# Standard electrode potentials (reduction half-reactions)

| # | Element | Half-reaction | Oxidant | Reductant | E° (V) | Electrons | Estimated |
| ---: | --- | --- | --- | --- | ---: | ---: | --- |
| 1 | Sr | Sr⁺ + e⁻ ⇌ Sr(s) | Sr⁺ + e⁻ | Sr(s) | -4.101 | 1 | false |
| 2 | Ca | Ca⁺ + e⁻ ⇌ Ca(s) | Ca⁺ + e⁻ | Ca(s) | -3.8 | 1 | false |
| 3 | Th | Th⁴⁺ + e⁻ ⇌ Th³⁺ | Th⁴⁺ + e⁻ | Th³⁺ | -3.6 | 1 | false |
| 4 | Pr | Pr³⁺ + e⁻ ⇌ Pr²⁺ | Pr³⁺ + e⁻ | Pr²⁺ | -3.1 | 1 | true |
| 5 | N | 3 N₂(g) + 2 H⁺ + 2 e⁻ ⇌ 2 HN₃(aq) | 3 N₂(g) + 2 H⁺ + 2 e⁻ | 2 HN₃(aq) | -3.09 | 2 | false |
| 6 | Li | Li⁺ + e⁻ ⇌ Li(s) | Li⁺ + e⁻ | Li(s) | -3.0401 | 1 | false |
| 7 | N | N₂(g) + 4 H₂O + 2 e⁻ ⇌ 2 NH₂OH(aq) + 2 OH⁻ | N₂(g) + 4 H₂O + 2 e⁻ | 2 NH₂OH(aq) + 2 OH⁻ | -3.04 | 2 | false |
| 8 | Cs | Cs⁺ + e⁻ ⇌ Cs(s) | Cs⁺ + e⁻ | Cs(s) | -3.026 | 1 | false |
| 9 | Ca | Ca(OH)₂ + 2 e⁻ ⇌ Ca(s) + 2 OH⁻ | Ca(OH)₂ + 2 e⁻ | Ca(s) + 2 OH⁻ | -3.02 | 2 | false |
| 10 | Er | Er³⁺ + e⁻ ⇌ Er²⁺ | Er³⁺ + e⁻ | Er²⁺ | -3 | 1 | false |
| 11 | Ba | Ba(OH)₂ + 2 e⁻ ⇌ Ba(s) + 2 OH⁻ | Ba(OH)₂ + 2 e⁻ | Ba(s) + 2 OH⁻ | -2.99 | 2 | false |
| 12 | Rb | Rb⁺ + e⁻ ⇌ Rb(s) | Rb⁺ + e⁻ | Rb(s) | -2.98 | 1 | false |
| 13 | K | K⁺ + e⁻ ⇌ K(s) | K⁺ + e⁻ | K(s) | -2.931 | 1 | false |
| 14 | Ba | Ba²⁺ + 2 e⁻ ⇌ Ba(s) | Ba²⁺ + 2 e⁻ | Ba(s) | -2.912 | 2 | false |
| 15 | La | La(OH)₃(s) + 3 e⁻ ⇌ La(s) + 3 OH⁻ | La(OH)₃(s) + 3 e⁻ | La(s) + 3 OH⁻ | -2.9 | 3 | false |
| 16 | Fr | Fr⁺ + e⁻ ⇌ Fr(s) | Fr⁺ + e⁻ | Fr(s) | -2.9 | 1 | false |
| 17 | Sr | Sr²⁺ + 2 e⁻ ⇌ Sr(s) | Sr²⁺ + 2 e⁻ | Sr(s) | -2.899 | 2 | false |
| 18 | Sr | Sr(OH)₂ + 2 e⁻ ⇌ Sr(s) + 2 OH⁻ | Sr(OH)₂ + 2 e⁻ | Sr(s) + 2 OH⁻ | -2.88 | 2 | false |
| 19 | Ca | Ca²⁺ + 2 e⁻ ⇌ Ca(s) | Ca²⁺ + 2 e⁻ | Ca(s) | -2.868 | 2 | false |
| 20 | Li | Li⁺ + C₆(s) + e⁻ ⇌ LiC₆(s) | Li⁺ + C₆(s) + e⁻ | LiC₆(s) | -2.84 | 1 | false |
| 21 | Eu | Eu²⁺ + 2 e⁻ ⇌ Eu(s) | Eu²⁺ + 2 e⁻ | Eu(s) | -2.812 | 2 | false |
| 22 | Ra | Ra²⁺ + 2 e⁻ ⇌ Ra(s) | Ra²⁺ + 2 e⁻ | Ra(s) | -2.8 | 2 | false |
| 23 | Ho | Ho³⁺ + e⁻ ⇌ Ho²⁺ | Ho³⁺ + e⁻ | Ho²⁺ | -2.8 | 1 | false |
| 24 | Bk | Bk³⁺ + e⁻ ⇌ Bk²⁺ | Bk³⁺ + e⁻ | Bk²⁺ | -2.8 | 1 | false |
| 25 | Yb | Yb²⁺ + 2 e⁻ ⇌ Yb(s) | Yb²⁺ + 2 e⁻ | Yb(s) | -2.76 | 2 | false |
| 26 | Na | Na⁺ + e⁻ ⇌ Na(s) | Na⁺ + e⁻ | Na(s) | -2.71 | 1 | false |
| 27 | Mg | Mg⁺ + e⁻ ⇌ Mg(s) | Mg⁺ + e⁻ | Mg(s) | -2.7 | 1 | false |
| 28 | Nd | Nd³⁺ + e⁻ ⇌ Nd²⁺ | Nd³⁺ + e⁻ | Nd²⁺ | -2.7 | 1 | false |
| 29 | Mg | Mg(OH)₂ + 2 e⁻ ⇌ Mg(s) + 2 OH⁻ | Mg(OH)₂ + 2 e⁻ | Mg(s) + 2 OH⁻ | -2.69 | 2 | false |
| 30 | Sm | Sm²⁺ + 2 e⁻ ⇌ Sm(s) | Sm²⁺ + 2 e⁻ | Sm(s) | -2.68 | 2 | false |
| 31 | Be | Be₂O₃²⁻ + 3 H₂O + 4 e⁻ ⇌ 2 Be(s) + 6 OH⁻ | Be₂O₃²⁻ + 3 H₂O + 4 e⁻ | 2 Be(s) + 6 OH⁻ | -2.63 | 4 | false |
| 32 | Pm | Pm³⁺ + e⁻ ⇌ Pm²⁺ | Pm³⁺ + e⁻ | Pm²⁺ | -2.6 | 1 | false |
| 33 | Dy | Dy³⁺ + e⁻ ⇌ Dy²⁺ | Dy³⁺ + e⁻ | Dy²⁺ | -2.6 | 1 | false |
| 34 | No | No²⁺ + 2 e⁻ ⇌ No(s) | No²⁺ + 2 e⁻ | No(s) | -2.5 | 2 | false |
| 35 | Hf | HfO(OH)₂ + H₂O + 4 e⁻ ⇌ Hf(s) + 4 OH⁻ | HfO(OH)₂ + H₂O + 4 e⁻ | Hf(s) + 4 OH⁻ | -2.5 | 4 | false |
| 36 | Th | Th(OH)₄ + 4 e⁻ ⇌ Th(s) + 4 OH⁻ | Th(OH)₄ + 4 e⁻ | Th(s) + 4 OH⁻ | -2.48 | 4 | false |
| 37 | Md | Md²⁺ + 2 e⁻ ⇌ Md(s) | Md²⁺ + 2 e⁻ | Md(s) | -2.4 | 2 | false |
| 38 | Tm | Tm²⁺ + 2 e⁻ ⇌ Tm(s) | Tm²⁺ + 2 e⁻ | Tm(s) | -2.4 | 2 | false |
| 39 | La | La³⁺ + 3 e⁻ ⇌ La(s) | La³⁺ + 3 e⁻ | La(s) | -2.379 | 3 | false |
| 40 | Y | Y³⁺ + 3 e⁻ ⇌ Y(s) | Y³⁺ + 3 e⁻ | Y(s) | -2.372 | 3 | false |
| 41 | Mg | Mg²⁺ + 2 e⁻ ⇌ Mg(s) | Mg²⁺ + 2 e⁻ | Mg(s) | -2.372 | 2 | false |
| 42 | Sc | ScF₃(aq) + 3 H⁺ + 3 e⁻ ⇌ Sc(s) + 3 HF(aq) | ScF₃(aq) + 3 H⁺ + 3 e⁻ | Sc(s) + 3 HF(aq) | -2.37 | 3 | false |
| 43 | Zr | ZrO(OH)₂(s) + H₂O + 4 e⁻ ⇌ Zr(s) + 4 OH⁻ | ZrO(OH)₂(s) + H₂O + 4 e⁻ | Zr(s) + 4 OH⁻ | -2.36 | 4 | false |
| 44 | Pr | Pr³⁺ + 3 e⁻ ⇌ Pr(s) | Pr³⁺ + 3 e⁻ | Pr(s) | -2.353 | 3 | false |
| 45 | Ce | Ce³⁺ + 3 e⁻ ⇌ Ce(s) | Ce³⁺ + 3 e⁻ | Ce(s) | -2.336 | 3 | false |
| 46 | Er | Er³⁺ + 3 e⁻ ⇌ Er(s) | Er³⁺ + 3 e⁻ | Er(s) | -2.331 | 3 | false |
| 47 | Ho | Ho³⁺ + 3 e⁻ ⇌ Ho(s) | Ho³⁺ + 3 e⁻ | Ho(s) | -2.33 | 3 | false |
| 48 | Al | H₂AlO₃⁻ + H₂O + 3 e⁻ ⇌ Al(s) + 4 OH⁻ | H₂AlO₃⁻ + H₂O + 3 e⁻ | Al(s) + 4 OH⁻ | -2.33 | 3 | false |
| 49 | Nd | Nd³⁺ + 3 e⁻ ⇌ Nd(s) | Nd³⁺ + 3 e⁻ | Nd(s) | -2.323 | 3 | false |
| 50 | Tm | Tm³⁺ + 3 e⁻ ⇌ Tm(s) | Tm³⁺ + 3 e⁻ | Tm(s) | -2.319 | 3 | false |
| 51 | Al | Al(OH)₃(s) + 3 e⁻ ⇌ Al(s) + 3 OH⁻ | Al(OH)₃(s) + 3 e⁻ | Al(s) + 3 OH⁻ | -2.31 | 3 | false |
| 52 | Sm | Sm³⁺ + 3 e⁻ ⇌ Sm(s) | Sm³⁺ + 3 e⁻ | Sm(s) | -2.304 | 3 | false |
| 53 | Fm | Fm²⁺ + 2 e⁻ ⇌ Fm(s) | Fm²⁺ + 2 e⁻ | Fm(s) | -2.3 | 2 | false |
| 54 | Am | Am³⁺ + e⁻ ⇌ Am²⁺ | Am³⁺ + e⁻ | Am²⁺ | -2.3 | 1 | false |
| 55 | Dy | Dy³⁺ + 3 e⁻ ⇌ Dy(s) | Dy³⁺ + 3 e⁻ | Dy(s) | -2.295 | 3 | false |
| 56 | Lu | Lu³⁺ + 3 e⁻ ⇌ Lu(s) | Lu³⁺ + 3 e⁻ | Lu(s) | -2.28 | 3 | false |
| 57 | Sc | ScF₂⁺ + 2 H⁺ + 3 e⁻ ⇌ Sc(s) + 2 HF(l) | ScF₂⁺ + 2 H⁺ + 3 e⁻ | Sc(s) + 2 HF(l) | -2.28 | 3 | false |
| 58 | Tb | Tb³⁺ + 3 e⁻ ⇌ Tb(s) | Tb³⁺ + 3 e⁻ | Tb(s) | -2.28 | 3 | false |
| 59 | Gd | Gd³⁺ + 3 e⁻ ⇌ Gd(s) | Gd³⁺ + 3 e⁻ | Gd(s) | -2.279 | 3 | false |
| 60 | H | H₂(g) + 2 e⁻ ⇌ 2 H⁻ | H₂(g) + 2 e⁻ | 2 H⁻ | -2.23 | 2 | false |
| 61 | Es | Es²⁺ + 2 e⁻ ⇌ Es(s) | Es²⁺ + 2 e⁻ | Es(s) | -2.23 | 2 | false |
| 62 | Pm | Pm²⁺ + 2 e⁻ ⇌ Pm(s) | Pm²⁺ + 2 e⁻ | Pm(s) | -2.2 | 2 | false |
| 63 | Tm | Tm³⁺ + e⁻ ⇌ Tm²⁺ | Tm³⁺ + e⁻ | Tm²⁺ | -2.2 | 1 | false |
| 64 | Dy | Dy²⁺ + 2 e⁻ ⇌ Dy(s) | Dy²⁺ + 2 e⁻ | Dy(s) | -2.2 | 2 | false |
| 65 | Ac | Ac³⁺ + 3 e⁻ ⇌ Ac(s) | Ac³⁺ + 3 e⁻ | Ac(s) | -2.2 | 3 | false |
| 66 | Yb | Yb³⁺ + 3 e⁻ ⇌ Yb(s) | Yb³⁺ + 3 e⁻ | Yb(s) | -2.19 | 3 | false |
| 67 | Cf | Cf²⁺ + 2 e⁻ ⇌ Cf(s) | Cf²⁺ + 2 e⁻ | Cf(s) | -2.12 | 2 | false |
| 68 | Nd | Nd²⁺ + 2 e⁻ ⇌ Nd(s) | Nd²⁺ + 2 e⁻ | Nd(s) | -2.1 | 2 | false |
| 69 | Ho | Ho²⁺ + 2 e⁻ ⇌ Ho(s) | Ho²⁺ + 2 e⁻ | Ho(s) | -2.1 | 2 | false |
| 70 | Sc | Sc³⁺ + 3 e⁻ ⇌ Sc(s) | Sc³⁺ + 3 e⁻ | Sc(s) | -2.077 | 3 | false |
| 71 | Al | AlF₆³⁻ + 3 e⁻ ⇌ Al(s) + 6 F⁻ | AlF₆³⁻ + 3 e⁻ | Al(s) + 6 F⁻ | -2.069 | 3 | false |
| 72 | Cm | Cm³⁺ + 3 e⁻ ⇌ Cm(s) | Cm³⁺ + 3 e⁻ | Cm(s) | -2.04 | 3 | false |
| 73 | Pu | Pu³⁺ + 3 e⁻ ⇌ Pu(s) | Pu³⁺ + 3 e⁻ | Pu(s) | -2.031 | 3 | false |
| 74 | Pr | Pr²⁺ + 2 e⁻ ⇌ Pr(s) | Pr²⁺ + 2 e⁻ | Pr(s) | -2 | 2 | false |
| 75 | Er | Er²⁺ + 2 e⁻ ⇌ Er(s) | Er²⁺ + 2 e⁻ | Er(s) | -2 | 2 | false |
| 76 | Eu | Eu³⁺ + 3 e⁻ ⇌ Eu(s) | Eu³⁺ + 3 e⁻ | Eu(s) | -1.991 | 3 | false |
| 77 | Lr | Lr³⁺ + 3 e⁻ ⇌ Lr(s) | Lr³⁺ + 3 e⁻ | Lr(s) | -1.96 | 3 | false |
| 78 | Cf | Cf³⁺ + 3 e⁻ ⇌ Cf(s) | Cf³⁺ + 3 e⁻ | Cf(s) | -1.94 | 3 | false |
| 79 | Es | Es³⁺ + 3 e⁻ ⇌ Es(s) | Es³⁺ + 3 e⁻ | Es(s) | -1.91 | 3 | false |
| 80 | Pa | Pa⁴⁺ + e⁻ ⇌ Pa³⁺ | Pa⁴⁺ + e⁻ | Pa³⁺ | -1.9 | 1 | false |
| 81 | Am | Am²⁺ + 2 e⁻ ⇌ Am(s) | Am²⁺ + 2 e⁻ | Am(s) | -1.9 | 2 | false |
| 82 | Th | Th⁴⁺ + 4 e⁻ ⇌ Th(s) | Th⁴⁺ + 4 e⁻ | Th(s) | -1.899 | 4 | false |
| 83 | Fm | Fm³⁺ + 3 e⁻ ⇌ Fm(s) | Fm³⁺ + 3 e⁻ | Fm(s) | -1.89 | 3 | false |
| 84 | N | N₂(g) + 2 H₂O + 4 H⁺ + 2 e⁻ ⇌ 2 NH₃OH⁺ | N₂(g) + 2 H₂O + 4 H⁺ + 2 e⁻ | 2 NH₃OH⁺ | -1.87 | 2 | false |
| 85 | Np | Np³⁺ + 3 e⁻ ⇌ Np(s) | Np³⁺ + 3 e⁻ | Np(s) | -1.856 | 3 | false |
| 86 | Be | Be²⁺ + 2 e⁻ ⇌ Be(s) | Be²⁺ + 2 e⁻ | Be(s) | -1.847 | 2 | false |
| 87 | P | H₂PO₂⁻ + e⁻ ⇌ P(s) + 2 OH⁻ | H₂PO₂⁻ + e⁻ | P(s) + 2 OH⁻ | -1.82 | 1 | false |
| 88 | U | U³⁺ + 3 e⁻ ⇌ U(s) | U³⁺ + 3 e⁻ | U(s) | -1.798 | 3 | false |
| 89 | Sr | Sr²⁺ + 2 e⁻ ⇌ Sr(Hg) | Sr²⁺ + 2 e⁻ | Sr(Hg) | -1.793 | 2 | false |
| 90 | B | H₂BO₃⁻ + H₂O + 3 e⁻ ⇌ B(s) + 4 OH⁻ | H₂BO₃⁻ + H₂O + 3 e⁻ | B(s) + 4 OH⁻ | -1.79 | 3 | false |
| 91 | Th | ThO₂ + 4 H⁺ + 4 e⁻ ⇌ Th(s) + 2 H₂O | ThO₂ + 4 H⁺ + 4 e⁻ | Th(s) + 2 H₂O | -1.789 | 4 | false |
| 92 | Hf | HfO²⁺ + 2 H⁺ + 4 e⁻ ⇌ Hf(s) + H₂O | HfO²⁺ + 2 H⁺ + 4 e⁻ | Hf(s) + H₂O | -1.724 | 4 | false |
| 93 | P | HPO₃²⁻ + 2 H₂O + 3 e⁻ ⇌ P(s) + 5 OH⁻ | HPO₃²⁻ + 2 H₂O + 3 e⁻ | P(s) + 5 OH⁻ | -1.71 | 3 | false |
| 94 | Si | SiO₃²⁻ + 3 H₂O + 4 e⁻ ⇌ Si(s) + 6 OH⁻ | SiO₃²⁻ + 3 H₂O + 4 e⁻ | Si(s) + 6 OH⁻ | -1.697 | 4 | false |
| 95 | Al | Al³⁺ + 3 e⁻ ⇌ Al(s) | Al³⁺ + 3 e⁻ | Al(s) | -1.662 | 3 | false |
| 96 | Ti | Ti²⁺ + 2 e⁻ ⇌ Ti(s) | Ti²⁺ + 2 e⁻ | Ti(s) | -1.63 | 2 | false |
| 97 | Zr | ZrO₂(s) + 4 H⁺ + 4 e⁻ ⇌ Zr(s) + 2 H₂O | ZrO₂(s) + 4 H⁺ + 4 e⁻ | Zr(s) + 2 H₂O | -1.553 | 4 | false |
| 98 | Zr | Zr⁴⁺ + 4 e⁻ ⇌ Zr(s) | Zr⁴⁺ + 4 e⁻ | Zr(s) | -1.45 | 4 | false |
| 99 | Ti | Ti³⁺ + 3 e⁻ ⇌ Ti(s) | Ti³⁺ + 3 e⁻ | Ti(s) | -1.37 | 3 | false |
| 100 | Ti | TiO(s) + 2 H⁺ + 2 e⁻ ⇌ Ti(s) + H₂O | TiO(s) + 2 H⁺ + 2 e⁻ | Ti(s) + H₂O | -1.31 | 2 | false |
| 101 | B | [B(OH)₄]⁻ + 4 H₂O + 8 e⁻ ⇌ BH₄⁻ + 8 OH⁻ | [B(OH)₄]⁻ + 4 H₂O + 8 e⁻ | BH₄⁻ + 8 OH⁻ | -1.24 | 8 | false |
| 102 | Ti | Ti₂O₃(s) + 2 H⁺ + 2 e⁻ ⇌ 2 TiO(s) + H₂O | Ti₂O₃(s) + 2 H⁺ + 2 e⁻ | 2 TiO(s) + H₂O | -1.23 | 2 | false |
| 103 | Ga | [Ga(OH)₄]⁻ + 3 e⁻ ⇌ Ga(s) + 3 OH⁻ | [Ga(OH)₄]⁻ + 3 e⁻ | Ga(s) + 3 OH⁻ | -1.22 | 3 | false |
| 104 | Zn | [Zn(OH)₄]²⁻ + 2 e⁻ ⇌ Zn(s) + 4 OH⁻ | [Zn(OH)₄]²⁻ + 2 e⁻ | Zn(s) + 4 OH⁻ | -1.199 | 2 | false |
| 105 | Mn | Mn²⁺ + 2 e⁻ ⇌ Mn(s) | Mn²⁺ + 2 e⁻ | Mn(s) | -1.185 | 2 | false |
| 106 | Fe | [Fe(CN)₆]⁴⁻ + 6 H⁺ + 2 e⁻ ⇌ Fe(s) + 6 HCN(aq) | [Fe(CN)₆]⁴⁻ + 6 H⁺ + 2 e⁻ | Fe(s) + 6 HCN(aq) | -1.16 | 2 | false |
| 107 | C | C(s) + 3 H₂O + 2 e⁻ ⇌ CH₃OH(l) + 2 OH⁻ | C(s) + 3 H₂O + 2 e⁻ | CH₃OH(l) + 2 OH⁻ | -1.148 | 2 | false |
| 108 | Cr | [Cr(CN)₆]³⁻ + e⁻ ⇌ [Cr(CN)₆]⁴⁻ | [Cr(CN)₆]³⁻ + e⁻ | [Cr(CN)₆]⁴⁻ | -1.143 | 1 | false |
| 109 | Te | Te(s) + 2 e⁻ ⇌ Te²⁻ | Te(s) + 2 e⁻ | Te²⁻ | -1.143 | 2 | false |
| 110 | V | V²⁺ + 2 e⁻ ⇌ V(s) | V²⁺ + 2 e⁻ | V(s) | -1.13 | 2 | false |
| 111 | Nb | Nb³⁺ + 3 e⁻ ⇌ Nb(s) | Nb³⁺ + 3 e⁻ | Nb(s) | -1.099 | 3 | false |
| 112 | Sn | Sn(s) + 4 H⁺ + 4 e⁻ ⇌ SnH₄(g) | Sn(s) + 4 H⁺ + 4 e⁻ | SnH₄(g) | -1.07 | 4 | false |
| 113 | Po | Po(s) + 2 e⁻ ⇌ Po²⁻ | Po(s) + 2 e⁻ | Po²⁻ | -1.021 | 2 | false |
| 114 | Cr | [Cr(edta)(H₂O)]⁻ + e⁻ ⇌ [Cr(edta)(H₂O)]²⁻ | [Cr(edta)(H₂O)]⁻ + e⁻ | [Cr(edta)(H₂O)]²⁻ | -0.99 | 1 | false |
| 115 | P | 2 H₃PO₄(aq) + 2 H⁺ + 2 e⁻ ⇌ (H₂PO₃)₂(aq) + H₂O | 2 H₃PO₄(aq) + 2 H⁺ + 2 e⁻ | (H₂PO₃)₂(aq) + H₂O | -0.933 | 2 | false |
| 116 | C | CO₃²⁻ + 3 H⁺ + 2 e⁻ ⇌ HCO₂⁻ + H₂O | CO₃²⁻ + 3 H⁺ + 2 e⁻ | HCO₂⁻ + H₂O | -0.93 | 2 | false |
| 117 | Ti | TiO²⁺ + 2 H⁺ + 4 e⁻ ⇌ Ti(s) + H₂O | TiO²⁺ + 2 H⁺ + 4 e⁻ | Ti(s) + H₂O | -0.93 | 4 | false |
| 118 | Si | SiO₂(quartz) + 4 H⁺ + 4 e⁻ ⇌ Si(s) + 2 H₂O | SiO₂(quartz) + 4 H⁺ + 4 e⁻ | Si(s) + 2 H₂O | -0.909 | 4 | false |
| 119 | Cr | Cr²⁺ + 2 e⁻ ⇌ Cr(s) | Cr²⁺ + 2 e⁻ | Cr(s) | -0.9 | 2 | false |
| 120 | B | B(OH)₃(aq) + 3 H⁺ + 3 e⁻ ⇌ B(s) + 3 H₂O | B(OH)₃(aq) + 3 H⁺ + 3 e⁻ | B(s) + 3 H₂O | -0.89 | 3 | false |
| 121 | Fe | Fe(OH)₂(s) + 2 e⁻ ⇌ Fe(s) + 2 OH⁻ | Fe(OH)₂(s) + 2 e⁻ | Fe(s) + 2 OH⁻ | -0.89 | 2 | false |
| 122 | Fe | Fe₂O₃(s) + 3 H₂O + 2 e⁻ ⇌ 2 Fe(OH)₂(s) + 2 OH⁻ | Fe₂O₃(s) + 3 H₂O + 2 e⁻ | 2 Fe(OH)₂(s) + 2 OH⁻ | -0.86 | 2 | false |
| 123 | H | 2 H₂O + 2 e⁻ ⇌ H₂(g) + 2 OH⁻ | 2 H₂O + 2 e⁻ | H₂(g) + 2 OH⁻ | -0.8277 | 2 | false |
| 124 | Bi | Bi(s) + 3 H⁺ + 3 e⁻ ⇌ BiH₃ | Bi(s) + 3 H⁺ + 3 e⁻ | BiH₃ | -0.8 | 3 | false |
| 125 | Zn | Zn²⁺ + 2 e⁻ ⇌ Zn(Hg) | Zn²⁺ + 2 e⁻ | Zn(Hg) | -0.7628 | 2 | false |
| 126 | Zn | Zn²⁺ + 2 e⁻ ⇌ Zn(s) | Zn²⁺ + 2 e⁻ | Zn(s) | -0.7618 | 2 | false |
| 127 | Ta | Ta₂O₅(s) + 10 H⁺ + 10 e⁻ ⇌ 2 Ta(s) + 5 H₂O | Ta₂O₅(s) + 10 H⁺ + 10 e⁻ | 2 Ta(s) + 5 H₂O | -0.75 | 10 | false |
| 128 | Cr | Cr³⁺ + 3 e⁻ ⇌ Cr(s) | Cr³⁺ + 3 e⁻ | Cr(s) | -0.74 | 3 | false |
| 129 | Te | 2 Te(s) + 2 e⁻ ⇌ Te₂²⁻ | 2 Te(s) + 2 e⁻ | Te₂²⁻ | -0.74 | 2 | false |
| 130 | Ni | Ni(OH)₂(s) + 2 e⁻ ⇌ Ni(s) + 2 OH⁻ | Ni(OH)₂(s) + 2 e⁻ | Ni(s) + 2 OH⁻ | -0.72 | 2 | false |
| 131 | Nb | Nb₂O₅(s) + 10 H⁺ + 10 e⁻ ⇌ 2 Nb(s) + 5 H₂O | Nb₂O₅(s) + 10 H⁺ + 10 e⁻ | 2 Nb(s) + 5 H₂O | -0.7 | 10 | false |
| 132 | Ag | Ag₂S(s) + 2 e⁻ ⇌ 2 Ag(s) + S²⁻ | Ag₂S(s) + 2 e⁻ | 2 Ag(s) + S²⁻ | -0.69 | 2 | false |
| 133 | Te | Te₂²⁻ + 4 H⁺ + 2 e⁻ ⇌ 2 H₂Te(g) | Te₂²⁻ + 4 H⁺ + 2 e⁻ | 2 H₂Te(g) | -0.64 | 2 | false |
| 134 | Sb | [Sb(OH)₄]⁻ + 3 e⁻ ⇌ Sb(s) + 4 OH⁻ | [Sb(OH)₄]⁻ + 3 e⁻ | Sb(s) + 4 OH⁻ | -0.639 | 3 | false |
| 135 | Au | [Au(CN)₂]⁻ + e⁻ ⇌ Au(s) + 2 CN⁻ | [Au(CN)₂]⁻ + e⁻ | Au(s) + 2 CN⁻ | -0.6 | 1 | false |
| 136 | Ta | Ta³⁺ + 3 e⁻ ⇌ Ta(s) | Ta³⁺ + 3 e⁻ | Ta(s) | -0.6 | 3 | false |
| 137 | Pb | PbO(s) + H₂O + 2 e⁻ ⇌ Pb(s) + 2 OH⁻ | PbO(s) + H₂O + 2 e⁻ | Pb(s) + 2 OH⁻ | -0.58 | 2 | false |
| 138 | Ti | 2 TiO₂(s) + 2 H⁺ + 2 e⁻ ⇌ Ti₂O₃(s) + H₂O | 2 TiO₂(s) + 2 H⁺ + 2 e⁻ | Ti₂O₃(s) + H₂O | -0.56 | 2 | false |
| 139 | Ga | Ga³⁺ + 3 e⁻ ⇌ Ga(s) | Ga³⁺ + 3 e⁻ | Ga(s) | -0.549 | 3 | false |
| 140 | U | U⁴⁺ + e⁻ ⇌ U³⁺ | U⁴⁺ + e⁻ | U³⁺ | -0.52 | 1 | false |
| 141 | P | H₃PO₂(aq) + H⁺ + e⁻ ⇌ P(white) + 2 H₂O | H₃PO₂(aq) + H⁺ + e⁻ | P(white) + 2 H₂O | -0.508 | 1 | false |
| 142 | P | H₃PO₃(aq) + 2 H⁺ + 2 e⁻ ⇌ H₃PO₂(aq) + H₂O | H₃PO₃(aq) + 2 H⁺ + 2 e⁻ | H₃PO₂(aq) + H₂O | -0.499 | 2 | false |
| 143 | Ni | NiO₂(s) + 2 H₂O + 2 e⁻ ⇌ Ni(OH)₂(s) + 2 OH⁻ | NiO₂(s) + 2 H₂O + 2 e⁻ | Ni(OH)₂(s) + 2 OH⁻ | -0.49 | 2 | false |
| 144 | Sb | [Sb(OH)₆]⁻ + 2 e⁻ ⇌ [Sb(OH)₄]⁻ + 2 OH⁻ | [Sb(OH)₆]⁻ + 2 e⁻ | [Sb(OH)₄]⁻ + 2 OH⁻ | -0.465 | 2 | false |
| 145 | P | H₃PO₃(aq) + 3 H⁺ + 3 e⁻ ⇌ P(red) + 3 H₂O | H₃PO₃(aq) + 3 H⁺ + 3 e⁻ | P(red) + 3 H₂O | -0.454 | 3 | false |
| 146 | Bi | Bi₂O₃(s) + 3 H₂O + 6 e⁻ ⇌ Bi(s) + 6 OH⁻ | Bi₂O₃(s) + 3 H₂O + 6 e⁻ | Bi(s) + 6 OH⁻ | -0.452 | 6 | false |
| 147 | Ta | TaF₇²⁻ + 7 H⁺ + 5 e⁻ ⇌ Ta(s) + 7 HF(l) | TaF₇²⁻ + 7 H⁺ + 5 e⁻ | Ta(s) + 7 HF(l) | -0.45 | 5 | false |
| 148 | In | In³⁺ + 2 e⁻ ⇌ In⁺ | In³⁺ + 2 e⁻ | In⁺ | -0.444 | 2 | false |
| 149 | Cu | [Cu(CN)₂]⁻ + e⁻ ⇌ Cu(s) + 2 CN⁻ | [Cu(CN)₂]⁻ + e⁻ | Cu(s) + 2 CN⁻ | -0.44 | 1 | false |
| 150 | Fe | Fe²⁺ + 2 e⁻ ⇌ Fe(s) | Fe²⁺ + 2 e⁻ | Fe(s) | -0.44 | 2 | false |
| 151 | C | 2 CO₂(g) + 2 H⁺ + 2 e⁻ ⇌ HOOCCOOH(aq) | 2 CO₂(g) + 2 H⁺ + 2 e⁻ | HOOCCOOH(aq) | -0.43 | 2 | false |
| 152 | Cr | Cr³⁺ + e⁻ ⇌ Cr²⁺ | Cr³⁺ + e⁻ | Cr²⁺ | -0.407 | 1 | false |
| 153 | Cd | Cd²⁺ + 2 e⁻ ⇌ Cd(s) | Cd²⁺ + 2 e⁻ | Cd(s) | -0.4 | 2 | false |
| 154 | Ti | Ti³⁺ + e⁻ ⇌ Ti²⁺ | Ti³⁺ + e⁻ | Ti²⁺ | -0.37 | 1 | false |
| 155 | Cu | Cu₂O(s) + H₂O + 2 e⁻ ⇌ 2 Cu(s) + 2 OH⁻ | Cu₂O(s) + H₂O + 2 e⁻ | 2 Cu(s) + 2 OH⁻ | -0.36 | 2 | false |
| 156 | Pb | PbSO₄(s) + 2 e⁻ ⇌ Pb(s) + SO₄²⁻ | PbSO₄(s) + 2 e⁻ | Pb(s) + SO₄²⁻ | -0.3588 | 2 | false |
| 157 | Pb | PbSO₄(s) + 2 e⁻ ⇌ Pb(Hg) + SO₄²⁻ | PbSO₄(s) + 2 e⁻ | Pb(Hg) + SO₄²⁻ | -0.3505 | 2 | false |
| 158 | Eu | Eu³⁺ + e⁻ ⇌ Eu²⁺ | Eu³⁺ + e⁻ | Eu²⁺ | -0.35 | 1 | false |
| 159 | In | In³⁺ + 3 e⁻ ⇌ In(s) | In³⁺ + 3 e⁻ | In(s) | -0.34 | 3 | false |
| 160 | Tl | Tl⁺ + e⁻ ⇌ Tl(s) | Tl⁺ + e⁻ | Tl(s) | -0.34 | 1 | false |
| 161 | Ge | Ge(s) + 4 H⁺ + 4 e⁻ ⇌ GeH₄(g) | Ge(s) + 4 H⁺ + 4 e⁻ | GeH₄(g) | -0.29 | 4 | false |
| 162 | Co | Co²⁺ + 2 e⁻ ⇌ Co(s) | Co²⁺ + 2 e⁻ | Co(s) | -0.28 | 2 | false |
| 163 | P | H₃PO₄(aq) + 2 H⁺ + 2 e⁻ ⇌ H₃PO₃(aq) + H₂O | H₃PO₄(aq) + 2 H⁺ + 2 e⁻ | H₃PO₃(aq) + H₂O | -0.276 | 2 | false |
| 165 | V | V³⁺ + e⁻ ⇌ V²⁺ | V³⁺ + e⁻ | V²⁺ | -0.26 | 1 | false |
| 166 | Ni | Ni²⁺ + 2 e⁻ ⇌ Ni(s) | Ni²⁺ + 2 e⁻ | Ni(s) | -0.257 | 2 | false |
| 167 | S | 2 HSO₄⁻ + 2 H⁺ + 2 e⁻ ⇌ S₂O₆²⁻ + 2 H₂O | 2 HSO₄⁻ + 2 H⁺ + 2 e⁻ | S₂O₆²⁻ + 2 H₂O | -0.253 | 2 | false |
| 168 | As | As(s) + 3 H⁺ + 3 e⁻ ⇌ AsH₃(g) | As(s) + 3 H⁺ + 3 e⁻ | AsH₃(g) | -0.23 | 3 | false |
| 169 | N | N₂(g) + 5 H⁺ + 4 e⁻ ⇌ N₂H₅⁺ | N₂(g) + 5 H⁺ + 4 e⁻ | N₂H₅⁺ | -0.23 | 4 | false |
| 170 | Ga | Ga⁺ + e⁻ ⇌ Ga(s) | Ga⁺ + e⁻ | Ga(s) | -0.2 | 1 | false |
| 171 | Ag | AgI(s) + e⁻ ⇌ Ag(s) + I⁻ | AgI(s) + e⁻ | Ag(s) + I⁻ | -0.15224 | 1 | false |
| 172 | Ge | GeO₂(s) + 4 H⁺ + 4 e⁻ ⇌ Ge(s) + 2 H₂O | GeO₂(s) + 4 H⁺ + 4 e⁻ | Ge(s) + 2 H₂O | -0.15 | 4 | false |
| 173 | Mo | MoO₂(s) + 4 H⁺ + 4 e⁻ ⇌ Mo(s) + 2 H₂O | MoO₂(s) + 4 H⁺ + 4 e⁻ | Mo(s) + 2 H₂O | -0.15 | 4 | false |
| 174 | Si | Si(s) + 4 H⁺ + 4 e⁻ ⇌ SiH₄(g) | Si(s) + 4 H⁺ + 4 e⁻ | SiH₄(g) | -0.14 | 4 | false |
| 175 | Sn | Sn²⁺ + 2 e⁻ ⇌ Sn(s) | Sn²⁺ + 2 e⁻ | Sn(s) | -0.13 | 2 | false |
| 176 | O | O₂(g) + H⁺ + e⁻ ⇌ HO• ₂(aq) | O₂(g) + H⁺ + e⁻ | HO• ₂(aq) | -0.13 | 1 | false |
| 177 | In | In⁺ + e⁻ ⇌ In(s) | In⁺ + e⁻ | In(s) | -0.126 | 1 | false |
| 178 | Pb | Pb²⁺ + 2 e⁻ ⇌ Pb(s) | Pb²⁺ + 2 e⁻ | Pb(s) | -0.126 | 2 | false |
| 179 | W | WO₂(s) + 4 H⁺ + 4 e⁻ ⇌ W(s) + 2 H₂O | WO₂(s) + 4 H⁺ + 4 e⁻ | W(s) + 2 H₂O | -0.12 | 4 | false |
| 180 | Ge | GeO₂(s) + 2 H⁺ + 2 e⁻ ⇌ GeO(s) + H₂O | GeO₂(s) + 2 H⁺ + 2 e⁻ | GeO(s) + H₂O | -0.118 | 2 | false |
| 181 | P | P(red) + 3 H⁺ + 3 e⁻ ⇌ PH₃(g) | P(red) + 3 H⁺ + 3 e⁻ | PH₃(g) | -0.111 | 3 | false |
| 182 | C | CO₂(g) + 2 H⁺ + 2 e⁻ ⇌ HCOOH(aq) | CO₂(g) + 2 H⁺ + 2 e⁻ | HCOOH(aq) | -0.11 | 2 | false |
| 183 | Se | Se(s) + 2 H⁺ + 2 e⁻ ⇌ H₂Se(g) | Se(s) + 2 H⁺ + 2 e⁻ | H₂Se(g) | -0.11 | 2 | false |
| 184 | C | CO₂(g) + 2 H⁺ + 2 e⁻ ⇌ CO(g) + H₂O | CO₂(g) + 2 H⁺ + 2 e⁻ | CO(g) + H₂O | -0.11 | 2 | false |
| 185 | Sn | α-SnO(s) + 2 H⁺ + 2 e⁻ ⇌ Sn(s) + H₂O | α-SnO(s) + 2 H⁺ + 2 e⁻ | Sn(s) + H₂O | -0.104 | 2 | false |
| 186 | Cu | [Cu(NH₃)₂]⁺ + e⁻ ⇌ Cu(s) + 2 NH₃(aq) | [Cu(NH₃)₂]⁺ + e⁻ | Cu(s) + 2 NH₃(aq) | -0.1 | 1 | false |
| 187 | Nb | Nb₂O₅(s) + 10 H⁺ + 4 e⁻ ⇌ 2 Nb³⁺ + 5 H₂O | Nb₂O₅(s) + 10 H⁺ + 4 e⁻ | 2 Nb³⁺ + 5 H₂O | -0.1 | 4 | false |
| 188 | W | WO₃(aq) + 6 H⁺ + 6 e⁻ ⇌ W(s) + 3 H₂O | WO₃(aq) + 6 H⁺ + 6 e⁻ | W(s) + 3 H₂O | -0.09 | 6 | false |
| 189 | Sn | SnO₂(s) + 2 H⁺ + 2 e⁻ ⇌ α-SnO(s) + H₂O | SnO₂(s) + 2 H⁺ + 2 e⁻ | α-SnO(s) + H₂O | -0.088 | 2 | false |
| 190 | Fe | Fe₃O₄(s) + 8 H⁺ + 8 e⁻ ⇌ 3 Fe(s) + 4 H₂O | Fe₃O₄(s) + 8 H⁺ + 8 e⁻ | 3 Fe(s) + 4 H₂O | -0.085 | 8 | false |
| 191 | V | VOH²⁺ + H⁺ + e⁻ ⇌ V²⁺ + H₂O | VOH²⁺ + H⁺ + e⁻ | V²⁺ + H₂O | -0.082 | 1 | false |
| 192 | P | P(white) + 3 H⁺ + 3 e⁻ ⇌ PH₃(g) | P(white) + 3 H⁺ + 3 e⁻ | PH₃(g) | -0.063 | 3 | false |
| 193 | N | N₂O(g) + H₂O + 6 H⁺ + 4 e⁻ ⇌ 2 NH₃OH⁺ | N₂O(g) + H₂O + 6 H⁺ + 4 e⁻ | 2 NH₃OH⁺ | -0.05 | 4 | false |
| 194 | Fe | Fe³⁺ + 3 e⁻ ⇌ Fe(s) | Fe³⁺ + 3 e⁻ | Fe(s) | -0.04 | 3 | false |
| 195 | C | HCOOH(aq) + 2 H⁺ + 2 e⁻ ⇌ HCHO(aq) + H₂O | HCOOH(aq) + 2 H⁺ + 2 e⁻ | HCHO(aq) + H₂O | -0.034 | 2 | false |
| 196 | H | 2 H⁺ + 2 e⁻ ⇌ H₂(g) | 2 H⁺ + 2 e⁻ | H₂(g) | 0 | 2 | false |
| 197 | Ag | AgBr(s) + e⁻ ⇌ Ag(s) + Br⁻ | AgBr(s) + e⁻ | Ag(s) + Br⁻ | 0.07133 | 1 | false |
| 198 | S | S₄O₆²⁻ + 2 e⁻ ⇌ 2 S₂O₃²⁻ | S₄O₆²⁻ + 2 e⁻ | 2 S₂O₃²⁻ | 0.08 | 2 | false |
| 199 | N | N₂(g) + 2 H₂O + 6 H⁺ + 6 e⁻ ⇌ 2 NH₄OH(aq) | N₂(g) + 2 H₂O + 6 H⁺ + 6 e⁻ | 2 NH₄OH(aq) | 0.092 | 6 | false |
| 200 | Hg | HgO(s) + H₂O + 2 e⁻ ⇌ Hg(l) + 2 OH⁻ | HgO(s) + H₂O + 2 e⁻ | Hg(l) + 2 OH⁻ | 0.0977 | 2 | false |
| 201 | Cu | [Cu(NH₃)₄]²⁺ + e⁻ ⇌ [Cu(NH₃)₂]⁺ + 2 NH₃(aq) | [Cu(NH₃)₄]²⁺ + e⁻ | [Cu(NH₃)₂]⁺ + 2 NH₃(aq) | 0.1 | 1 | false |
| 202 | Ru | [Ru(NH₃)₆]³⁺ + e⁻ ⇌ [Ru(NH₃)₆]²⁺ | [Ru(NH₃)₆]³⁺ + e⁻ | [Ru(NH₃)₆]²⁺ | 0.1 | 1 | false |
| 203 | N | N₂H₄(aq) + 4 H₂O + 2 e⁻ ⇌ 2 NH₄⁺ + 4 OH⁻ | N₂H₄(aq) + 4 H₂O + 2 e⁻ | 2 NH₄⁺ + 4 OH⁻ | 0.11 | 2 | false |
| 204 | Mo | H₂MoO₄(aq) + 6 H⁺ + 6 e⁻ ⇌ Mo(s) + 4 H₂O | H₂MoO₄(aq) + 6 H⁺ + 6 e⁻ | Mo(s) + 4 H₂O | 0.11 | 6 | false |
| 205 | Ge | Ge⁴⁺ + 4 e⁻ ⇌ Ge(s) | Ge⁴⁺ + 4 e⁻ | Ge(s) | 0.12 | 4 | false |
| 206 | C | C(s) + 4 H⁺ + 4 e⁻ ⇌ CH₄(g) | C(s) + 4 H⁺ + 4 e⁻ | CH₄(g) | 0.13 | 4 | false |
| 207 | C | HCHO(aq) + 2 H⁺ + 2 e⁻ ⇌ CH₃OH(aq) | HCHO(aq) + 2 H⁺ + 2 e⁻ | CH₃OH(aq) | 0.13 | 2 | false |
| 208 | S | S(s) + 2 H⁺ + 2 e⁻ ⇌ H₂S(g) | S(s) + 2 H⁺ + 2 e⁻ | H₂S(g) | 0.144 | 2 | false |
| 209 | Sb | Sb₂O₃(s) + 6 H⁺ + 6 e⁻ ⇌ 2 Sb(s) + 3 H₂O | Sb₂O₃(s) + 6 H⁺ + 6 e⁻ | 2 Sb(s) + 3 H₂O | 0.15 | 6 | false |
| 210 | Sn | Sn⁴⁺ + 2 e⁻ ⇌ Sn²⁺ | Sn⁴⁺ + 2 e⁻ | Sn²⁺ | 0.151 | 2 | false |
| 211 | S | HSO₄⁻ + 3 H⁺ + 2 e⁻ ⇌ SO₂(aq) + 2 H₂O | HSO₄⁻ + 3 H⁺ + 2 e⁻ | SO₂(aq) + 2 H₂O | 0.158 | 2 | false |
| 212 | Cu | Cu²⁺ + e⁻ ⇌ Cu⁺ | Cu²⁺ + e⁻ | Cu⁺ | 0.159 | 1 | false |
| 213 | U | UO₂²⁺ + e⁻ ⇌ UO₂⁺ | UO₂²⁺ + e⁻ | UO₂⁺ | 0.163 | 1 | false |
| 214 | S | SO₄²⁻ + 4 H⁺ + 2 e⁻ ⇌ SO₂(aq) + 2 H₂O | SO₄²⁻ + 4 H⁺ + 2 e⁻ | SO₂(aq) + 2 H₂O | 0.17 | 2 | false |
| 215 | Ti | TiO²⁺ + 2 H⁺ + e⁻ ⇌ Ti³⁺ + H₂O | TiO²⁺ + 2 H⁺ + e⁻ | Ti³⁺ + H₂O | 0.19 | 1 | false |
| 216 | Sb | SbO⁺ + 2 H⁺ + 3 e⁻ ⇌ Sb(s) + H₂O | SbO⁺ + 2 H⁺ + 3 e⁻ | Sb(s) + H₂O | 0.2 | 3 | false |
| 217 | Fe | 3 Fe₂O₃(s) + 2 H⁺ + 2 e⁻ ⇌ 2 Fe₃O₄(s) + H₂O | 3 Fe₂O₃(s) + 2 H⁺ + 2 e⁻ | 2 Fe₃O₄(s) + H₂O | 0.22 | 2 | false |
| 218 | Ag | AgCl(s) + e⁻ ⇌ Ag(s) + Cl⁻ | AgCl(s) + e⁻ | Ag(s) + Cl⁻ | 0.22233 | 1 | false |
| 219 | As | H₃AsO₃(aq) + 3 H⁺ + 3 e⁻ ⇌ As(s) + 3 H₂O | H₃AsO₃(aq) + 3 H⁺ + 3 e⁻ | As(s) + 3 H₂O | 0.24 | 3 | false |
| 220 | Ru | Ru³⁺ + e⁻ ⇌ Ru²⁺ | Ru³⁺ + e⁻ | Ru²⁺ | 0.249 | 1 | false |
| 221 | Pb | PbO₂(s) + H₂O + 2 e⁻ ⇌ α-PbO(s) + 2 OH⁻ | PbO₂(s) + H₂O + 2 e⁻ | α-PbO(s) + 2 OH⁻ | 0.254 | 2 | false |
| 222 | Ge | GeO(s) + 2 H⁺ + 2 e⁻ ⇌ Ge(s) + H₂O | GeO(s) + 2 H⁺ + 2 e⁻ | Ge(s) + H₂O | 0.26 | 2 | false |
| 164 | N | N₂(g) + 8 H⁺ + 6 e⁻ ⇌ 2 NH₄⁺ | N₂(g) + 8 H⁺ + 6 e⁻ | 2 NH₄⁺ | 0.27 | 6 | false |
| 223 | Hg | Hg₂Cl₂(s) + 2 e⁻ ⇌ 2 Hg(l) + 2 Cl⁻ | Hg₂Cl₂(s) + 2 e⁻ | 2 Hg(l) + 2 Cl⁻ | 0.27 | 2 | false |
| 224 | U | UO₂⁺ + 4 H⁺ + e⁻ ⇌ U⁴⁺ + 2 H₂O | UO₂⁺ + 4 H⁺ + e⁻ | U⁴⁺ + 2 H₂O | 0.273 | 1 | false |
| 225 | At | At + e⁻ ⇌ At⁻ | At + e⁻ | At⁻ | 0.3 | 1 | false |
| 226 | Bi | Bi³⁺ + 3 e⁻ ⇌ Bi(s) | Bi³⁺ + 3 e⁻ | Bi(s) | 0.308 | 3 | false |
| 227 | C | 2 HCNO + 2 H⁺ + 2 e⁻ ⇌ (CN)₂ + 2 H₂O | 2 HCNO + 2 H⁺ + 2 e⁻ | (CN)₂ + 2 H₂O | 0.33 | 2 | false |
| 228 | Cu | Cu²⁺ + 2 e⁻ ⇌ Cu(s) | Cu²⁺ + 2 e⁻ | Cu(s) | 0.337 | 2 | false |
| 229 | V | VO²⁺ + 2 H⁺ + e⁻ ⇌ V³⁺ + H₂O | VO²⁺ + 2 H⁺ + e⁻ | V³⁺ + H₂O | 0.337 | 1 | false |
| 230 | Sb | Sb₂O₄(s) + 2 H⁺ + 2 e⁻ ⇌ Sb₂O₃(s) + H₂O | Sb₂O₄(s) + 2 H⁺ + 2 e⁻ | Sb₂O₃(s) + H₂O | 0.342 | 2 | false |
| 231 | At | At⁺ + 2 e⁻ ⇌ At⁻ | At⁺ + 2 e⁻ | At⁻ | 0.36 | 2 | false |
| 232 | Fe | [Fe(CN)₆]³⁻ + e⁻ ⇌ [Fe(CN)₆]⁴⁻ | [Fe(CN)₆]³⁻ + e⁻ | [Fe(CN)₆]⁴⁻ | 0.3704 | 1 | false |
| 233 | C | (CN)₂ + 2 H⁺ + 2 e⁻ ⇌ 2 HCN | (CN)₂ + 2 H⁺ + 2 e⁻ | 2 HCN | 0.373 | 2 | false |
| 234 | P | (H₂PO₃)₂(aq) + 2 H⁺ + 2 e⁻ ⇌ 2 H₃PO₃ | (H₂PO₃)₂(aq) + 2 H⁺ + 2 e⁻ | 2 H₃PO₃ | 0.38 | 2 | false |
| 235 | S | 2 SO₂(aq) + 2 H⁺ + 2 e⁻ ⇌ S₂O₃²⁻ + H₂O | 2 SO₂(aq) + 2 H⁺ + 2 e⁻ | S₂O₃²⁻ + H₂O | 0.4 | 2 | false |
| 236 | O | O₂(g) + 2 H₂O + 4 e⁻ ⇌ 4 OH⁻ | O₂(g) + 2 H₂O + 4 e⁻ | 4 OH⁻ | 0.401 | 4 | false |
| 237 | Mo | H₂MoO₄ + 6 H⁺ + 3 e⁻ ⇌ Mo³⁺ + 4 H₂O | H₂MoO₄ + 6 H⁺ + 3 e⁻ | Mo³⁺ + 4 H₂O | 0.43 | 3 | false |
| 238 | Ru | Ru²⁺ + 2 e⁻ ⇌ Ru(s) | Ru²⁺ + 2 e⁻ | Ru(s) | 0.455 | 2 | false |
| 239 | V | VO(OH)⁺ + 2 H⁺ + e⁻ ⇌ VOH²⁺ + H₂O | VO(OH)⁺ + 2 H⁺ + e⁻ | VOH²⁺ + H₂O | 0.481 | 1 | false |
| 240 | Re | Re³⁺ + 3 e⁻ ⇌ Re(s) | Re³⁺ + 3 e⁻ | Re(s) | 0.5 | 3 | false |
| 241 | C | CH₃OH(aq) + 2 H⁺ + 2 e⁻ ⇌ CH₄(g) + H₂O | CH₃OH(aq) + 2 H⁺ + 2 e⁻ | CH₄(g) + H₂O | 0.5 | 2 | false |
| 242 | S | SO₂(aq) + 4 H⁺ + 4 e⁻ ⇌ S(s) + 2 H₂O | SO₂(aq) + 4 H⁺ + 4 e⁻ | S(s) + 2 H₂O | 0.5 | 4 | false |
| 243 | S | 4 SO₂(aq) + 4 H⁺ + 6 e⁻ ⇌ S₄O₆²⁻ + 2 H₂O | 4 SO₂(aq) + 4 H⁺ + 6 e⁻ | S₄O₆²⁻ + 2 H₂O | 0.51 | 6 | false |
| 244 | Cu | Cu⁺ + e⁻ ⇌ Cu(s) | Cu⁺ + e⁻ | Cu(s) | 0.52 | 1 | false |
| 245 | C | CO(g) + 2 H⁺ + 2 e⁻ ⇌ C(s) + H₂O | CO(g) + 2 H⁺ + 2 e⁻ | C(s) + H₂O | 0.52 | 2 | false |
| 246 | I | I₃⁻ + 2 e⁻ ⇌ 3 I⁻ | I₃⁻ + 2 e⁻ | 3 I⁻ | 0.53 | 2 | false |
| 247 | Te | TeO₂(s) + 4 H⁺ + 4 e⁻ ⇌ Te(s) + 2 H₂O | TeO₂(s) + 4 H⁺ + 4 e⁻ | Te(s) + 2 H₂O | 0.53 | 4 | false |
| 248 | Cu | Cu²⁺ + Cl⁻ + e⁻ ⇌ CuCl(s) | Cu²⁺ + Cl⁻ + e⁻ | CuCl(s) | 0.54 | 1 | false |
| 249 | I | I₂(s) + 2 e⁻ ⇌ 2 I⁻ | I₂(s) + 2 e⁻ | 2 I⁻ | 0.54 | 2 | false |
| 250 | Au | AuI₄⁻ + 3 e⁻ ⇌ Au(s) + 4 I⁻ | AuI₄⁻ + 3 e⁻ | Au(s) + 4 I⁻ | 0.56 | 3 | false |
| 251 | As | H₃AsO₄(aq) + 2 H⁺ + 2 e⁻ ⇌ H₃AsO₃(aq) + H₂O | H₃AsO₄(aq) + 2 H⁺ + 2 e⁻ | H₃AsO₃(aq) + H₂O | 0.56 | 2 | false |
| 252 | S | S₂O₆²⁻ + 4 H⁺ + 2 e⁻ ⇌ 2 H₂SO₃ | S₂O₆²⁻ + 4 H⁺ + 2 e⁻ | 2 H₂SO₃ | 0.569 | 2 | false |
| 253 | Au | AuI₂⁻ + e⁻ ⇌ Au(s) + 2 I⁻ | AuI₂⁻ + e⁻ | Au(s) + 2 I⁻ | 0.58 | 1 | false |
| 254 | Mn | MnO₄⁻ + 2 H₂O + 3 e⁻ ⇌ MnO₂(s) + 4 OH⁻ | MnO₄⁻ + 2 H₂O + 3 e⁻ | MnO₂(s) + 4 OH⁻ | 0.595 | 3 | false |
| 255 | S | S₂O₃²⁻ + 6 H⁺ + 4 e⁻ ⇌ 2 S(s) + 3 H₂O | S₂O₃²⁻ + 6 H⁺ + 4 e⁻ | 2 S(s) + 3 H₂O | 0.6 | 4 | false |
| 256 | Fe | Fc⁺ + e⁻ ⇌ Fc(s) | Fc⁺ + e⁻ | Fc(s) | 0.63 | 1 | false |
| 257 | Mo | H₂MoO₄(aq) + 2 H⁺ + 2 e⁻ ⇌ MoO₂(s) + 2 H₂O | H₂MoO₄(aq) + 2 H⁺ + 2 e⁻ | MoO₂(s) + 2 H₂O | 0.65 | 2 | false |
| 258 | N | HN₃(aq) + 11 H⁺ + 8 e⁻ ⇌ 3 NH₄⁺ | HN₃(aq) + 11 H⁺ + 8 e⁻ | 3 NH₄⁺ | 0.69 | 8 | false |
| 259 | O | O₂(g) + 2 H⁺ + 2 e⁻ ⇌ H₂O₂(aq) | O₂(g) + 2 H⁺ + 2 e⁻ | H₂O₂(aq) | 0.695 | 2 | false |
| 260 | Sb | Sb₂O₅(s) + 4 H⁺ + 4 e⁻ ⇌ Sb₂O₃(s) + 2 H₂O | Sb₂O₅(s) + 4 H⁺ + 4 e⁻ | Sb₂O₃(s) + 2 H₂O | 0.699 | 4 | false |
| 261 | V | H₂V₁₀O₂₈⁴⁻ + 24 H⁺ + 10 e⁻ ⇌ 10 VO(OH)⁺ + 8 H₂O | H₂V₁₀O₂₈⁴⁻ + 24 H⁺ + 10 e⁻ | 10 VO(OH)⁺ + 8 H₂O | 0.723 | 10 | false |
| 262 | Pt | PtCl₆²⁻ + 2 e⁻ ⇌ PtCl₄²⁻ + 2 Cl⁻ | PtCl₆²⁻ + 2 e⁻ | PtCl₄²⁻ + 2 Cl⁻ | 0.726 | 2 | false |
| 263 | Fe | Fe₂O₃(s) + 6 H⁺ + 2 e⁻ ⇌ 2 Fe²⁺ + 3 H₂O | Fe₂O₃(s) + 6 H⁺ + 2 e⁻ | 2 Fe²⁺ + 3 H₂O | 0.728 | 2 | false |
| 264 | Se | H₂SeO₃(aq) + 4 H⁺ + 4 e⁻ ⇌ Se(s) + 3 H₂O | H₂SeO₃(aq) + 4 H⁺ + 4 e⁻ | Se(s) + 3 H₂O | 0.74 | 4 | false |
| 265 | At | AtO⁺ + 2 H⁺ + 2 e⁻ ⇌ At⁺ + H₂O | AtO⁺ + 2 H⁺ + 2 e⁻ | At⁺ + H₂O | 0.74 | 2 | false |
| 266 | Tl | Tl³⁺ + 3 e⁻ ⇌ Tl(s) | Tl³⁺ + 3 e⁻ | Tl(s) | 0.741 | 3 | false |
| 267 | No | No³⁺ + e⁻ ⇌ No²⁺ | No³⁺ + e⁻ | No²⁺ | 0.75 | 1 | false |
| 268 | Pt | PtCl₄²⁻ + 2 e⁻ ⇌ Pt(s) + 4 Cl⁻ | PtCl₄²⁻ + 2 e⁻ | Pt(s) + 4 Cl⁻ | 0.758 | 2 | false |
| 269 | Br | BrO⁻ + H₂O + 2 e⁻ ⇌ Br⁻ + 2 OH⁻ | BrO⁻ + H₂O + 2 e⁻ | Br⁻ + 2 OH⁻ | 0.76 | 2 | false |
| 270 | Po | Po⁴⁺ + 4 e⁻ ⇌ Po(s) | Po⁴⁺ + 4 e⁻ | Po(s) | 0.76 | 4 | false |
| 271 | S | (SCN)₂ + 2 e⁻ ⇌ 2 SCN⁻ | (SCN)₂ + 2 e⁻ | 2 SCN⁻ | 0.769 | 2 | false |
| 272 | Fe | Fe³⁺ + e⁻ ⇌ Fe²⁺ | Fe³⁺ + e⁻ | Fe²⁺ | 0.771 | 1 | false |
| 273 | Hg | Hg₂²⁺ + 2 e⁻ ⇌ 2 Hg(l) | Hg₂²⁺ + 2 e⁻ | 2 Hg(l) | 0.7973 | 2 | false |
| 274 | Ag | Ag⁺ + e⁻ ⇌ Ag(s) | Ag⁺ + e⁻ | Ag(s) | 0.7996 | 1 | false |
| 275 | N | 2 NO₃⁻ + 4 H⁺ + 2 e⁻ ⇌ N₂O₄(g) + 2 H₂O | 2 NO₃⁻ + 4 H⁺ + 2 e⁻ | N₂O₄(g) + 2 H₂O | 0.803 | 2 | false |
| 276 | Fe | 2 FeO₄²⁻ + 5 H₂O + 6 e⁻ ⇌ Fe₂O₃(s) + 10 OH⁻ | 2 FeO₄²⁻ + 5 H₂O + 6 e⁻ | Fe₂O₃(s) + 10 OH⁻ | 0.81 | 6 | false |
| 277 | Au | AuBr₄⁻ + 3 e⁻ ⇌ Au(s) + 4 Br⁻ | AuBr₄⁻ + 3 e⁻ | Au(s) + 4 Br⁻ | 0.85 | 3 | false |
| 278 | Hg | Hg²⁺ + 2 e⁻ ⇌ Hg(l) | Hg²⁺ + 2 e⁻ | Hg(l) | 0.85 | 2 | false |
| 279 | Ir | IrCl₆²⁻ + e⁻ ⇌ IrCl₆³⁻ | IrCl₆²⁻ + e⁻ | IrCl₆³⁻ | 0.87 | 1 | false |
| 280 | Mn | MnO₄⁻ + H⁺ + e⁻ ⇌ HMnO₄⁻ | MnO₄⁻ + H⁺ + e⁻ | HMnO₄⁻ | 0.9 | 1 | false |
| 281 | Po | Po⁴⁺ + 2 e⁻ ⇌ Po²⁺ | Po⁴⁺ + 2 e⁻ | Po²⁺ | 0.9 | 2 | false |
| 282 | Hg | 2 Hg²⁺ + 2 e⁻ ⇌ Hg₂²⁺ | 2 Hg²⁺ + 2 e⁻ | Hg₂²⁺ | 0.91 | 2 | false |
| 283 | Pd | Pd²⁺ + 2 e⁻ ⇌ Pd(s) | Pd²⁺ + 2 e⁻ | Pd(s) | 0.915 | 2 | false |
| 284 | Au | AuCl₄⁻ + 3 e⁻ ⇌ Au(s) + 4 Cl⁻ | AuCl₄⁻ + 3 e⁻ | Au(s) + 4 Cl⁻ | 0.93 | 3 | false |
| 285 | N | NO₃⁻ + 3 H⁺ + 2 e⁻ ⇌ HNO₂(aq) | NO₃⁻ + 3 H⁺ + 2 e⁻ | HNO₂(aq) | 0.94 | 2 | false |
| 286 | Mn | MnO₂(s) + 4 H⁺ + e⁻ ⇌ Mn³⁺ + 2 H₂O | MnO₂(s) + 4 H⁺ + e⁻ | Mn³⁺ + 2 H₂O | 0.95 | 1 | false |
| 287 | N | NO₃⁻ + 4 H⁺ + 3 e⁻ ⇌ NO(g) + 2 H₂O | NO₃⁻ + 4 H⁺ + 3 e⁻ | NO(g) + 2 H₂O | 0.958 | 3 | false |
| 288 | Au | AuBr₂⁻ + e⁻ ⇌ Au(s) + 2 Br⁻ | AuBr₂⁻ + e⁻ | Au(s) + 2 Br⁻ | 0.96 | 1 | false |
| 289 | Fe | Fe₃O₄(s) + 8 H⁺ + 2 e⁻ ⇌ 3 Fe²⁺ + 4 H₂O | Fe₃O₄(s) + 8 H⁺ + 2 e⁻ | 3 Fe²⁺ + 4 H₂O | 0.98 | 2 | false |
| 290 | Xe | HXeO₆³⁻ + 2 H₂O + 2 e⁻ ⇌ HXeO₄⁻ + 4 OH⁻ | HXeO₆³⁻ + 2 H₂O + 2 e⁻ | HXeO₄⁻ + 4 OH⁻ | 0.99 | 2 | false |
| 291 | N | HNO₂(aq) + H⁺ + e⁻ ⇌ NO(g) + H₂O | HNO₂(aq) + H⁺ + e⁻ | NO(g) + H₂O | 0.996 | 1 | false |
| 292 | At | HAtO + H⁺ + e⁻ ⇌ At + H₂O | HAtO + H⁺ + e⁻ | At + H₂O | 1 | 1 | false |
| 293 | V | VO₂⁺ + 2 H⁺ + e⁻ ⇌ VO²⁺ + H₂O | VO₂⁺ + 2 H⁺ + e⁻ | VO²⁺ + H₂O | 1 | 1 | false |
| 294 | Te | H₆TeO₆(aq) + 2 H⁺ + 2 e⁻ ⇌ TeO₂(s) + 4 H₂O | H₆TeO₆(aq) + 2 H⁺ + 2 e⁻ | TeO₂(s) + 4 H₂O | 1.02 | 2 | false |
| 295 | N | NO₂(g) + 2 H⁺ + 2 e⁻ ⇌ NO(g) + H₂O | NO₂(g) + 2 H⁺ + 2 e⁻ | NO(g) + H₂O | 1.03 | 2 | false |
| 296 | Br | Br₃⁻ + 2 e⁻ ⇌ 3 Br⁻ | Br₃⁻ + 2 e⁻ | 3 Br⁻ | 1.05 | 2 | false |
| 297 | Sb | Sb₂O₅(s) + 2 H⁺ + 2 e⁻ ⇌ Sb₂O₄(s) + H₂O | Sb₂O₅(s) + 2 H⁺ + 2 e⁻ | Sb₂O₄(s) + H₂O | 1.055 | 2 | false |
| 298 | I | ICl₂⁻ + e⁻ ⇌ 2 Cl⁻ + I(s) | ICl₂⁻ + e⁻ | 2 Cl⁻ + I(s) | 1.06 | 1 | false |
| 299 | Br | Br₂(l) + 2 e⁻ ⇌ 2 Br⁻ | Br₂(l) + 2 e⁻ | 2 Br⁻ | 1.066 | 2 | false |
| 300 | N | N₂O₄(g) + 2 H⁺ + 2 e⁻ ⇌ 2 HNO₂ | N₂O₄(g) + 2 H⁺ + 2 e⁻ | 2 HNO₂ | 1.07 | 2 | false |
| 301 | Br | Br₂(aq) + 2 e⁻ ⇌ 2 Br⁻ | Br₂(aq) + 2 e⁻ | 2 Br⁻ | 1.0873 | 2 | false |
| 302 | Ru | RuO₂ + 4 H⁺ + 2 e⁻ ⇌ Ru²⁺ + 2 H₂O | RuO₂ + 4 H⁺ + 2 e⁻ | Ru²⁺ + 2 H₂O | 1.12 | 2 | false |
| 303 | Cu | Cu²⁺ + 2 CN⁻ + e⁻ ⇌ Cu(CN)₂⁻ | Cu²⁺ + 2 CN⁻ + e⁻ | Cu(CN)₂⁻ | 1.12 | 1 | false |
| 304 | I | IO₃⁻ + 5 H⁺ + 4 e⁻ ⇌ HIO(aq) + 2 H₂O | IO₃⁻ + 5 H⁺ + 4 e⁻ | HIO(aq) + 2 H₂O | 1.13 | 4 | false |
| 305 | O | H₂O₂(aq) + H⁺ + e⁻ ⇌ H₂O + HO• | H₂O₂(aq) + H⁺ + e⁻ | H₂O + HO• | 1.14 | 1 | false |
| 306 | Au | AuCl₂⁻ + e⁻ ⇌ Au(s) + 2 Cl⁻ | AuCl₂⁻ + e⁻ | Au(s) + 2 Cl⁻ | 1.15 | 1 | false |
| 307 | Se | HSeO₄⁻ + 3 H⁺ + 2 e⁻ ⇌ H₂SeO₃(aq) + H₂O | HSeO₄⁻ + 3 H⁺ + 2 e⁻ | H₂SeO₃(aq) + H₂O | 1.15 | 2 | false |
| 308 | Ag | Ag₂O(s) + 2 H⁺ + 2 e⁻ ⇌ 2 Ag(s) + H₂O | Ag₂O(s) + 2 H⁺ + 2 e⁻ | 2 Ag(s) + H₂O | 1.17 | 2 | false |
| 309 | Cl | ClO₃⁻ + 2 H⁺ + e⁻ ⇌ ClO₂(g) + H₂O | ClO₃⁻ + 2 H⁺ + e⁻ | ClO₂(g) + H₂O | 1.175 | 1 | false |
| 310 | Xe | HXeO₆³⁻ + 5 H₂O + 8 e⁻ ⇌ Xe(g) + 11 OH⁻ | HXeO₆³⁻ + 5 H₂O + 8 e⁻ | Xe(g) + 11 OH⁻ | 1.18 | 8 | false |
| 311 | Pt | Pt²⁺ + 2 e⁻ ⇌ Pt(s) | Pt²⁺ + 2 e⁻ | Pt(s) | 1.188 | 2 | false |
| 312 | Cl | ClO₂(g) + H⁺ + e⁻ ⇌ HClO₂(aq) | ClO₂(g) + H⁺ + e⁻ | HClO₂(aq) | 1.19 | 1 | false |
| 313 | I | 2 IO₃⁻ + 12 H⁺ + 10 e⁻ ⇌ I₂(s) + 6 H₂O | 2 IO₃⁻ + 12 H⁺ + 10 e⁻ | I₂(s) + 6 H₂O | 1.2 | 10 | false |
| 314 | Mn | MnO₂(s) + 4 H⁺ + 2 e⁻ ⇌ Mn²⁺ + 2 H₂O | MnO₂(s) + 4 H⁺ + 2 e⁻ | Mn²⁺ + 2 H₂O | 1.224 | 2 | false |
| 315 | O | O₂(g) + 4 H⁺ + 4 e⁻ ⇌ 2 H₂O | O₂(g) + 4 H⁺ + 4 e⁻ | 2 H₂O | 1.229 | 4 | false |
| 317 | Cl | ClO₄⁻ + 2 H⁺ + 2 e⁻ ⇌ ClO₃⁻ + H₂O | ClO₄⁻ + 2 H⁺ + 2 e⁻ | ClO₃⁻ + H₂O | 1.23 | 2 | false |
| 318 | Ru | [Ru(bipy)₃]³⁺ + e⁻ ⇌ [Ru(bipy)₃]²⁺ | [Ru(bipy)₃]³⁺ + e⁻ | [Ru(bipy)₃]²⁺ | 1.24 | 1 | false |
| 319 | Xe | HXeO₄⁻ + 3 H₂O + 6 e⁻ ⇌ Xe(g) + 7 OH⁻ | HXeO₄⁻ + 3 H₂O + 6 e⁻ | Xe(g) + 7 OH⁻ | 1.24 | 6 | false |
| 320 | N | 2 NO₃⁻ + 12 H⁺ + 10 e⁻ ⇌ N₂(g) + 6 H₂O | 2 NO₃⁻ + 12 H⁺ + 10 e⁻ | N₂(g) + 6 H₂O | 1.25 | 10 | false |
| 321 | Tl | Tl³⁺ + 2 e⁻ ⇌ Tl⁺ | Tl³⁺ + 2 e⁻ | Tl⁺ | 1.25 | 2 | false |
| 316 | N | N₂H₅⁺ + 3 H⁺ + 2 e⁻ ⇌ 2 NH₄⁺ | N₂H₅⁺ + 3 H⁺ + 2 e⁻ | 2 NH₄⁺ | 1.28 | 2 | false |
| 322 | N | 2 HNO₂(aq) + 4 H⁺ + 4 e⁻ ⇌ N₂O(g) + 3 H₂O | 2 HNO₂(aq) + 4 H⁺ + 4 e⁻ | N₂O(g) + 3 H₂O | 1.297 | 4 | false |
| 323 | Cr | Cr₂O₇²⁻ + 14 H⁺ + 6 e⁻ ⇌ 2 Cr³⁺ + 7 H₂O | Cr₂O₇²⁻ + 14 H⁺ + 6 e⁻ | 2 Cr³⁺ + 7 H₂O | 1.33 | 6 | false |
| 324 | N | NH₃OH⁺ + 2 H⁺ + 2 e⁻ ⇌ NH₄⁺ + H₂O | NH₃OH⁺ + 2 H⁺ + 2 e⁻ | NH₄⁺ + H₂O | 1.35 | 2 | false |
| 325 | Cl | Cl₂(g) + 2 e⁻ ⇌ 2 Cl⁻ | Cl₂(g) + 2 e⁻ | 2 Cl⁻ | 1.36 | 2 | false |
| 326 | Ru | RuO₄⁻ + 8 H⁺ + 5 e⁻ ⇌ Ru²⁺ + 4 H₂O | RuO₄⁻ + 8 H⁺ + 5 e⁻ | Ru²⁺ + 4 H₂O | 1.368 | 5 | false |
| 327 | Ru | RuO₄ + 4 H⁺ + 4 e⁻ ⇌ RuO₂ + 2 H₂O | RuO₄ + 4 H⁺ + 4 e⁻ | RuO₂ + 2 H₂O | 1.387 | 4 | false |
| 328 | Co | CoO₂(s) + 4 H⁺ + e⁻ ⇌ Co³⁺ + 2 H₂O | CoO₂(s) + 4 H⁺ + e⁻ | Co³⁺ + 2 H₂O | 1.42 | 1 | false |
| 329 | N | 2 NH₃OH⁺ + H⁺ + 2 e⁻ ⇌ N₂H₅⁺ + 2 H₂O | 2 NH₃OH⁺ + H⁺ + 2 e⁻ | N₂H₅⁺ + 2 H₂O | 1.42 | 2 | false |
| 330 | I | 2 HIO(aq) + 2 H⁺ + 2 e⁻ ⇌ I₂(s) + 2 H₂O | 2 HIO(aq) + 2 H⁺ + 2 e⁻ | I₂(s) + 2 H₂O | 1.44 | 2 | false |
| 331 | Br | BrO₃⁻ + 5 H⁺ + 4 e⁻ ⇌ HBrO(aq) + 2 H₂O | BrO₃⁻ + 5 H⁺ + 4 e⁻ | HBrO(aq) + 2 H₂O | 1.447 | 4 | false |
| 332 | Pb | β⁻PbO₂(s) + 4 H⁺ + 2 e⁻ ⇌ Pb²⁺ + 2 H₂O | β⁻PbO₂(s) + 4 H⁺ + 2 e⁻ | Pb²⁺ + 2 H₂O | 1.46 | 2 | false |
| 333 | Pb | α⁻PbO₂(s) + 4 H⁺ + 2 e⁻ ⇌ Pb²⁺ + 2 H₂O | α⁻PbO₂(s) + 4 H⁺ + 2 e⁻ | Pb²⁺ + 2 H₂O | 1.468 | 2 | false |
| 334 | Br | 2 BrO₃⁻ + 12 H⁺ + 10 e⁻ ⇌ Br₂(l) + 6 H₂O | 2 BrO₃⁻ + 12 H⁺ + 10 e⁻ | Br₂(l) + 6 H₂O | 1.48 | 10 | false |
| 335 | At | HAtO₃ + 4 H⁺ + 4 e⁻ ⇌ HAtO + 2 H₂O | HAtO₃ + 4 H⁺ + 4 e⁻ | HAtO + 2 H₂O | 1.5 | 4 | false |
| 336 | Mn | MnO₄⁻ + 8 H⁺ + 5 e⁻ ⇌ Mn²⁺ + 4 H₂O | MnO₄⁻ + 8 H⁺ + 5 e⁻ | Mn²⁺ + 4 H₂O | 1.51 | 5 | false |
| 337 | O | HO₂• + H⁺ + e⁻ ⇌ H₂O₂(aq) | HO₂• + H⁺ + e⁻ | H₂O₂(aq) | 1.51 | 1 | false |
| 338 | Au | Au³⁺ + 3 e⁻ ⇌ Au(s) | Au³⁺ + 3 e⁻ | Au(s) | 1.52 | 3 | false |
| 339 | Ru | RuO₄²⁻ + 8 H⁺ + 4 e⁻ ⇌ Ru²⁺ + 4 H₂O | RuO₄²⁻ + 8 H⁺ + 4 e⁻ | Ru²⁺ + 4 H₂O | 1.563 | 4 | false |
| 340 | N | 2 NO(g) + 2 H⁺ + 2 e⁻ ⇌ N₂O(g) + H₂O | 2 NO(g) + 2 H⁺ + 2 e⁻ | N₂O(g) + H₂O | 1.59 | 2 | false |
| 341 | Ni | NiO₂(s) + 2 H⁺ + 2 e⁻ ⇌ Ni²⁺ + 2 OH⁻ | NiO₂(s) + 2 H⁺ + 2 e⁻ | Ni²⁺ + 2 OH⁻ | 1.59 | 2 | false |
| 342 | Ce | Ce⁴⁺ + e⁻ ⇌ Ce³⁺ | Ce⁴⁺ + e⁻ | Ce³⁺ | 1.61 | 1 | false |
| 343 | Cl | 2 HClO(aq) + 2 H⁺ + 2 e⁻ ⇌ Cl₂(g) + 2 H₂O | 2 HClO(aq) + 2 H⁺ + 2 e⁻ | Cl₂(g) + 2 H₂O | 1.63 | 2 | false |
| 344 | I | IO₄⁻ + 2 H⁺ + 2 e⁻ ⇌ IO₃⁻ + H₂O | IO₄⁻ + 2 H⁺ + 2 e⁻ | IO₃⁻ + H₂O | 1.64 | 2 | false |
| 345 | Ag | Ag₂O₃(s) + 6 H⁺ + 4 e⁻ ⇌ 2 Ag⁺ + 3 H₂O | Ag₂O₃(s) + 6 H⁺ + 4 e⁻ | 2 Ag⁺ + 3 H₂O | 1.67 | 4 | false |
| 346 | Cl | HClO₂(aq) + 2 H⁺ + 2 e⁻ ⇌ HClO(aq) + H₂O | HClO₂(aq) + 2 H⁺ + 2 e⁻ | HClO(aq) + H₂O | 1.67 | 2 | false |
| 347 | Pb | Pb⁴⁺ + 2 e⁻ ⇌ Pb²⁺ | Pb⁴⁺ + 2 e⁻ | Pb²⁺ | 1.69 | 2 | false |
| 348 | Mn | MnO₄⁻ + 4 H⁺ + 3 e⁻ ⇌ MnO₂(s) + 2 H₂O | MnO₄⁻ + 4 H⁺ + 3 e⁻ | MnO₂(s) + 2 H₂O | 1.7 | 3 | false |
| 349 | Br | BrO₄⁻ + 2 H⁺ + 2 e⁻ ⇌ BrO₃⁻ + H₂O | BrO₄⁻ + 2 H⁺ + 2 e⁻ | BrO₃⁻ + H₂O | 1.74 | 2 | false |
| 350 | Ag | AgO(s) + 2 H⁺ + e⁻ ⇌ Ag⁺ + H₂O | AgO(s) + 2 H⁺ + e⁻ | Ag⁺ + H₂O | 1.77 | 1 | false |
| 351 | N | N₂O(g) + 2 H⁺ + 2 e⁻ ⇌ N₂(g) + H₂O | N₂O(g) + 2 H⁺ + 2 e⁻ | N₂(g) + H₂O | 1.77 | 2 | false |
| 352 | O | H₂O₂(aq) + 2 H⁺ + 2 e⁻ ⇌ 2 H₂O | H₂O₂(aq) + 2 H⁺ + 2 e⁻ | 2 H₂O | 1.78 | 2 | false |
| 353 | Au | Au⁺ + e⁻ ⇌ Au(s) | Au⁺ + e⁻ | Au(s) | 1.83 | 1 | false |
| 354 | Co | Co³⁺ + e⁻ ⇌ Co²⁺ | Co³⁺ + e⁻ | Co²⁺ | 1.92 | 1 | false |
| 355 | Ag | Ag²⁺ + e⁻ ⇌ Ag⁺ | Ag²⁺ + e⁻ | Ag⁺ | 1.98 | 1 | false |
| 356 | O | S₂O₈²⁻ + 2 e⁻ ⇌ 2 SO₄²⁻ | S₂O₈²⁻ + 2 e⁻ | 2 SO₄²⁻ | 2.01 | 2 | false |
| 357 | O | O₃(g) + 2 H⁺ + 2 e⁻ ⇌ O₂(g) + H₂O | O₃(g) + 2 H⁺ + 2 e⁻ | O₂(g) + H₂O | 2.075 | 2 | false |
| 358 | Mn | HMnO₄⁻ + 3 H⁺ + 2 e⁻ ⇌ MnO₂(s) + 2 H₂O | HMnO₄⁻ + 3 H⁺ + 2 e⁻ | MnO₂(s) + 2 H₂O | 2.09 | 2 | false |
| 359 | Xe | XeO₃(aq) + 6 H⁺ + 6 e⁻ ⇌ Xe(g) + 3 H₂O | XeO₃(aq) + 6 H⁺ + 6 e⁻ | Xe(g) + 3 H₂O | 2.12 | 6 | false |
| 360 | Xe | H₄XeO₆(aq) + 8 H⁺ + 8 e⁻ ⇌ Xe(g) + 6 H₂O | H₄XeO₆(aq) + 8 H⁺ + 8 e⁻ | Xe(g) + 6 H₂O | 2.18 | 8 | false |
| 361 | Fe | FeO₄²⁻ + 8 H⁺ + 3 e⁻ ⇌ Fe³⁺ + 4 H₂O | FeO₄²⁻ + 8 H⁺ + 3 e⁻ | Fe³⁺ + 4 H₂O | 2.2 | 3 | false |
| 362 | Xe | XeF₂(aq) + 2 H⁺ + 2 e⁻ ⇌ Xe(g) + 2 HF(aq) | XeF₂(aq) + 2 H⁺ + 2 e⁻ | Xe(g) + 2 HF(aq) | 2.32 | 2 | false |
| 363 | O | HO• + H⁺ + e⁻ ⇌ H₂O | HO• + H⁺ + e⁻ | H₂O | 2.38 | 1 | false |
| 364 | Xe | H₄XeO₆(aq) + 2 H⁺ + 2 e⁻ ⇌ XeO₃(aq) + 3 H₂O | H₄XeO₆(aq) + 2 H⁺ + 2 e⁻ | XeO₃(aq) + 3 H₂O | 2.42 | 2 | false |
| 365 | F | F₂(g) + 2 e⁻ ⇌ 2 F⁻ | F₂(g) + 2 e⁻ | 2 F⁻ | 2.87 | 2 | false |
| 366 | Cm | Cm⁴⁺ + e⁻ ⇌ Cm³⁺ | Cm⁴⁺ + e⁻ | Cm³⁺ | 3 | 1 | true |
| 367 | F | F₂(g) + 2 H⁺ + 2 e⁻ ⇌ 2 HF(aq) | F₂(g) + 2 H⁺ + 2 e⁻ | 2 HF(aq) | 3.077 | 2 | false |
| 368 | Tb | Tb⁴⁺ + e⁻ ⇌ Tb³⁺ | Tb⁴⁺ + e⁻ | Tb³⁺ | 3.1 | 1 | true |
| 369 | Pr | Pr⁴⁺ + e⁻ ⇌ Pr³⁺ | Pr⁴⁺ + e⁻ | Pr³⁺ | 3.2 | 1 | true |
| 370 | Kr | KrF₂(aq) + 2 e⁻ ⇌ Kr(g) + 2 F⁻ | KrF₂(aq) + 2 e⁻ | Kr(g) + 2 F⁻ | 3.27 | 2 | true |

Source: https://aidb.si/d/standard-electrode-potentials — Table from the Wikipedia article “Standard electrode potential (data page)” (CC BY-SA 4.0), compiled there mainly from the CRC Handbook of Chemistry and Physics and Bard, Parsons & Jordan.