rp|792}}
|-
| Zr
| {{Chem|link=Zirconia|Zr|O(OH)|2}}(''s'') + {{H2O-nl}} + 4{{e-}}
|⇌
| Zr(''s'') + 4{{OH-|nolink=y}}
| −2.36
|4
|class="noprint"|<ref name=van92/>
|-
| Pr
| {{chem|link=Praseodymium|Pr|3+}} + 3{{e-}}
|⇌
| Pr(''s'')
| −2.353
|3
|class="noprint"|<ref name="CRC" />
|-
| Ce
| {{chem|link=Cerium|Ce|3+}} + 3{{e-}}
|⇌
| Ce(''s'')
| −2.336
|3
|class="noprint"|<ref name="CRC" />
|-
| Er
| {{chem|link=Erbium|Er|3+}} + 3{{e-}}
|⇌
| Er(''s'')
| −2.331
|3
|class="noprint"|<ref name="CRC" />
|-
| Ho
| {{chem|link=Holmium|Ho|3+}} + 3{{e-}}
|⇌
| Ho(''s'')
| −2.33
|3
|class="noprint"|<ref name="CRC" />
|-
| Al
| {{chem|H|2|[[Aluminium|Al]]O|3|−}} + {{H2O-nl}} + 3{{e-}}
|⇌
| Al(''s'') + 4{{OH-|nolink=y}}
| −2.33
|3
|class="noprint"|<ref name="CRC" />
|-
| Nd
| {{chem|link=Neodymium|Nd|3+}} + 3{{e-}}
|⇌
| Nd(''s'')
| −2.323
|3
|class="noprint"|<ref name="CRC" />
|-
| Tm
| {{chem|link=Thulium|Tm|3+}} + 3{{e-}}
|⇌
| Tm(''s'')
| −2.319
|3
|class="noprint"|<ref name="CRC" />
|-
| Al
| {{chem|Al(OH)|3}}(''s'') + 3{{e-}}
|⇌
| Al(''s'') + 3{{OH-|nolink=y}}
| −2.31
|3
|class="noprint"|<ref name="van??"/>
|-
| Sm
| {{chem|link=Samarium|Sm|3+}} + 3{{e-}}
|⇌
| Sm(''s'')
| −2.304
|3
|class="noprint"|<ref name="CRC" />
|-
| Fm
| [[Fermium|Fm]]{{2+}} + 2{{e-}}
|⇌
| Fm
| −2.3
|2
|class="noprint"|<ref name="CRC" />
|-
| Am
| {{chem|link=Americium|Am|3+}} + {{e-}}
|⇌
| {{Chem|Am|2+}}
| −2.3
|1
|class="noprint"|<ref name="CRC" />
|-
| Dy
| {{chem|link=Dysprosium|Dy|3+}} + 3{{e-}}
|⇌
| Dy(''s'')
| −2.295
|3
|class="noprint"|<ref name="CRC" />
|-
| Lu
| {{chem|link=Lutetium|Lu|3+}} + 3{{e-}}
|⇌
| Lu(''s'')
| −2.28
|3
|class="noprint"|<ref name="CRC" />
|-
| Sc || ScF{{su|b=2|p=+}} + 2{{H+|nolink=y}} + 3{{e-}} || ⇌ || Sc(''s'') + 2HF(''l'') || −2.28 || 3 || class=noprint | <ref name=AS5/>{{rp|792}}
|-
| Tb
| {{chem|link=Terbium|Tb|3+}} + 3{{e-}}
|⇌
| Tb(''s'')
| −2.28
|3
|class="noprint"|<ref name="CRC" />
|-
| Gd
| {{chem|link=Gadolinium|Gd|3+}} + 3{{e-}}
|⇌
| Gd(''s'')
| −2.279
|3
|class="noprint"|<ref name="CRC" />
|-
| '''H'''
| '''{{Chem|link=Hydrogen|H|2}}(''g'') + 2{{e-}}'''
|⇌
| '''2{{chem|H|−}}'''
| '''−2.23'''
|'''2'''
|class="noprint"|<ref name="CRC" />
|-
| Es
| {{Chem|[[Einsteinium|Es]]|2+}} + 2{{e-}}
|⇌
| Es(''s'')
| −2.23
|2
|class="noprint"|<ref name="CRC" />
|-
| Pm
| {{Chem|[[Promethium|Pm]]|2+}} + 2{{e-}}
|⇌
| Pm(''s'')
| −2.2
|2
|class="noprint"|<ref name="CRC" />
|-
| Tm
| {{chem|link=Thulium|Tm|3+}} + {{e-}}
|⇌
| Tm{{2+}}
| −2.2
|1
|class="noprint"|<ref name="CRC" />
|-
| Dy
| {{Chem|[[Dysprosium|Dy]]|2+}} + 2{{e-}}
|⇌
| Dy(''s'')
| −2.2
|2
|class="noprint"|<ref name="CRC" />
|-
| Ac
| {{chem|link=Actinium|Ac|3+}} + 3{{e-}}
|⇌
| Ac(''s'')
| −2.2
|3
|class="noprint"|<ref name="CRC" />
|-
| Yb
| {{chem|link=Ytterbium|Yb|3+}} + 3{{e-}}
|⇌
| Yb(''s'')
| −2.19
|3
|class="noprint"|<ref name="CRC" />
|-
| Cf
| {{Chem|[[Californium|Cf]]|2+}} + 2{{e-}}
|⇌
| Cf(''s'')
| −2.12
|2
|class="noprint"|<ref name="CRC" />
|-
| Nd
| {{Chem|[[Neodymium|Nd]]|2+}} + 2{{e-}}
|⇌
| Nd(''s'')
| −2.1
|2
|class="noprint"|<ref name="CRC" />
|-
| Ho
| {{Chem|[[Holmium|Ho]]|2+}} + 2{{e-}}
|⇌
| Ho(''s'')
| −2.1
|2
|class="noprint"|<ref name="CRC" />
|-
| Sc
| {{chem|link=Scandium|Sc|3+}} + 3{{e-}}
|⇌
| Sc(''s'')
| −2.077
|3
|class="noprint"|<ref>David R. Lide, ed., CRC Handbook of Chemistry and Physics, Internet Version 2005, http://www.hbcpnetbase.com {{Webarchive|url=https://web.archive.org/web/20170724011402/http://www.hbcpnetbase.com/ |date=2017-07-24 }}, CRC Press, Boca Raton, FL, 2005.</ref>
|-
| Al
| {{chem|link=hexafluoroaluminate|AlF|6|3−}} + 3{{e-}}
|⇌
| [[Aluminium|Al]](''s'') + 6{{chem|F|−}}
| −2.069
|3
|class="noprint"|<ref name="CRC" />
|-
| Cm
| {{chem|link=Curium|Cm|3+}} + 3{{e-}}
|⇌
| Cm(''s'')
| −2.04
|3
|class="noprint"|<ref name="CRC" />
|-
| Pu
| {{chem|link=Plutonium|Pu|3+}} + 3{{e-}}
|⇌
| Pu(''s'')
| −2.031
|3
|class="noprint"|<ref name="CRC" />
|-
| Pr
| {{Chem|[[Praseodymium|Pr]]|2+}} + 2{{e-}}
|⇌
| Pr(''s'')
| −2
|2
|class="noprint"|<ref name="CRC" />
|-
| Er
| {{Chem|[[Erbium|Er]]|2+}} + 2{{e-}}
|⇌
| Er(''s'')
| −2
|2
|class="noprint"|<ref name="CRC" />
|-
| Eu
| {{chem|link=Europium|Eu|3+}} + 3{{e-}}
|⇌
| Eu(''s'')
| −1.991
|3
|class="noprint"|<ref name="CRC" />
|-
| Lr
| {{chem|link=Lawrencium|Lr|3+}} + 3{{e-}}
|⇌
| Lr
| −1.96
|3
|class="noprint"|<ref name="CRC" />
|-
| Cf
| {{chem|link=Californium|Cf|3+}} + 3{{e-}}
|⇌
| Cf(''s'')
| −1.94
|3
|class="noprint"|<ref name="CRC" />
|-
| Es
| {{chem|link=Einsteinium|Es|3+}} + 3{{e-}}
|⇌
| Es(''s'')
| −1.91
|3
|class="noprint"|<ref name="CRC" />
|-
| Pa
| {{chem|[[Protactinium|Pa]]|4+}} + {{e-}}
|⇌
| {{chem|Pa|3+}}
| −1.9
|1
|class="noprint"|<ref name="CRC" />
|-
| Am
| {{chem|[[Americium|Am]]|2+}} + 2{{e-}}
|⇌
| Am(''s'')
| −1.9
|2
|class="noprint"|<ref name="CRC" />
|-
| Th
| {{chem|[[Thorium|Th]]|4+}} + 4{{e-}}
|⇌
| Th(''s'')
| −1.899
|4
|class="noprint"|<ref name="CRC" />
|-
| Fm
| {{chem|link=Fermium|Fm|3+}} + 3{{e-}}
|⇌
| Fm
| −1.89
|3
|class="noprint"|<ref name="CRC" />
|-
| N || {{chem2|N2}}(''g'') + 2{{H2O-nl}}(''l'') + 4{{H+|nolink=y}} + 2{{e-}} || ⇌ || 2{{chem2|NH3OH+}} || −1.87 || 2 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Np
| {{chem|link=Neptunium|Np|3+}} + 3{{e-}}
|⇌
| Np(''s'')
| −1.856
|3
|class="noprint"|<ref name="CRC" />
|-
| Be
| {{chem|[[Beryllium|Be]]|2+}} + 2{{e-}}
|⇌
| Be(''s'')
| −1.847
|2
|class="noprint"|<ref name="CRC" />
|-
| P
| {{chem|H|2|PO|2|-}} + {{e-}}
|⇌
| P(''s'') + 2{{OH-|nolink=y}}
| −1.82
|1
|class="noprint"|<ref name="CRC" />
|-
| U
| {{chem|link=Uranium|U|3+}} + 3{{e-}}
|⇌
| U(''s'')
| −1.798
|3
|class="noprint"|<ref name="CRC" />
|-
| Sr
| {{chem|[[Strontium|Sr]]|2+}} + 2{{e-}}
|⇌
| Sr([[Amalgam (chemistry)|''Hg'']])
| −1.793
|2
|class="noprint"|<ref name="CRC" />
|-
| B
| {{chem|H|2|BO|3|−}} + {{H2O-nl}} + 3{{e-}}
|⇌
| B(''s'') + 4{{OH-|nolink=y}}
| −1.79
|3
|class="noprint"|<ref name="CRC" />
|-
| Th
| {{chem|link=Thorium dioxide|ThO|2}} + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| Th(''s'') + 2{{H2O-nl}}
| −1.789
|4
|class="noprint"|<ref name="CRC" />
|-
| Hf
| {{chem|[[Hafnium|Hf]]O|2+}} + 2{{H+|nolink=y}} + 4{{e-}}
|⇌
| Hf(''s'') + {{H2O-nl}}
| −1.724
|4
|class="noprint"|<ref name="CRC" />
|-
| P
| {{chem|HPO|3|2−}} + 2{{H2O-nl}} + 3{{e-}}
|⇌
| P(''s'') + 5{{OH-|nolink=y}}
| −1.71
|3
|class="noprint"|<ref name="CRC" />
|-
| Si
| [[Silicate|{{chem|SiO|3|2−}}]] + 3{{H2O-nl}} + 4{{e-}}
|⇌
| Si(''s'') + 6{{OH-|nolink=y}}
| −1.697
|4
|class="noprint"|<ref name="CRC" />
|-
| Al
| {{chem|link=Aluminium|Al|3+}} + 3{{e-}}
|⇌
| Al(''s'')
| −1.662
|3
|class="noprint"|<ref name="CRC" />
|-
| Ti
| {{chem|[[Titanium|Ti]]|2+}} + 2{{e-}}
|⇌
| Ti(''s'')
| −1.63
|2
|class="noprint"|<ref name=Atk/>
|-
| Zr
| {{chem|[[Zirconium dioxide|ZrO]]|2}}(''s'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| Zr(''s'') + 2{{H2O-nl}}
| −1.553
|4
|class="noprint"|<ref name=van/>
|-
| Zr
| {{chem|[[Zirconium|Zr]]|4+}} + 4{{e-}}
|⇌
| Zr(''s'')
| −1.45
|4
|class="noprint"|<ref name=van/>
|-
| Ti
| {{chem|Ti|3+}} + 3{{e-}}
|⇌
| Ti(''s'')
| −1.37
|3
|class="noprint"|<ref name=si/>
|-
| Ti
| [[Titanium(II) oxide|TiO]](''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| Ti(''s'') + {{H2O-nl}}
| −1.31
|2
|class="noprint"|<ref name=AS5/>{{rp|792}}
|-
| B || B(OH){{su|b=4|p=&minus;}} + 4{{H2O-nl}}(''l'') + 8{{e-}} || ⇌ || BH{{su|b=4|p=&minus;}} + 8{{OH-|nolink=y}} || −1.24 || 8 || class=noprint | <ref name=AS5/>{{rp|788}}
|-
| Ti
| {{chem|link=Titanium(III) oxide|Ti|2|O|3}}(''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| 2TiO(''s'') + {{H2O-nl}}
| −1.23
|2
|class="noprint"|<ref name=AS5/>{{rp|792}}
|-
| Ga || GaO(OH){{su|b=2|p=&minus;}} + {{H2O-nl}}(''l'') + 3{{e-}} || ⇌ || Ga(''s'') + 3{{OH-|nolink=y}} || −1.22 || 3 || class=noprint | <ref name=AS5/>{{rp|788}}
|-
| Zn
| {{chem|Zn(OH)|4|2−}} + 2{{e-}}
|⇌
| Zn(''s'') + 4{{OH-|nolink=y}}
| −1.199
|2
|class="noprint"|<ref name=van/>
|-
| Mn
| {{chem|[[Manganese|Mn]]|2+}} + 2{{e-}}
|⇌
| Mn(''s'')
| −1.185
|2
|class="noprint"|<ref name=van/>
|-
| Fe
| {{chem|[[Iron|Fe]](CN)|6|4−}} + 6{{H+|nolink=y}} + 2{{e-}}
|⇌
| Fe(''s'') + 6HCN(''aq'')
| −1.16
|2
|class="noprint"|<ref name=webelements_fe>{{#invoke:cite|web|title=compounds information |work=Iron |publisher=WebElements Periodic Table of the Elements |url=http://www.webelements.com/iron/compounds.html}}</ref>
|-
| C || C(''s'') + 3{{H2O-nl}}(''l'') + 2{{e-}} || ⇌ || {{chem2|CH3OH}}(''l'') + 2{{OH-|nolink=y}} || −1.148 || 2 || class=noprint | <ref name=AS5 />{{rp|788}}
|-
| Cr || Cr(CN){{su|b=6|p=3&minus;}} + {{e-}} || ⇌ || Cr(CN){{su|b=6|p=4&minus;}} || −1.143 || 1 || class=noprint | <ref name=AS5/>{{rp|793}}
|-
| Te
| [[Tellurium|Te]](''s'') + 2{{e-}}
|⇌
| {{chem|Te|2−}}
| −1.143
|2
|class="noprint"|<ref name=Bar/>
|-
| V
| {{chem|[[Vanadium|V]]|2+}} + 2{{e-}}
|⇌
| V(''s'')
| −1.13
|2
|class="noprint"|<ref name=Bar/>
|-
| Nb
| {{chem|link=Niobium|Nb|3+}} + 3{{e-}}
|⇌
| Nb(''s'')
| −1.099
|3
|class="noprint"|<ref name="van??"/>
|-
| Sn
| [[Tin|Sn]](''s'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| {{chem|SnH|4}}(''g'')
| −1.07
|4
|class="noprint"|
|-
| Po
| [[Polonium|Po]](''s'') + 2{{e-}}
|⇌
| {{chem|Po|2−}}
| −1.021
|2
|class="noprint"|<ref>{{#invoke:cite|book| last1=Brown | first1=Susan A. | last2=Brown | first2=Paul L. | title=The Aqueous Chemistry of Polonium and the Practical Application of its Thermochemistry | chapter=The pH-potential diagram for polonium | publisher=Elsevier | date=2020 | isbn=978-0-12-819308-2 | doi=10.1016/b978-0-12-819308-2.00004-8| s2cid=213141476 }}</ref>
|-
| Cr || [Cr(edta)(H<sub>2</sub>O)]<sup>&minus;</sup> + {{e-}} || ⇌ || [Cr(edta)(H<sub>2</sub>O)]<sup>2&minus;</sup> || −0.99 || 1 || class=noprint | <ref name=AS5/>{{rp|793}}
|-
| P || 2{{chem2|H3PO4}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || {{chem2|(H2PO3)2}}(''aq'') + {{H2O-nl}}(''l'') || −0.933 || 2 || class=noprint | <ref name=AS5/>{{rp|789}}
|-
| C || CO{{su|b=3|p=2&minus;}} + 3{{H+|nolink=y}} + 2{{e-}} || ⇌ || HCO{{su|b=2|p=&minus;}} + {{H2O-nl}}(''l'') || −0.93 || 2 || class=noprint | <ref name=AS5/>{{rp|788}}
|-
| Ti
| {{chem|TiO|2+}} + 2{{H+|nolink=y}} + 4{{e-}}
|⇌
| Ti(''s'') + {{H2O-nl}}
| −0.93
|4
|class="noprint"|
|-
| Si
| {{chem|link=Silicon dioxide|SiO|2}}(''[[quartz]]'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| Si(''s'') + 2{{H2O-nl}}
| −0.909
|4
|class="noprint"|<ref name=AS5/>{{rp|788}}
|-
| Cr || {{chem|Cr|2+}} + 2{{e-}} || ⇌ || Cr(''s'') || −0.9 || 2 || class=noprint | <ref name=AS5/>{{rp|793}}
|-
| B
| {{chem|link=Boric acid|B(OH)|3}}(''aq'') + 3{{H+|nolink=y}} + 3{{e-}}
|⇌
| B(''s'') + 3{{H2O-nl}}
| −0.89
|3
|class="noprint"| <ref name=AS5 />{{rp|788}}
|-
| Fe
| {{chem|Fe(OH)|2}}(''s'') + 2{{e-}}
|⇌
| Fe(''s'') + 2{{OH-|nolink=y}}
| −0.89
|2
|class="noprint"|<ref name=webelements_fe/>
|-
| Fe
| {{chem|Fe|2|O|3}}(''s'') + 3{{H2O-nl}} + 2{{e-}}
|⇌
| 2{{chem|Fe(OH)|2}}(''s'') + 2{{OH-|nolink=y}}
| −0.86
|2
|class="noprint"|<ref name=webelements_fe/>
|-
| '''H'''
| '''2{{H2O-nl}} + 2{{e-}}'''
|⇌
| '''{{chem|H|2}}(''g'') + 2{{OH-|nolink=y}}'''
| '''−0.8277'''
|'''2'''
|class="noprint"|<ref name=van/>
|-
| Bi
| [[Bismuth|Bi]](''s'') + 3{{H+|nolink=y}} + 3{{e-}}
|⇌
| {{chem|link=Bismuthine|BiH|3}}
| −0.8
|3
|class="noprint"|<ref name=van/>
|-
| Zn
| {{chem|[[Zinc|Zn]]|2+}} + 2{{e-}}
|⇌
| Zn(''Hg'')
| −0.7628
|2
|class="noprint"|<ref name=van/>
|-
| Zn
| {{chem|[[Zinc|Zn]]|2+}} + 2{{e-}}
|⇌
| Zn(''s'')
| −0.7618
|2
|class="noprint"|<ref name=van/>
|-
| Ta
|{{chem|link=Tantalum pentoxide|Ta|2|O|5}}(''s'') + 10{{H+|nolink=y}} + 10{{e-}}
|⇌
| 2[[Tantalum|Ta]](''s'') + 5{{H2O-nl}}
| −0.75
|10
|class="noprint"|
|-
| Cr
| {{chem|[[Chromium|Cr]]|3+}} + 3{{e-}}
|⇌
| Cr(''s'')
| −0.74
|3
|class="noprint"|<ref name=Atk/>
|-
| Te || 2Te(''s'') + 2{{e-}} || ⇌ || Te{{su|b=2|p=2&minus;}} || −0.74 || 2 || class=noprint | <ref name=AS5/>{{rp|790}}
|-
|Ni
| {{Chem|link=Nickel(II) hydroxide|Ni(OH)|2}}(''s'') + 2{{e-}}
|⇌
| Ni(''s'') + 2{{OH-|nolink=y}}
| −0.72
|2
|class="noprint"|<ref name="CRC" />
|-
| Nb || {{chem2|Nb2O5}}(''s'') + 10{{H+|nolink=y}} + 10{{e-}} || ⇌ || 2Nb(''s'') + 5{{H2O-nl}}(''l'') || −0.7 || 10 || class=noprint | <ref name=AS5/>{{rp|793}}
|-
| Ag
| {{chem|link=silver sulfide|Ag|2|S}}(''s'') + 2{{e-}}
|⇌
| 2Ag(''s'') + {{chem|[[Sulphur|S]]|2−}}(''aq'')
| −0.69
|2
|class="noprint"|
|-
| Te || Te{{su|b=2|p=2&minus;}} + 4{{H+|nolink=y}} + 2{{e-}} || ⇌ || 2{{chem2|H2Te}}(''g'') || −0.64 || 2 || class=noprint | <ref name=AS5/>{{rp|790}}
|-
| Sb || Sb(OH){{su|b=4|p=&minus;}} + 3{{e-}} || ⇌ || Sb(''s'') + 4{{OH-|nolink=y}} || −0.639 || 3 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Au
| {{chem|[Au(CN)|2|]|−}} + {{e-}}
|⇌
| [[Gold|Au]](''s'') + 2{{chem|CN|−}}
| −0.6
|1
|class="noprint"|
|-
| Ta
| {{chem|Ta|3+}} + 3{{e-}}
|⇌
| Ta(''s'')
| −0.6
|3
|class="noprint"|<ref name="van??"/>
|-
| Pb
| [[Lead(II) oxide|PbO]](''s'') + {{H2O-nl}} + 2{{e-}}
|⇌
| Pb(''s'') + 2{{OH-|nolink=y}}
| −0.580
|2
|class="noprint"|<ref name="van??"/>
|-
| Ti
| 2{{chem|TiO|2}}(''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|Ti|2|O|3}}(''s'') + {{H2O-nl}}
| −0.56
|2
|class="noprint"|<ref name=AS5/>{{rp|792}}
|-
| Ga
| {{chem|link=Gallium|Ga|3+}} + 3{{e-}}
|⇌
| Ga(''s'')
| −0.549
|3
|class="noprint"|<ref name="van??"/>
|-
| U
| {{chem|U|4+}} + {{e-}}
|⇌
| {{chem|U|3+}}
| −0.52
|1
|class="noprint"|<ref name=Bar2/>
|-
| P
| {{chem|link=Hypophosphorous acid|H|3|PO|2}}(''aq'') + {{H+|nolink=y}} + {{e-}}
|⇌
| P(''white'')<ref name=rwP group=note /> + 2{{H2O-nl}}
| −0.508
|1
|class="noprint"|<ref name=van/>
|-
| P
| {{chem|H|3|PO|3}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|H|3|PO|2}}(''aq'') + {{H2O-nl}}
| −0.499
|2
|class="noprint"|<ref name=van/>
|-
|Ni
| {{Chem|NiO|2}}(''s'') + 2{{H2O-nl}} + 2{{e-}}
|⇌
| {{Chem|link=Nickel(II) hydroxide|Ni(OH)|2}}(''s'') + 2{{OH-|nolink=y}}
| −0.49
|2
|class="noprint"|<ref name="CRC" />
|-
| Sb || Sb(OH){{su|b=6|p=&minus;}} + 2{{e-}} || ⇌ || Sb(OH){{su|b=4|p=&minus;}} + 2{{OH-|nolink=y}} || −0.465 || 2 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| P
| [[Phosphorous acid|{{chem|H|3|PO|3}}]](''aq'') + 3{{H+|nolink=y}} + 3{{e-}}
|⇌
| P(''red'')<ref name=rwP group=note /> + 3{{H2O-nl}}
| −0.454
|3
|class="noprint"|<ref name=van/>
|-
| Bi || {{chem2|Bi2O3}}(''s'') + 3{{H2O-nl}}(''l'') + 6{{e-}} || ⇌ || Bi(''s'') + 6{{OH-|nolink=y}} || −0.452 || 6 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Ta || TaF{{su|b=7|p=2&minus;}} + 7{{H+|nolink=y}} + 5{{e-}} || ⇌ || Ta(''s'') + 7HF(''l'') || −0.45 || 5 || class=noprint | <ref name=AS5/>{{rp|793}}
|-
| In || {{chem|In|3+}} + 2{{e-}} || ⇌ || {{chem2|In+}} || −0.444 || 2 || class=noprint | <ref name=AS5 />{{rp|788}}
|-
|Cu
| {{Chem|Cu(CN)|2|-}} + {{E-}}
|⇌
| Cu(''s'') + 2{{Chem|CN|-}}
| −0.44
|1
|class="noprint"|<ref name="Bar" />
|-
| Fe
| {{chem|[[Iron|Fe]]|2+}} + 2{{e-}}
|⇌
| Fe(''s'')
| −0.44
|2
|class="noprint"|<ref name=Atk/>
|-
| C
| 2{{chem|link=carbon dioxide|CO|2}}(''g'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| [[Oxalic acid|HOOCCOOH]](''aq'')
| −0.43
|2
|class="noprint"|
|-
| Cr
| {{chem|Cr|3+}} + {{e-}}
|⇌
| {{chem|Cr|2+}}
| −0.407
|1
|class="noprint"|<ref name="van??"/>
|-
| Cd
| {{chem|[[Cadmium|Cd]]|2+}} + 2{{e-}}
|⇌
| Cd(''s'')
| −0.4
|2
|class="noprint"|<ref name="van??"/>
|-
| Ti || {{chem|Ti|3+}} + {{e-}} || ⇌ || {{chem|Ti|2+}} || −0.37 || 1 || class=noprint | <ref name=AS5/>{{rp|792}}
|-
| Cu
| {{chem|link=Copper(I) oxide|Cu|2|O}}(''s'') + {{H2O-nl}} + 2{{e-}}
|⇌
| 2Cu(''s'') + 2{{OH-|nolink=y}}
| −0.36
|2
|class="noprint"|<ref name=van/>
|-
| Pb
| {{chem|link=Lead(II) sulfate|PbSO|4}}(''s'') + 2{{e-}}
|⇌
| [[Lead|Pb]](''s'') + {{chem|SO|4|2−}}
| −0.3588
|2
|class="noprint"|<ref name=van/>
|-
| Pb
| {{chem|PbSO|4}}(''s'') + 2{{e-}}
|⇌
| Pb(''Hg'') + {{chem|SO|4|2−}}
| −0.3505
|2
|class="noprint"|<ref name=van/>
|-
| Eu
| {{chem|[[Europium|Eu]]|3+}} + {{e-}}
|⇌
| {{chem|Eu|2+}}
| −0.35
|1
|class="noprint"|<ref name=Bar2/>
|-
| In
| {{chem|link=Indium|In|3+}} + 3{{e-}}
|⇌
| In(''s'')
| −0.34
|3
|class="noprint"|<ref name=Bar/>
|-
| Tl
| {{chem|[[Thallium|Tl]]|+}} + {{e-}}
|⇌
| Tl(''s'')
| −0.34
|1
|class="noprint"|<ref name=Bar/>
|-
| Ge
| [[Germanium|Ge]](''s'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| {{chem|GeH|4}}(''g'')
| −0.29
|4
|class="noprint"|
|-
| Co
| {{chem|[[Cobalt|Co]]|2+}} + 2{{e-}}
|⇌
| Co(''s'')
| −0.28
|2
|class="noprint"|<ref name=van/>
|-
| P
| {{chem|link=Phosphoric acid|H|3|PO|4}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|H|3|PO|3}}(''aq'') + {{H2O-nl}}
| −0.276
|2
|class="noprint"|<ref name=van/>
|-
| N || N<sub>2</sub>(''g'') + 8{{H+|nolink=y}} + 6{{e-}} || ⇌ || 2NH{{su|b=4|p=+}} || −0.27 || 6 || class=noprint | <ref name=Lee />
|-
| V
| {{chem|link=Vanadium|V|3+}} + {{e-}}
|⇌
| {{chem|V|2+}}
| −0.26
|1
|class="noprint"|<ref name=Atk/>
|-
| Ni
| {{chem|link=Nickel|Ni|2+}} + 2{{e-}}
|⇌
| Ni(''s'')
| −0.257
|2
|class="noprint"|<ref name="van??"/>
|-
| S || 2HSO{{su|b=4|p=&minus;}} + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || S<sub>2</sub>O{{su|b=6|p=2&minus;}} + 2{{H2O-nl}}(''l'') || −0.253 || 2 || class=noprint | <ref name=AS5 />{{rp|790}}
|-
| As
| [[Arsenic|As]](''s'') + 3{{H+|nolink=y}} + 3{{e-}}
|⇌
| {{chem|link=Arsine|AsH|3}}(''g'')
| −0.23
|3
|class="noprint"|<ref name=Bar/>
|-
| N || N<sub>2</sub>(''g'') + 5{{H+|nolink=y}} + 4{{e-}} || ⇌ || N<sub>2</sub>H{{su|b=5|p=+}} || −0.23 || 4 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Ga
| {{chem|link=Gallium|Ga|+}} + {{e-}}
|⇌
| Ga(''s'')
| −0.2
|1
|class="noprint"|<ref name="van??"/>
|-
| Ag
| [[Silver iodide|AgI]](''s'') + {{e-}}
|⇌
| Ag(''s'') + {{Chem|I|-}}
| −0.15224
|1
|class="noprint"|<ref name=van/>
|-
| Ge || GeO<sub>2</sub>(''s'') + 4{{H+|nolink=y}} + 4{{e-}} || ⇌ || Ge(''s'') + 2H<sub>2</sub>O(''l'') || −0.15 || 4 || class="noprint" | <ref name=Lee />
|-
| Mo
| {{chem|link=Molybdenum dioxide|MoO|2}}(''s'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| Mo(''s'') + 2{{H2O-nl}}
| −0.15
|4
|class="noprint"|
|-
| Si
| [[Silicon|Si]](''s'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| {{chem|SiH|4}}(''g'')
| −0.14
|4
|class="noprint"|
|-
| Sn
| {{chem|Sn|2+}} + 2{{e-}}
|⇌
| Sn(''s'')
| −0.13
|2
|class="noprint"|
|-
| O
| {{chem|link=Oxygen|O|2}}(''g'') + {{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|HO|2|•}}(''aq'')
| −0.13
|1
|class="noprint"|
|-
| In || {{chem2|In+}} + {{e-}} || ⇌ || In(''s'') || −0.126 || 1 || class=noprint | <ref name=AS5 />{{rp|788}}
|-
| Pb
| {{chem|link=Lead|Pb|2+}} + 2{{e-}}
|⇌
| Pb(''s'')
| −0.126
|2
|class="noprint"|<ref name=Atk/>
|-
| W
| {{chem|link=Tungsten(IV) oxide|WO|2}}(''s'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| [[Tungsten|W]](''s'') + 2{{H2O-nl}}
| −0.12
|4
|class="noprint"|
|-
| Ge
| {{chem|link=Germanium dioxide|GeO|2}}(''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| GeO(''s'') + {{H2O-nl}}
| −0.118
|2
|class="noprint"|<ref name="van??"/>
|-
| P
| [[Phosphorus|P]](''red'') + 3{{H+|nolink=y}} + 3{{e-}}
|⇌
| {{chem|link=Phosphine|PH|3}}(''g'')
| −0.111
|3
|class="noprint"|<ref name=van/>
|-
| C
| {{chem|CO|2}}(''g'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| [[Formic acid|HCOOH]](''aq'')
| −0.11
|2
|class="noprint"|
|-
| Se
| [[Selenium|Se]](''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|H|2|Se}}(''g'')
| −0.11
|2
|class="noprint"|<ref name=AS5/>{{rp|790}}
|-
| C
| {{chem|CO|2}}(''g'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| CO(''g'') + {{H2O-nl}}
| −0.11
|2
|class="noprint"|
|-
| Sn || &alpha;-[[Tin(II) oxide|SnO]](''s'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || Sn(''s'') + {{H2O-nl}} || −0.104 || 2 || class="noprint" | <ref name=AS5 />{{rp|788}}
|-
|Cu
| {{Chem|Cu(NH|3|)|2|+}} + {{e-}}
|⇌
|Cu(''s'') + 2{{chem|NH|3}}(''aq'')
| −0.1
|1
|class="noprint"|<ref name="Bar" />
|-
| Nb || {{chem2|Nb2O5}}(''s'') + 10{{H+|nolink=y}} + 4{{e-}} || ⇌ || 2{{chem|Nb|3+}} + 5{{H2O-nl}}(''l'') || −0.1 || 4 || class=noprint | <ref name=AS5/>{{rp|793}}
|-
| W
| {{chem|link=Tungsten(VI) oxide|WO|3}}(''aq'') + 6{{H+|nolink=y}} + 6{{e-}}
|⇌
| W(''s'') + 3{{H2O-nl}}
| −0.09
|6
|class="noprint"|<ref name=Bar/>
|-
| Sn
| {{chem|link=Tin dioxide|SnO|2}}(''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| &alpha;-SnO(''s'') + {{H2O-nl}}
| −0.088
|2
|class="noprint"| <ref name=AS5 />{{rp|788}}
|-
| Fe
| [[Magnetite|{{chem|Fe|3|O|4}}]](''s'') + 8{{H+|nolink=y}} + 8{{e-}}
|⇌
| 3Fe(''s'') + 4{{H2O-nl}}
| −0.085
|8
|class="noprint"|<ref name=Pou/>
|-
| V || {{chem|V|O|H|2+}} + {{H+|nolink=y}} + {{e-}} || ⇌ || {{chem|V|2+}} + {{H2O-nl}}(''l'') || −0.082 || 1 || class=noprint | <ref name=AS5 />{{rp|793}}
|-
| P
| [[Phosphorus|P]](''white'') + 3{{H+|nolink=y}} + 3{{e-}}
|⇌
| {{chem|link=Phosphine|PH|3}}(''g'')
| −0.063
|3
|class="noprint"|<ref name=van/>
|-
| N || {{chem2|N2O}}(''g'') + {{H2O-nl}}(''l'') + 6{{H+|nolink=y}} + 4{{e-}} || ⇌ || 2{{chem2|NH3OH+}} || −0.05 || 4 || class=noprint | <ref name=AS5/>{{rp|789}}
|-
| Fe
| {{chem|Fe|3+}} + 3{{e-}}
|⇌
| Fe(''s'')
| −0.04
|3
|class="noprint"|<ref name=webelements_fe/>
|-
| C
| [[Formic acid|HCOOH]](''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| [[Formaldehyde|HCHO]](''aq'') + {{H2O-nl}}
| −0.034
|2
|class="noprint"| <ref name=AS5 />{{rp|788}}
|- style="background-color:#d0d0FF; font-weight: bold"
| H
| 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|H|2}}(''g'')
|  0
|2
| class="noprint" |
|-
| Ag
| [[Silver bromide|AgBr]](''s'') + {{e-}}
|⇌
| Ag(''s'') + {{Chem|Br|-}}
| 0.07133
|1
|class="noprint"|<ref name=van/>
|-
| S
| [[Tetrathionate|{{chem|S|4|O|6|2−}}]] + 2{{e-}}
|⇌
| 2[[Thiosulfate|{{chem|S|2|O|3|2−}}]]
| 0.08
|2
|class="noprint"|
|-
| N
| {{chem|link=Nitrogen|N|2}}(''g'') + 2{{H2O-nl}} + 6{{H+|nolink=y}} + 6{{e-}}
|⇌
| 2{{chem|link=Ammonium hydroxide|NH|4|OH}}(''aq'')
| 0.092
|6
|class="noprint"|
|-
| Hg
| [[Mercury(II) oxide|HgO]](''s'') + {{H2O-nl}} + 2{{e-}}
|⇌
| Hg(''l'') + 2{{OH-|nolink=y}}
| 0.0977
|2
|class="noprint"|
|-
| Cu
| {{chem|Cu(NH|3|)|4|2+}} + {{e-}}
|⇌
| {{chem|Cu(NH|3|)|2|+}} + 2{{chem|NH|3}}(''aq'')
| 0.1
|1
|class="noprint"|<ref name=Bar/>
|-
| Ru
|[[Ruthenium|{{chem|Ru(NH|3|)|6|3+}}]] + {{e-}}
|⇌
| {{chem|Ru(NH|3|)|6|2+}}
| 0.1
|1
|class="noprint"|<ref name=Bar2/>
|-
| N
| {{chem|link=Hydrazine|N|2|H|4}}(''aq'') + 4{{H2O-nl}} + 2{{e-}}
|⇌
| 2{{chem|NH|4|+}} + 4{{OH-|nolink=y}}
| 0.11
|2
|class="noprint"|<ref name=Gre/>
|-
| Mo
| {{chem|link=Molybdic acid|H|2|MoO|4}}(''aq'') + 6{{H+|nolink=y}} + 6{{e-}}
|⇌
| Mo(''s'') + 4{{H2O-nl}}
| 0.11
|6
|class="noprint"|
|-
| Ge
| {{chem|Ge|4+}} + 4{{e-}}
|⇌
| Ge(''s'')
| 0.12
|4
|class="noprint"|
|-
| C
| [[Carbon|C]](''s'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| {{chem|link=Methane|CH|4}}(''g'')
| 0.13
|4
|class="noprint"|<ref name=Bar/>
|-
| C
| [[Formaldehyde|HCHO]](''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|link=Methanol|CH|3|OH}}(''aq'')
| 0.13
|2
|class="noprint"|
|-
| S
| [[Sulfur|S]](''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|H|2|S}}(''g'')
| 0.144
|2
|class="noprint"|<ref name=AS5/>{{rp|790}}
|-
| Sb || Sb<sub>2</sub>O<sub>3</sub>(''s'') + 6{{H+|nolink=y}} + 6{{e-}} || ⇌ || 2Sb(''s'') + 3H<sub>2</sub>O || 0.15 || 6 || <ref name=AS5 />{{rp|789}}
|-
| Sn
| {{chem|Sn|4+}} + 2{{e-}}
|⇌
| {{chem|Sn|2+}}
| 0.151
|2
|class="noprint"|<ref name="van??"/>
|-
| S
| {{chem|HSO|4|-}} + 3{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|SO|2}}(''aq'') + 2{{H2O-nl}}
| 0.158
|2
|class="noprint"|<ref name=AS5/>{{rp|790}}
|-
| Cu
| {{chem|link=Copper|Cu|2+}} + {{e-}}
|⇌
| {{chem|Cu|+}}
| 0.159
|1
|class="noprint"|<ref name=Bar/>
|-
| U
| {{chem|link=Uranyl|UO|2|2+}} + {{e-}}
|⇌
| {{chem|UO|2|+}}
| 0.163
|1
|class="noprint"|<ref name=Bar2/>
|-
| S
| {{chem|SO|4|2-}} + 4{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|SO|2}}(''aq'') + 2{{H2O-nl}}
| 0.17
|2
|class="noprint"|
|-
| Ti
| {{chem|TiO|2+}} + 2{{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|Ti|3+}} + {{H2O-nl}}
| 0.19
|1
|class="noprint"|
|-
| Sb
| {{chem|SbO|+}} + 2{{H+|nolink=y}} + 3{{e-}}
|⇌
| Sb(''s'') + {{H2O-nl}}
| 0.2
|3
|class="noprint"|
|-
| Fe
| 3{{chem|link=Hematite|Fe|2|O|3}}(s) + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| 2{{chem|link=Magnetite|Fe|3|O|4}}(s) + {{H2O-nl}}
| 0.22
|2
|class="noprint"|<ref name=Pang2007/>{{rp|p.100}}
|-
| Ag
| [[Silver chloride|AgCl]](''s'') + {{e-}}
|⇌
| Ag(''s'') + {{chem|Cl|-}}
| 0.22233
|1
|class="noprint"|<ref name=van/>
|-
| As
| {{chem|link=Arsenic acid|H|3|AsO|3}}(''aq'') + 3{{H+|nolink=y}} + 3{{e-}}
|⇌
| As(''s'') + 3{{H2O-nl}}
| 0.24
|3
|class="noprint"| <ref name=AS5 />{{rp|789}}
|-
| Ru
| {{chem|Ru|3+}}(''aq'') + {{e-}}
|⇌
| {{chem|Ru|2+}}(''aq'')
| 0.249
|1
|class="noprint"|<ref name=Greenwood1077 />
|-
| Pb || {{chem2|PbO2}}(''s'') + {{H2O-nl}} + 2{{e-}} || ⇌ || &alpha;-{{chem2|PbO}}(''s'') + 2{{OH-|nolink=y}} || 0.254 || 2 || class=noprint | <ref name=AS5 />{{rp|788}}
|-
| Ge
| GeO(''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| Ge(''s'') + {{H2O-nl}}
| 0.26
|2
|class="noprint"|
|-
| Hg || {{chem2|Hg2Cl2}}(''s'') + 2{{e-}} || ⇌ || 2Hg(''l'') + 2{{chem2|Cl-}} || 0.27 || 2 || class=noprint | <ref name=Lee />
|-
| U
| {{chem|UO|2|+}} + 4{{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|U|4+}} + 2{{H2O-nl}}
| 0.273
|1
|class="noprint"|<ref name=Bar2/>
|-
| Re
| {{chem|link=Rhenium|Re|3+}} + 3{{e-}}
|⇌
| Re(''s'')
| 0.300
|3
|class="noprint"|<ref name="van??"/>
|-
| At
| At + {{e-}}
|⇌
| At<sup>&minus;</sup>
|0.3
|1
|class="noprint"|<ref name=":0">{{#invoke:cite|book| last1=Lavrukhina | first1=Avgusta Konstantinovna | last2=Pozdni︠a︡kov | first2=Aleksandr Aleksandrovich | title=Analytical chemistry of technetium, promethium, astatine and francium | publisher=Ann Arbor-Humphrey Science Publishers | publication-place=Ann Arbor | date=1970 | isbn=0-250-39923-7 | oclc=186926 |page=237}}</ref>
|-
| Bi
| {{chem|Bi|3+}} + 3{{e-}}
|⇌
| Bi(''s'')
| 0.308
|3
|class="noprint"|<ref name=van/>
|-
| C
| 2HCNO + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| (CN)<sub>2</sub> + 2{{H2O-nl}}
| 0.330
|2
|class="noprint"|<ref name="van??"/>
|-
| Cu
| {{chem|Cu|2+}} + 2{{e-}}
|⇌
| Cu(''s'')
| 0.337
|2
|class="noprint"|<ref name=Bar/>
|-
| V
| {{chem|V|O|2+}} + 2{{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|V|3+}} + {{H2O-nl}}
| 0.337
|1
|class="noprint"|<ref name=AS5/>{{rp|793}}
|-
| Sb || {{chem2|Sb2O4}}(''s'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || {{chem2|Sb2O3}}(''s'') + {{H2O-nl}}(''l'') || 0.342 || 2 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| At
| At<sup>+</sup> + 2{{e-}}
|⇌
|At<sup>−</sup>
| 0.36
|2
|class="noprint"|<ref name=":2">{{#invoke:cite|journal| last1=Champion | first1=J. | last2=Alliot | first2=C. | last3=Renault | first3=E. | last4=Mokili | first4=B. M. | last5=Chérel | first5=M. | last6=Galland | first6=N. | last7=Montavon | first7=G. | title=Astatine Standard Redox Potentials and Speciation in Acidic Medium | journal=The Journal of Physical Chemistry A | publisher=American Chemical Society (ACS) | volume=114 | issue=1 | date=2009-12-16 | issn=1089-5639 | doi=10.1021/jp9077008 | pages=576–582| pmid=20014840 | s2cid=15738065 | url=http://hal.in2p3.fr/in2p3-00450771/file/JPCA_2010.pdf }}</ref>
|-
| Fe
| {{chem|[Fe(CN)|6|]|3-}} + {{e-}}
|⇌
| {{chem|[Fe(CN)|6|]|4-}}
|  0.3704
|1
|class="noprint"|<ref>{{#invoke:cite|journal|last=Rock|first=Peter A.|date=February 1966|title=The Standard Oxidation Potential of the Ferrocyanide-Ferricyanide Electrode at 25° and the Entropy of Ferrocyanide Ion|journal=The Journal of Physical Chemistry|volume=70|issue=2|pages=576–580|doi=10.1021/j100874a042|issn=0022-3654}}</ref>
|-
| C
| [[cyanogen|(CN)<sub>2</sub>]] + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| 2[[hydrocyanic acid|HCN]]
| 0.373
|2
|class="noprint"|<ref name="van??"/>
|-
| P || {{chem2|(H2PO3)2}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || 2{{chem2|H3PO3}} || 0.38 || 2 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| S || 2SO<sub>2</sub>(''aq'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || S<sub>2</sub>O{{su|b=3|p=2&minus;}} + H<sub>2</sub>O(''l'') || 0.4 || 2 || class=noprint | <ref name=AS5 />{{rp|790}}
|-
| '''O'''
| '''{{chem|O|2}}(''g'') + 2{{H2O-nl}} + 4{{e-}}'''
|⇌
| '''4{{OH-|nolink=y}}(''aq'')'''
| '''0.401'''
|'''4'''
|class="noprint"|<ref name=Atk/>
|-
| Mo
| {{chem|H|2|MoO|4}} + 6{{H+|nolink=y}} + 3{{e-}}
|⇌
| {{chem|Mo|3+}} + 4{{H2O-nl}}
| 0.43
|3
|class="noprint"|
|-
| Ru
| {{chem|Ru|2+}}(''aq'') + 2{{e-}}
|⇌
| {{chem|link=Ruthenium|Ru}}
| 0.455
|2
|class="noprint"|<ref name=Greenwood1077>Greenwood and Earnshaw, p. 1077</ref>
|-
| V || {{chem2|VO(OH)+}} + 2{{H+|nolink=y}} + {{e-}} || ⇌ || {{chem|V|O|H|2+}} + {{H2O-nl}}(''l'') || 0.481 || 1 || class=noprint | <ref name=AS5/>{{rp|793}}
|-
| C
| {{chem|link=Methanol|CH|3|OH}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|link=Methane|CH|4}}(''g'') + {{H2O-nl}}
| 0.5
|2
|class="noprint"|
|-
| S
| {{chem|SO|2}}(''aq'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| S(''s'') + 2{{H2O-nl}}
| 0.5
|4
|class="noprint"|<ref name=AS5/>{{rp|790}}
|-
| S || 4{{chem|SO|2}}(''aq'') + 4{{H+|nolink=y}} + 6{{e-}} || ⇌ || S<sub>4</sub>O{{su|b=6|p=2&minus;}} + 2{{H2O-nl}}(''l'') || 0.51 || 6 || class=noprint | <ref name=Lee />
|-
| Cu
| {{chem|Cu|+}} + {{e-}}
|⇌
| Cu(''s'')
| 0.52
|1
|class="noprint"|<ref name=Bar/>
|-
| C
| [[Carbon monoxide|CO]](''g'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| C(''s'') + {{H2O-nl}}
| 0.52
|2
|class="noprint"| <ref name=AS5 />{{rp|788}}
|-
| I
| {{chem|link=Triiodide|I|3|-}} + 2{{e-}}
|⇌
| 3{{chem|I|-}}
| 0.53
|2
|class="noprint"|<ref name=Atk/>
|-
| Te || {{chem2|TeO2}}(''s'') + 4{{H+|nolink=y}} + 4{{e-}} || ⇌ || Te(''s'') + 2{{H2O-nl}}(''l'') || 0.53 || 4 || class=noprint | <ref name=AS5 />{{rp|790}}
|-
| Cu || {{chem|Cu|2+}} + {{chem2|Cl-}} + {{e-}} || ⇌ || {{chem2|CuCl}}(''s'') || 0.54 || 1 || class=noprint | <ref name=Lee />
|-
| I
| {{chem|link=Iodine|I|2}}(''s'') + 2{{e-}}
|⇌
| 2{{chem|I|-}}
| 0.54
|2
|class="noprint"|<ref name=Atk/>
|-
| Au
| {{chem|[|AuI|4|]|-}} + 3{{e-}}
|⇌
| Au(''s'') + 4{{chem|I|-}}
| 0.56
|3
|class="noprint"|
|-
| As
| {{chem|link=Arsenic acid|H|3|AsO|4}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|H|3|AsO|3}}(''aq'') + {{H2O-nl}}
| 0.56
|2
|class="noprint"|<ref name=AS5 />{{rp|789}}
|-
| S || S<sub>2</sub>O{{su|b=6|p=2&minus;}} + 4{{H+|nolink=y}} + 2{{e-}} || ⇌ || 2{{chem2|H2SO3}} || 0.569 || 2 || class=noprint | <ref name=AS5 />{{rp|790}}
|-
| Au
| {{Chem|[AuI|2|]|-}} + {{e-}}
|⇌
| Au(''s'') + 2{{Chem|I|-}}
| 0.58
|1
|class="noprint"|
|-
| Mn
| {{chem|MnO|4|-}} + 2{{H2O-nl}} + 3{{e-}}
|⇌
| {{chem|MnO|2}}(''s'') + 4{{OH-|nolink=y}}
|  0.595
|3
|class="noprint"|<ref name="CRC" />
|-
| S
| {{chem|S|2|O|3|2-}} + 6{{H+|nolink=y}} + 4{{e-}}
|⇌
| 2S(''s'') + 3{{H2O-nl}}
| 0.6
|4
|class="noprint"| <ref name=AS5/>{{rp|790}}
|-
| Fe || {{chem|link=Ferrocene|Fc|+}} + {{e-}} || ⇌ || Fc(''s'') || 0.63 || 1 || class="noprint" | Substantial literature variation<ref>{{#invoke:cite|journal|first1=Vitaly&nbsp;V.|last1=Pavlishchuk|first2=Anthony&nbsp;W.|last2=Addison|periodical=Inorganica Chimica Acta|title=Conversion constants for redox potentials measured versus different reference electrodes in acetonitrile solutions at 25°C|volume=298|issue=1|pages=97–102|date=January 2000 |doi=10.1016/S0020-1693(99)00407-7}}</ref>
|-
| Mo
| {{chem|link=Molybdic acid|H|2|MoO|4}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|MoO|2}}(''s'') + 2{{H2O-nl}}
| 0.65
|2
|class="noprint"|
|-
| N || HN<sub>3</sub>(''aq'') + 11{{H+|nolink=y}} + 8{{e-}} || ⇌ || 3NH{{su|b=4|p=+}} || 0.69 || 8 || class=noprint | <ref name=Lee />
|-
| O
| {{chem|O|2}}(''g'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|link=Hydrogen Peroxide|H|2|O|2}}(''aq'')
| 0.695
|2
|class="noprint"|<ref name="van??"/>
|-
| Sb || {{chem2|Sb2O5}}(''s'') + 4{{H+|nolink=y}} + 4{{e-}} || ⇌ || {{chem2|Sb2O3}}(''s'') + 2{{H2O-nl}} || 0.699 || 4 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| C
| [[File:1,4-Benzochinon.svg|70px|link=p-Benzoquinone]] + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| [[File:Hydrochinon2.svg|110px|link=Hydroquinone]]
| 0.6992
|2
|class="noprint"|<ref name=van/>
|-
| V || H<sub>2</sub>V<sub>10</sub>O{{su|b=28|p=4&minus;}} + 24{{H+|nolink=y}} + 10{{e-}} || ⇌ || 10{{chem2|VO(OH)+}} + 8{{H2O-nl}}(''l'') || 0.723 || 10 || class=noprint | <ref name=AS5/>{{rp|793}}
|-
| Pt
| {{chem|PtCl|6|2-}} + 2{{e-}}
|⇌
| {{chem|PtCl|4|2-}} + 2{{chem|Cl|-}}
| 0.726
|2
|class="noprint"|<ref name=Bar2/>
|-
| Fe
| {{chem|link=Hematite|Fe|2|O|3}}(s) + 6{{H+|nolink=y}} + 2{{e-}}
|⇌
| 2{{chem|link=Ferrous|Fe|2+}} + 3{{H2O-nl}}
| 0.728
|2
|class="noprint"|<ref name=Pang2007/>{{rp|p.100}}
|-
| Se
| {{chem|link=Selenous acid|H|2|SeO|3}}(''aq'') + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| Se(''s'') + 3{{H2O-nl}}
| 0.74
|4
|class="noprint"|<ref name="van??"/>
|-
| At
| AtO<sup>+</sup> + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
|At<sup>+</sup> + {{H2O-nl}}
| 0.74
|2
|class="noprint"|<ref name=":2"/>
|-
| Tl
| {{chem|Tl|3+}} + 3{{e-}}
|⇌
| Tl(''s'')
| 0.741
|3
|class="noprint"|<ref name="van??"/>
|-
| No
| {{chem|No|3+}} + {{e-}}
|⇌
| {{chem|No|2+}}
| 0.75
|1
|class="noprint"|<ref>{{#invoke:cite|journal|last1=Toyoshima |first1=A. |last2=Kasamatsu |first2=Y. |first3=K. |last3=Tsukada |first4=M. |last4=Asai |first5=Y. |last5=Kitatsuji |first6=Y. |last6=Ishii |first7=H. |last7=Toume |first8=I. |last8=Nishinaka |first9=H. |last9=Haba |first10=K. |last10=Ooe |first11=W. |last11=Sato |first12=A. |last12=Shinohara |first13=K. |last13=Akiyama |first14=Y. |last14=Nagame |date=8 July 2009 |title=Oxidation of element 102, nobelium, with flow electrolytic column chromatography on an atom-at-a-time scale |journal=Journal of the American Chemical Society |volume=131 |issue=26 |pages=9180–1 |doi=10.1021/ja9030038 |pmid=19514720 |bibcode=2009JAChS.131.9180T |url=https://figshare.com/articles/Oxidation_of_Element_102_Nobelium_with_Flow_Electrolytic_Column_Chromatography_on_an_Atom_at_a_Time_Scale/2844817 }}</ref>
|-
| Pt
| {{chem|PtCl|4|2-}} + 2{{e-}}
|⇌
| Pt(''s'') + 4{{Chem|Cl|-}}
| 0.758
|2
|class="noprint"|<ref name=Bar2/>
|-
| Br || {{chem2|BrO-}} + {{H2O-nl}}(''l'') + 2{{e-}} || ⇌ || {{chem2|Br-}} + 2{{OH-|nolink=y}} || 0.76 || 2 || class=noprint | <ref name=AS5/>{{rp|791}}
|-
|Po
|Po<sup>4+</sup> + 4{{e-}}
|⇌
|Po
|0.76
|4
|class="noprint"|<ref name="van??"/>
|-
| S
| [[thiocyanogen|(SCN)<sub>2</sub>]] + 2{{e-}}
|⇌
| 2[[thiocyanate|SCN<sup>−</sup>]]
| 0.769
|2
|class="noprint"|<ref>{{#invoke:cite|journal|journal=Archiv der Pharmazie und Berichte der Deutschen Pharmazeutischen Gesellschaft|volume=263|year=1925|via=[[HathiTrust]]|pages=675–721|url=https://babel.hathitrust.org/cgi/pt?id=uc1.b3706518|first=H.&nbsp;P.|last=Kaufmann|title=Das freie Rhodan und seine Anwendung in der Maßanalyse. Eine neue Kennzahl der Fette|issue=41–47 |doi=10.1002/ardp.19252634104 |lang=de|trans-title=Unbound rhodanium and its application to elemental analysis: A new measurement technique for fats}}</ref><ref name="van??"/>
|-
| Fe
| {{chem|Fe|3+}} + {{e-}}
|⇌
| {{chem|Fe|2+}}
| 0.771
|1
|class="noprint"|<ref name="van??"/>
|-
| Hg
| {{chem|link=Mercury (element)|Hg|2|2+}} + 2{{e-}}
|⇌
| 2Hg(''l'')
| 0.7973
|2
|class="noprint"|<ref name="van??"/>
|-
| Ag
| {{chem|link=Silver|Ag|+}} + {{e-}}
|⇌
| Ag(''s'')
| 0.7996
|1
|class="noprint"|<ref name=van/>
|-
| N
| 2[[Nitrate|{{chem|NO|3|-}}]](''aq'') + 4{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|link=Nitrogen dioxide|N|2|O|4}}(''g'') + 2{{H2O-nl}}
| 0.803
|2
|class="noprint"| <ref name=AS5 />{{rp|789}}
|-
| Fe
| 2{{chem|link=Ferrate|FeO|4|2-}} + 5{{H2O-nl}} + 6{{e-}}
|⇌
| {{chem|Fe|2|O|3}}(''s'') + 10{{OH-|nolink=y}}
| 0.81
|6
|class="noprint"|<ref name=webelements_fe/>
|-
| Au
| {{chem|[AuBr|4|]|-}} + 3{{e-}}
|⇌
| Au(''s'') + 4{{chem|Br|-}}
| 0.85
|3
|class="noprint"|
|-
| Hg
| {{chem|Hg|2+}} + 2{{e-}}
|⇌
| Hg(''l'')
| 0.85
|2
|class="noprint"|
|-
| Ir
| {{chem|[IrCl|6|]|2-}} + {{e-}}
|⇌
| {{chem|[IrCl|6|]|3-}}
| 0.87
|1
|class="noprint"|<ref name=AS5 />{{rp|153}}
|-
| Mn
| {{chem|MnO|4|-}} + {{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|HMnO|4|-}}
| 0.9
|1
|class="noprint"|
|-
|Po
|Po<sup>4+</sup> + 2{{e-}}
|⇌
|Po<sup>2+</sup>
|0.9
|2
|class="noprint"|<ref name="van??"/>
|-
| Hg
| 2{{chem|Hg|2+}} + 2{{e-}}
|⇌
| {{chem|Hg|2|2+}}
| 0.91
|2
|class="noprint"|<ref name=Bar/>
|-
| Pd
| {{chem|link=Palladium|Pd|2+}} + 2{{e-}}
|⇌
| Pd(''s'')
| 0.915
|2
|class="noprint"|<ref name=Bar2/>
|-
| Au
| {{chem|[AuCl|4|]|-}} + 3{{e-}}
|⇌
| Au(''s'') + 4{{chem|Cl|-}}
| 0.93
|3
|class="noprint"|
|-
| N || NO{{su|b=3|p=&minus;}} + 3{{H+|nolink=y}} + 2{{e-}} || ⇌ || {{chem2|HNO2}}(''aq'') || 0.94 || 2 || class=noprint | <ref name=AS5/>{{rp|789}}
|-
| Mn
| {{chem|MnO|2}}(''s'') + 4{{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|Mn|3+}} + 2{{H2O-nl}}
| 0.95
|1
|class="noprint"|
|-
| N
| {{chem|link=Nitrate|NO|3|-}}(''aq'') + 4{{H+|nolink=y}} + 3{{e-}}
|⇌
| [[Nitrogen monoxide|NO]](''g'') + 2{{H2O-nl}}(''l'')
|0.958
|3
|class="noprint"|<ref name="Atk" />
|-
| Au
| {{Chem|[AuBr|2|]|-}} + {{e-}}
|⇌
| Au(''s'') + 2{{Chem|Br|-}}
| 0.96
|1
|class="noprint"|
|-
| Fe
| [[Magnetite|{{chem|Fe|3|O|4}}]](s) + 8{{H+|nolink=y}} + 2{{e-}}
|⇌
| 3{{chem|link=Ferrous|Fe|2+}} + 4{{H2O-nl}}
| 0.98
|2
|class="noprint"|<ref name=Pang2007/>{{rp|p.100}}
|-
| Xe
| {{chem|[HXeO|6|]|3-}} + 2{{H2O-nl}} + 2{{e-}}
|⇌
| {{chem|[HXeO|4|]|-}} + 4{{OH-|nolink=y}}
| 0.99
|2
|class="noprint"|<ref name=AS5/>{{rp|792}}<ref name=webelements_xe>{{#invoke:cite|web|title=compounds information |work=Xenon |publisher=WebElements Periodic Table of the Elements |url=http://www.webelements.com/xenon/compounds.html}}</ref>
|-
| N || {{chem2|HNO2}}(''aq'') + {{H+|nolink=y}} + {{e-}} || ⇌ || NO(''g'') + {{H2O-nl}}(''l'') || 0.996 || 1 || class=noprint | <ref name=AS5/>{{rp|789}}
|-
| At
| HAtO + {{H+|nolink=y}} + {{e-}}
|⇌
| At + {{H2O-nl}}
|1.0
|1
|class="noprint"|<ref name=":0"/>
|-
| V
| {{chem|[VO|2|]|+}}(''aq'') + 2{{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|link=Vanadyl ion|[VO]|2+}}(''aq'') + {{H2O-nl}}
| 1
|1
|class="noprint"|<ref name = "Cotton">{{Cotton&Wilkinson6th}}.</ref>
|-
| Te
| {{chem|link=Telluric acid|H|6|TeO|6}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|TeO|2}}(''s'') + 4{{H2O-nl}}
| 1.02
|2
|class="noprint"|<ref name = "Cotton">{{Cotton&Wilkinson6th}}.</ref>
|-
| N || NO<sub>2</sub>(''g'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || NO(''g'') + H<sub>2</sub>O(''l'') || 1.03 || 2 || class=noprint | <ref name=Lee />
|-
| Br || Br{{su|b=3|p=&minus;}} + 2{{e-}} || ⇌ || 3{{chem|Br|-}} || 1.05 || 2 || class=noprint | <ref name=Lee />
|-
| Sb || {{chem2|Sb2O5}}(''s'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || {{chem2|Sb2O4}}(''s'') + {{H2O-nl}}(''l'') || 1.055 || 2 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| I || ICl{{su|b=2|p=&minus;}} + {{e-}} || ⇌ || 2{{chem|Cl|-}} + I(''s'') || 1.06 || 1 || class=noprint | <ref name=Lee />
|-
| Br
| {{chem|link=Bromine|Br|2}}(''l'') + 2{{e-}}
|⇌
| 2{{Chem|Br|-}}
| 1.066
|2
|class="noprint"|<ref name=van/>
|-
| N || {{chem2|N2O4}}(''g'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || 2{{chem2|HNO2}} || 1.07 || 2 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Br
| {{chem|link=Bromine|Br|2}}(''aq'') + 2{{e-}}
|⇌
| 2{{chem|Br|-}}
| 1.0873
|2
|class="noprint"|<ref name=van/>
|-
| Ru
| {{chem|RuO|2}} + 4{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|Ru|2+}}(''aq'') + 2{{H2O-nl}}
| 1.120
|2
|class="noprint"|<ref name=Greenwood1077 />
|-
|Cu
| {{Chem|Cu|2+}} + 2{{Chem|CN|-}} + {{E-}}
|⇌
| {{Chem|Cu(CN)|2|-}}
| 1.12
|1
|class="noprint"|<ref name="Bar" />
|-
| I
| {{chem|IO|3|-}} + 5{{H+|nolink=y}} + 4{{e-}}
|⇌
| HIO(''aq'') + 2{{H2O-nl}}
| 1.13
|4
|class="noprint"|<ref name=AS5/>{{rp|791}}
|-
| O || {{chem2|H2O2}}(''aq'') + {{H+|nolink=y}} + {{e-}} || ⇌ || {{H2O-nl}}(''l'') + {{chem2|HO•}} || 1.14 || 1 || class=noprint | <ref name=AS5/>{{rp|790}}
|-
| Au
| {{Chem|[AuCl|2|]|-}} + {{e-}}
|⇌
| Au(''s'') + 2{{Chem|Cl|-}}
| 1.15
|1
|class="noprint"|
|-
| Se
| {{chem|HSeO|4|−}} + 3{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|H|2|SeO|3}}(''aq'') + {{H2O-nl}}
| 1.15
|2
|class="noprint"|<ref name=AS5/>{{rp|790}}
|-
| Ag
| {{chem|link=Silver oxide|Ag|2|O}}(''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| 2Ag(''s'') + {{H2O-nl}}
| 1.17
|2
|class="noprint"|
|-
| Cl
| {{chem|ClO|3|-}} + 2{{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|link=Chlorine dioxide|ClO|2}}(''g'') + {{H2O-nl}}
| 1.175
|1
|class="noprint"|<ref name=AS5/>{{rp|791}}
|-
| Xe
| {{chem|[HXeO|6|]|3-}} + 5{{H2O-nl}} + 8{{e-}}
|⇌
| Xe(''g'') + 11{{OH-|nolink=y}}
| 1.18
|8
|class="noprint"|<ref name=webelements_xe/>
|-
| Pt
| {{chem|link=Platinum|Pt|2+}} + 2{{e-}}
|⇌
| Pt(''s'')
| 1.188
|2
|class="noprint"|<ref name=Bar2/>
|-
| Cl
| {{chem|ClO|2}}(''g'') + {{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|HClO|2}}(''aq'')
| 1.19
|1
|class="noprint"| <ref name=AP />
|-
| I
| 2{{chem|IO|3|−}} + 12{{H+|nolink=y}} + 10{{e-}}
|⇌
| {{chem|link=Iodine|I|2}}(''s'') + 6{{H2O-nl}}
| 1.2
|10
|class="noprint"| <ref name=Lee />
|-
| Mn
| {{chem|link=Manganese dioxide|MnO|2}}(''s'') + 4{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|Mn|2+}} + 2{{H2O-nl}}
| 1.224
|2
|class="noprint"|<ref name=van/>
|-
| '''O'''
| '''{{chem|O|2}}(''g'') + 4{{H+|nolink=y}} + 4{{e-}}'''
|⇌
| '''2{{H2O-nl}}'''
| '''1.229'''
|'''4'''
|class="noprint"|<ref name=Atk/>
|-
| N || N<sub>2</sub>H{{su|b=5|p=+}} + 3{{H+|nolink=y}} + 2{{e-}} || ⇌ || 2NH{{su|b=4|p=+}} || 1.28 || 2 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Cl
| {{chem|ClO|4|−}} + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|ClO|3|−}} + {{H2O-nl}}
| 1.23
|2
|class="noprint"|<ref name=":1"/>
|-
| Ru
| {{chem|[Ru(bipy)|3|]|3+}} + {{e-}}
|⇌
| {{chem|link=Tris(bipyridine)ruthenium(II) chloride|[Ru(bipy)|3|]|2+}}
| 1.24
|1
|class="noprint"|<ref name="CRC" />
|-
| Xe
| {{chem|[HXeO|4|]|-}} + 3{{H2O-nl}} + 6{{e-}}
|⇌
| Xe(''g'') + 7{{OH-|nolink=y}}
| 1.24
|6
|class="noprint"|<ref name=AS5/>{{rp|792}}<ref name=webelements_xe/>
|-
| N || 2NO{{su|b=3|p=&minus;}} + 12{{H+|nolink=y}} + 10{{e-}} || ⇌ || {{chem2|N2}}(''g'') + 6{{H2O-nl}}(''l'') || 1.25 || 10 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Tl
| {{chem|Tl|3+}} + 2{{e-}}
|⇌
| {{Chem|Tl|+}}
| 1.25
|2
|class="noprint"| <ref name=AS5 />{{rp|788}}
|-
| N || 2{{chem2|HNO2}}(''aq'') + 4{{H+|nolink=y}} + 4{{e-}} || ⇌ || {{chem2|N2O}}(''g'') + 3{{H2O-nl}}(''l'') || 1.297 || 4 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Cr
| {{chem|Cr|2|O|7|2−}} + 14{{H+|nolink=y}} + 6{{e-}}
|⇌
| 2{{chem|Cr|3+}} + 7{{H2O-nl}}
| 1.33
|6
|class="noprint"| <ref name=Gre/>{{rp|1005}}
|-
| N || {{chem2|NH3OH+}} + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || NH{{su|b=4|p=+}} + {{H2O-nl}}(''l'') || 1.35 || 2 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Cl
| {{chem|link=Chlorine|Cl|2}}(''g'') + 2{{e-}}
|⇌
| 2{{Chem|Cl|-}}
| 1.36
|2
|class="noprint"|<ref name=Atk/>
|-
| Ru
| {{chem|RuO|4|-}}(''aq'') + 8{{H+|nolink=y}} + 5{{e-}}
|⇌
| {{chem|Ru|2+}}(''aq'') + 4{{H2O-nl}}
| 1.368
|5
|class="noprint"|<ref name=Greenwood1077 />
|-
| Ru
| {{chem|link=Ruthenium tetroxide|RuO|4}} + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| {{chem|link=Ruthenium dioxide|RuO|2}} + 2{{H2O-nl}}
| 1.387
|4
|class="noprint"|<ref name=Greenwood1077 />
|-
| Co
| {{chem|CoO|2}}(''s'') + 4{{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|Co|3+}} + 2{{H2O-nl}}
| 1.42
|1
|class="noprint"|
|-
| N
| 2[[Hydroxylamine|{{chem|NH|3|OH|+}}]] + {{H+|nolink=y}} + 2{{e-}}
|⇌
| [[Hydrazine|{{chem|N|2|H|5|+}}]] + 2{{H2O-nl}}
| 1.42
|2
|class="noprint"|<ref name=Gre/>
|-
| I
| 2[[Hypoiodous acid|HIO]](''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|I|2}}(''s'') + 2{{H2O-nl}}
| 1.44
|2
|class="noprint"|<ref name=AS5/>{{rp|791}}
|-
| Br
| {{chem|BrO|3|−}} + 5{{H+|nolink=y}} + 4{{e-}}
|⇌
| HBrO(''aq'') + 2{{H2O-nl}}
| 1.447
|4
|class="noprint"|<ref name=AS5 />{{rp|791}}
|-
| Pb
| {{chem|link=Lead dioxide|β-PbO|2}}(''s'') + 4{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|Pb|2+}} + 2{{H2O-nl}}
| 1.46
|2
|class="noprint"|<ref name=Bar/>
|-
| Pb
| {{chem|link=Lead dioxide|α-PbO|2}}(''s'') + 4{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|Pb|2+}} + 2{{H2O-nl}}
| 1.468
|2
|class="noprint"|<ref name=Bar/>
|-
| Br
| 2{{chem|BrO|3|−}} + 12{{H+|nolink=y}} + 10{{e-}}
|⇌
| {{chem|Br|2}}(''l'') + 6{{H2O-nl}}
| 1.48
|10
|class="noprint"|
|-
| At
| HAtO<sub>3</sub> + 4{{H+|nolink=y}} + 4{{e-}}
|⇌
| HAtO + 2{{H2O-nl}}
|1.5
|4
|class="noprint"|<ref name=":0"/>
|-
| Mn
| {{chem|MnO|4|-}} + 8{{H+|nolink=y}} + 5{{e-}}
|⇌
| {{chem|Mn|2+}} + 4{{H2O-nl}}
| 1.51
|5
|class="noprint"| <ref name=Lee />
|-
| O
| {{chem|HO|2|•}} + {{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|link=Hydrogen peroxide|H|2|O|2}}(''aq'')
| 1.51
|1
|class="noprint"|
|-
| Au
| {{chem|Au|3+}} + 3{{e-}}
|⇌
| Au(''s'')
| 1.52
|3
|class="noprint"|
|-
| Ru
| {{chem|RuO|4|2-}}(''aq'') + 8{{H+|nolink=y}} + 4{{e-}}
|⇌
| {{chem|Ru|2+}}(''aq'') + 4{{H2O-nl}}
| 1.563
|4
|class="noprint"|<ref name=Greenwood1077 />
|-
| N || 2NO(''g'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || {{chem2|N2O}}(''g'') + {{H2O-nl}}(''l'') || 1.59 || 2 || class=noprint | <ref name=AS5 />{{rp|789}}
|-
| Ni
| {{chem|NiO|2}}(''s'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|Ni|2+}} + 2{{OH-|nolink=y}}
| 1.59
|2
|class="noprint"|
|-
| Ce
| {{chem|Ce|4+}} + {{e-}}
|⇌
| {{chem|Ce|3+}}
| 1.61
|1
|class="noprint"|
|-
| Cl
| 2HClO(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|Cl|2}}(''g'') + 2{{H2O-nl}}
| 1.63
|2
|class="noprint"| <ref name=AP />
|-
| I
| {{chem|IO|4|−}} + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|IO|3|−}} + {{H2O-nl}}
| 1.64
|2
|class="noprint"|<ref name=":1"/>
|-
| Ag
| {{chem|Ag|2|O|3}}(''s'') + 6{{H+|nolink=y}} + 4{{e-}}
|⇌
| 2{{chem|Ag|+}} + 3{{H2O-nl}}
| 1.67
|4
|class="noprint"|
|-
| Cl
| {{chem|link=Chlorous acid|HClO|2}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| HClO(''aq'') + {{H2O-nl}}
| 1.67
|2
|class="noprint"| <ref name=AP />
|-
| Pb
| {{chem|Pb|4+}} + 2{{e-}}
|⇌
| {{chem|Pb|2+}}
| 1.69
|2
|class="noprint"|<ref name=Bar/>
|-
| Mn
| [[permanganate|{{chem|MnO|4|−}}]] + 4{{H+|nolink=y}} + 3{{e-}}
|⇌
| {{chem|link=Manganese(IV) oxide|MnO|2}}(''s'') + 2{{H2O-nl}}
| 1.7
|3
|class="noprint"| <ref name=Lee />
|-
| Br
| {{chem|BrO|4|−}} + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|BrO|3|−}} + {{H2O-nl}}
| 1.74
|2
|class="noprint"|<ref name=":1">{{#invoke:cite|journal| last=Appelman | first=Evan H. | title=Nonexistent compounds. Two case histories | journal=Accounts of Chemical Research | publisher=American Chemical Society (ACS) | volume=6 | issue=4 | date=1973-04-01 | issn=0001-4842 | doi=10.1021/ar50064a001 | pages=113–117}}</ref>
|-
| Ag
| AgO(''s'') + 2{{H+|nolink=y}} + {{e-}}
|⇌
| {{chem|Ag|+}} + {{H2O-nl}}
| 1.77
|1
|class="noprint"|
|-
| N || {{chem2|N2O}}(''g'') + 2{{H+|nolink=y}} + 2{{e-}} || ⇌ || {{chem2|N2}}(''g'') + {{H2O-nl}}(''l'') || 1.77 || 2 || <ref name=AS5 />{{rp|789}}
|-
| O
| [[Hydrogen peroxide|{{chem|H|2|O|2}}]](''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| 2{{H2O-nl}}
| 1.78
|2
|class="noprint"| <ref name=AP />
|-
| Au
| {{chem|Au|+}} + {{e-}}
|⇌
| Au(''s'')
| 1.83
|1
|class="noprint"|<ref name=Bar/>
|-
| Co
| {{chem|Co|3+}} + {{e-}}
|⇌
| {{chem|Co|2+}}
| 1.92
|1
|class="noprint"|<ref name="van??"/>
|-
| Ag
| {{chem|Ag|2+}} + {{e-}}
|⇌
| {{chem|Ag|+}}
| 1.98
|1
|class="noprint"|<ref name=Bar/>
|-
| O
| {{chem|link=Peroxodisulfate|S|2|O|8|2-}} + 2{{e-}}
|⇌
| 2[[sulfate|{{chem|SO|4|2-}}]]
| 2.01
|2
|class="noprint"|<ref name=van/>
|-
| O
| {{chem|link=Ozone|O|3}}(''g'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|O|2}}(''g'') + {{H2O-nl}}
| 2.075
|2
|class="noprint"|<ref name=Bar2/>
|-
| Mn
| {{chem|HMnO|4|−}} + 3{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|MnO|2}}(''s'') + 2{{H2O-nl}}
| 2.09
|2
|class="noprint"|
|-
| Xe
| {{chem|XeO|3}}(''aq'') + 6{{H+|nolink=y}} + 6{{e-}}
|⇌
| Xe(''g'') + 3{{H2O-nl}}
| 2.12
|6
|class="noprint"|<ref name=AS5/>{{rp|792}}<ref name=webelements_xe/>
|-
| Xe
| {{chem|H|4|XeO|6}}(''aq'') + 8{{H+|nolink=y}} + 8{{e-}}
|⇌
| Xe(''g'') + 6{{H2O-nl}}
| 2.18
|8
|class="noprint"|<ref name=AS5/>{{rp|792}}<ref name=webelements_xe/>
|-
| Fe
| [[Ferrate|{{chem|FeO|4|2−}}]] + 8{{H+|nolink=y}} + 3{{E-}}
|⇌
| {{chem|Fe|3+}} + 4{{H2O-nl}}
| 2.2
|3
|class="noprint"|<ref name=wou>{{#invoke:cite|web|first=Arlene |last=Courtney  |title=Oxidation Reduction Chemistry of the Elements |work=Ch 412 Advanced Inorganic Chemistry: Reading Materials |publisher=Western Oregon University |url=https://people.wou.edu/~courtna/ch412/redox.htm}}</ref>
|-
| Xe
| {{chem|XeF|2}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| Xe(''g'') + 2HF(''aq'')
| 2.32
|2
|class="noprint"|<ref name=webelements_xe/><ref name=AP />
|-
| O || {{chem2|HO•}} + {{H+|nolink=y}} + {{e-}} || ⇌ || {{H2O-nl}}(''l'') || 2.38 || 1 || class=noprint | <ref name=AS5 />{{rp|790}}
|-
| Xe
| {{chem|H|4|XeO|6}}(''aq'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| {{chem|XeO|3}}(''aq'') + 3{{H2O-nl}}
| 2.42
|2
|class="noprint"|<ref name=webelements_xe/><ref name=AS5/>{{rp|792}}
|-
| F
| {{chem|link=Fluorine|F|2}}(''g'') + 2{{e-}}
|⇌
| 2{{Chem|F|-}}
| 2.87
|2
|class="noprint"|<ref name=AS5 />{{rp|153}}<ref name=Atk/><ref name=Bar/>
|-
|Cm
|Cm<sup>4+</sup> + ''e<sup>–</sup>''
|⇌
|Cm<sup>3+</sup>
|3.0
|1
|class="noprint"|Estimated<ref name=VanSrc/>
|-
| F
| {{chem|link=Fluorine|F|2}}(''g'') + 2{{H+|nolink=y}} + 2{{e-}}
|⇌
| 2HF(''aq'')
| 3.077
|2
|class="noprint"|<ref name="VanSrc" />
|-
|Tb
|Tb<sup>4+</sup> + ''e<sup>–</sup>''
|⇌
|Tb<sup>3+</sup>
|3.1
|1
|class="noprint"|Estimated<ref name="VanSrc" />
|-
|Pr
|Pr<sup>4+</sup> + ''e<sup>–</sup>''
|⇌
|Pr<sup>3+</sup>
|3.2
|1
|class="noprint"|Estimated<ref name="VanSrc" />
|-
| Kr
| {{chem|link=Krypton difluoride|KrF|2}}(''aq'') + 2{{e-}}
|⇌
| Kr(''g'') + 2{{Chem|F|-}}(''aq'')
| 3.27
|2
|class="noprint"| Estimated<ref>{{#invoke:cite|journal|first1=P.J. |last1=Leszczyński |first2=W. |last2=Grochala |title=Strong Cationic Oxidizers: Thermal Decomposition, Electronic Structure and Magnetism of Their Compounds |journal=Acta Chim. Slov. |volume=60 |issue=3 |pages=455–470 |year=2013 |pmid=24169699 |url=http://acta-arhiv.chem-soc.si/60/60-3-455.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://acta-arhiv.chem-soc.si/60/60-3-455.pdf |archive-date=2022-10-09 |url-status=live}}
</ref>
|}

== See also ==
* [[Galvanic series]] lists [[electrode potential]]s in saltwater
* [[Table of standard reduction potentials for half-reactions important in biochemistry|Standard apparent reduction potentials in biochemistry at pH 7]]
* [[Reactivity series#Comparison with standard electrode potentials]]

== Notes ==
<templatestyles src="Reflist/styles.css" /><div class="reflist"><references group="note" responsive="1">
<ref name=rwP group=note>Not specified in the indicated reference, but assumed due to the difference between the value −0.454 and that computed by (2×(−0.499) + (−0.508))/3 = −0.502, exactly matching the difference between the values for white (−0.063) and red (−0.111) phosphorus in equilibrium with PH<sub>3</sub>.</ref>
</references></div>

== References ==
<references>
<ref name=Bar>{{#invoke:cite|book|first1=Allen J. |last1=Bard |first2=Roger |last2=Parsons |first3=Joseph |last3=Jordan |title=Standard Potentials in Aqueous Solution |url=https://books.google.com/books?id=fuJV1H18KtEC |date=1985 |publisher=CRC Press |isbn=978-0-8247-7291-8 }}</ref>
<ref name=van>{{#invoke:cite|book|last= Vanýsek |first=Petr |year=2012 |editor-last=Haynes |editor-first=William M. |chapter= Electrochemical Series |pages=5–80 |title= Handbook of Chemistry and Physics |edition=93rd |publisher=CRC Press |chapter-url=https://books.google.com/books?id=-BzP7Rkl7WkC&pg=SA5-PA80 |isbn=9781439880494}}</ref>
<ref name=van92>{{#invoke:cite|book|last=Vanýsek |first=Petr |chapter=Electrochemical Series |editor-first=William M. |editor-last=Haynes |title=CRC Handbook of Chemistry and Physics |chapter-url=https://books.google.com/books?id=pYPRBQAAQBAJ&pg=SA5-PA80 |date=2011 |publisher=CRC Press |isbn=978-1-4398-5512-6 |pages=5–80–9 |edition=92nd}}</ref>
<ref name="van??">{{#invoke:cite|web|author=Petr Vanysek|title=Electrochemical series|website=depa.fquim.unam.mx |url=http://depa.fquim.unam.mx/amyd/archivero/TablasdepotencialesREDOX_26700.pdf |archive-url=https://web.archive.org/web/20210916165426/http://depa.fquim.unam.mx/amyd/archivero/TablasdepotencialesREDOX_26700.pdf|archive-date=2021-09-16 |url-status=dead}}</ref>
<ref name=VanSrc>{{#invoke:cite|journal|last=Bratsch |first=Stephen&nbsp;G. |date=July 29, 1988 |orig-date=1 March 1988 |title=Standard electrode potentials and temperature coefficients in water at 298.15&nbsp;K |url=https://srd.nist.gov/jpcrdreprint/1.555839.pdf |journal=Journal of Physical and Chemical Reference Data |publisher=American Institute of Physics |publication-date=1989 |volume=18 |issue=1 |pages=1–21 |doi=10.1063/1.555839 |bibcode=1989JPCRD..18....1B |via=NIST}}</ref>
<ref name=Gre>{{Greenwood&Earnshaw}}</ref>
<ref name=Bar2>{{#invoke:cite|book|last1=Bard |first1=A.J. |last2=Faulkner |first2=L.R. |title=Electrochemical Methods. Fundamentals and Applications |publisher=Wiley |year=2001 |isbn=9781118312803 |edition=2nd}}</ref>
<ref name=Pou>{{#invoke:cite|book|first=Marcel |last=Pourbaix |year=1966 |title=Atlas of Electrochemical Equilibria in Aqueous Solutions |publisher=NACE International |location=Houston, Texas; Cebelcor, Brussels |oclc=475102548}}</ref>
<ref name=Atk>{{#invoke:cite|book|first=Peter W. |last=Atkins |title=Physical Chemistry |publisher=W.H. Freeman |year=1997 |isbn=9780716734659 |edition=6th}}</ref>
<ref name=AS5>{{#invoke:cite|book|last1=Atkins |first1=Peter |last2=Overton |first2=Tina |last3=Rourke |first3=Jonathan |last4=Weller |first4=Mark |last5=Armstrong |first5=Fraser |last6=Hagerman |first6=Michael |title=Inorganic Chemistry |edition=5th |year=2010 |publisher=W. H. Freeman |location=New York |isbn= 978-1-42-921820-7}}</ref>
<ref name=si>{{#invoke:cite|book|first1=Gordon |last1=Aylward |first2=Tristan |last2=Findlay |title=SI Chemical Data |publisher=Wiley |year=2008 |isbn=978-0-470-81638-7 |edition=6th}}</ref>
<ref name="Pang2007">{{#invoke:cite|journal|last1=Pang |first1=Suh Cem |last2=Chin |first2=Suk Fun |last3= Anderson |first3= Marc A. |date= July 2007 |title= Redox equilibria of iron oxides in aqueous-based magnetite dispersions: Effect of pH and redox potential |url= https://www.academia.edu/9254087 |journal= J. Colloid Interface Sci. |volume= 311 |issue=1 |pages= 94–101 |doi= 10.1016/j.jcis.2007.02.058|pmid= 17395194 |access-date= 2017-03-26 |bibcode=2007JCIS..311...94P }}</ref>
<ref name=Lee>{{#invoke:cite|book|title=A New Concise Inorganic Chemistry|edition=3rd|first=J.&nbsp;L.|last=Lee|publisher=English Language Book Society & Van Nostrand Reinhold (UK)|location=London / Wokingham, Berkshire|orig-date=1977|year=1983|isbn=0-442-30179-0|page=107|ol=4079768W|via=the [[Internet Archive]]}}</ref>
<ref name=AP>{{#invoke:cite|book|title=Arrow Pushing in Inorganic Chemistry: A logical approach to the chemistry of the main-group elements|first1=Abhik|last1=Ghosh|first2=Steffen|last2=Berg|publisher=Wiley|year=2014|location=Hoboken|isbn=978-1-118-17398-5|page=12}}</ref>
</references>

==External links==
* {{#invoke:cite|web|title=P1: Standard Reduction Potentials by Element |author=Chemistry LibreTexts |work=Chemistry LibreTexts |date=2021-04-26 |access-date=2021-11-30 |url= https://chem.libretexts.org/Ancillary_Materials/Reference/Reference_Tables/Electrochemistry_Tables/P1%3A_Standard_Reduction_Potentials_by_Element}}
* {{#invoke:cite|web|title=Standard Reduction Potentials |author=California State University, Northridge (CSUN) |work=csun.edu |date= |access-date=2021-11-30 |url= https://www.csun.edu/~hcchm003/321/Ered.pdf |archive-url=https://web.archive.org/web/20171215093555/http://www.csun.edu/~hcchm003/321/Ered.pdf |archive-date=2017-12-15 |url-status=live |language=English}}
* {{#invoke:cite|web|title=Reduction potentials of one-electron couples involving free radicals in aqueous solution |last1=Wardman |first1=Peter |work=srd.nist.gov |year=1989 |volume=18 |issue=4 |page=1637 |doi=10.1063/1.555843 |bibcode=1989JPCRD..18.1637W |access-date=2021-11-30 |url= https://srd.nist.gov/JPCRD/jpcrd372.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://srd.nist.gov/JPCRD/jpcrd372.pdf |archive-date=2022-10-09 |url-status=live |language=English}}
* http://www.jesuitnola.org/upload/clark/Refs/red_pot.htm {{Webarchive|url=https://web.archive.org/web/20080720062116/http://www.jesuitnola.org/upload/clark/Refs/red_pot.htm |date=2008-07-20 }}
* https://web.archive.org/web/20150924015049/http://www.fptl.ru/biblioteka/spravo4niki/handbook-of-Chemistry-and-Physics.pdf
* http://hyperphysics.phy-astr.gsu.edu/Hbase/tables/electpot.html#c1

{{DEFAULTSORT:Standard Electrode Potentials}}
[[Category:Electrochemistry]]
[[Category:Electrochemical potentials]]
[[Category:Chemistry-related lists]]