| Li+(aq) + e− | → | Li(s) | -3.05 | Stretton |
| Li+ + e− | → | Li | -3.05 | Keefe |
| Li+ + e− | → | Li(s) | -3.045 | EMS |
| Ca(OH)2(s) + 2e− | → | Ca(s) + 2OH− | -3.03 | EMS |
| K+ + e− | → | K | -2.93 | Keefe |
| Rb+(aq) + e− | → | Rb(s) | -2.93 | Stretton |
| Rb+ + e− | → | Rb | -2.93 | Keefe |
| Rb+ + e− | → | Rb(s) | -2.93 | EMS |
| K+ + e− | → | K(s) | -2.925 | EMS |
| Cs+(aq) +e− | → | Cs(s) | -2.92 | Stretton |
| Cs+ + e− | → | Cs | -2.92 | Keefe |
| K+(aq) + e− | → | K(s) | -2.92 | Stretton |
| Ra2+ + 2e− | → | Ra | -2.92 | Keefe |
| Ra2+ + 2e− | → | Ra(s) | -2.92 | EMS |
| Cs+ + e− | → | Cs(s) | -2.91 | EMS |
| Ba2+ + 2e− | → | Ba(s) | -2.906 | EMS |
| Ba2+(aq) + 2e− | → | Ba(s) | -2.90 | Stretton |
| La(OH)3(s) + 3e− | → | La(s) + 3OH− | -2.90 | EMS |
| Sr2+ + 2e− | → | Sr | -2.89 | Keefe |
| Sr2+ + 2e− | → | Sr(s) | -2.89 | EMS |
| Sr2+(aq) + 2e− | → | Sr(s) | -2.89 | Stretton |
| Ca2+ + 2e− | → | Ca | -2.87 | Keefe |
| Ca2+ + 2e− | → | Ca(s) | -2.866 | EMS |
| Al3+ + 2e− | → | Al+ | -2.76 | EMS |
| Ca2+(aq) + 2e− | → | Ca(s) | -2.76 | Stretton |
| Na+ + e− | → | Na(s) | -2.714 | EMS |
| Na+(aq) + e− | → | Na(s) | -2.71 | Stretton |
| Na+ + e− | → | Na | -2.71 | Keefe |
| Mg(OH)2(s) + 2e− | → | Mg(s) + 2OH− | -2.69 | EMS |
| Be2O32− + 3H2O + 4e− | → | 2Be(s) + 6OH− | -2.62 | EMS |
| La3+ + 3e− | → | La | -2.52 | Keefe |
| La3+ + 3e− | → | La(s) | -2.52 | EMS |
| HfO(OH)2(s) + H2O + 4e− | → | Hf(s) + 4OH− | -2.50 | EMS |
| Ce3+ + 3e− | → | Ce | -2.48 | Keefe |
| Ce3+ + 3e− | → | Ce(s) | -2.48 | EMS |
| Th(OH)4(s) + 4e− | → | Th(s) + 4OH− | -2.48 | EMS |
| Pu(OH)3(s) + 3e− | → | Pu(s) + 3OH− | -2.42 | EMS |
| UO2(s) + 2H2O + 4e− | → | U(s) + 4OH− | -2.39 | EMS |
| Mg2+(aq) + 2e− | → | Mg(s) | -2.37 | Stretton |
| Y3+(aq) + 3e− | → | Y(s) | -2.37 | Stretton |
| Mg2+ + 2e− | → | Mg(s) | -2.363 | EMS |
| H2ZrO3(s) + H2O + 4e− | → | Zr(s) + 4OH− | -2.36 | EMS |
| La3+(aq) + 3e− | → | La(s) | -2.36 | Stretton |
| Mg2+ + 2e− | → | Mg | -2.36 | Keefe |
| Al(OH)3(s) + 3e− | → | Al(s) + 3OH− | -2.31 | EMS |
| H2(g) + 2e− | → | 2H− | -2.25 | EMS |
| U(OH)3(s) + 3e− | → | U(s) + 3OH− | -2.17 | EMS |
| BaO + 2H+ + 2e− | → | Ba(s) + H2O | -2.166 | EMS |
| Sc3+ + 3e− | → | Sc(s) | -2.08 | EMS |
| AlF63− + 3e− | → | Al(s) + 6F− | -2.07 | EMS |
| Pu3+ + 3e− | → | Pu(s) | -2.03 | EMS |
| Sc3+(aq) + 3e− | → | Sc(s) | -2.02 | Stretton |
| CaO + 2H+ + 2e− | → | Ca(s) + H2O | -1.90 | EMS |
| Th4+ + 4e− | → | Th(s) | -1.90 | EMS |
| Be2+ + 2e− | → | Be | -1.85 | Keefe |
| Be2+ + 2e− | → | Be(s) | -1.85 | EMS |
| U3+ + 3e− | → | U(s) | -1.798 | EMS |
| U3+ + 3e− | → | U | -1.79 | Keefe |
| U3+(aq) + 3e− | → | U(s) | -1.79 | Stretton |
| MgO(s) + 2H+ + 2e− | → | Mg(s) + H2O | -1.722 | EMS |
| Hf4+ + 4e− | → | Hf(s) | -1.70 | EMS |
| HfO2+ + 2H+ + 4e− | → | Hf(s) + H2O | -1.70 | EMS |
| Al3+ + 3e− | → | Al(s) | -1.662 | EMS |
| Al3+ + 3e− | → | Al | -1.66 | Keefe |
| Al3+(aq) + 3e− | → | Al(s) | -1.66 | Stretton |
| Ti2+ + 2e− | → | Ti | -1.63 | Keefe |
| Ti2+ + 2e− | → | Ti(s) | -1.630 | EMS |
| Ti2+(aq) + 2e− | → | Ti(s) | -1.63 | Stretton |
| HfO2(s) + 4H+ + 4e− | → | Hf(s) + 2H2O | -1.57 | EMS |
| ZrO2+ + 2H+ + 4e− | → | Zr(s) + H2O | -1.570 | EMS |
| ZrO2:2H2O + 4H+ + 4e− | → | Zr(s) + 4H2O | -1.553 | EMS |
| Mn(OH)2(s) + 2e− | → | Mn(s) + 2OH− | -1.55 | EMS |
| Zr4+ + 4e− | → | Zr(s) | -1.539 | EMS |
| ZrO2:H2O(s) + 4H+ + 4e− | → | Zr(s) + 3H2O | -1.533 | EMS |
| Pb(s) + 2H+ + 2e− | → | PbH2 | -1.507 | EMS |
| ZrO2(s) + 4H+ + 4e− | → | Zr(s) + 2H2O | -1.456 | EMS |
| UO2(s) + 4H+ + 4e− | → | U(s) + 2H2O | -1.444 | EMS |
| ZnS(s) + 2e− | → | Zn(s) + S2− | -1.40 | EMS |
| HZrO3− + 5H+ + 4e− | → | Zr(s) + 3H2O | -1.276 | EMS |
| AlO2− + 4H+ + 3e− | → | Al(s) + 2H2O | -1.262 | EMS |
| Zn(CN)42+ + 2e− | → | Zn(s) + 4CN− | -1.26 | EMS |
| Zn(OH)2(s) + 2e− | → | Zn(s) + 2OH− | -1.245 | EMS |
| H2GaO3− + 3e− | → | Ga(s) + 4OH− | -1.22 | EMS |
| ZnO22− + 2H2O + 2e− | → | Zn(s) + 4OH− | -1.216 | EMS |
| ZnO2−(aq) + 2 H2O(l)+ 2e− | → | Zn(s) + 4OH−(aq) | -1.216 | Stretton |
| SiF62− + 4e− | → | Si(s) + 6F− | -1.2 | EMS |
| TiF62− + 4e− | → | Ti(s) + 6F− | -1.19 | EMS |
| V2+ + 2e− | → | V | -1.19 | Keefe |
| Mn2+ + 2e− | → | Mn | -1.18 | Keefe |
| Mn2+ + 2e− | → | Mn(s) | -1.180 | EMS |
| V2+ + 2e− | → | V(s) | -1.18 | EMS |
| V2+(aq) + 2e− | → | V(s) | -1.18 | Stretton |
| CdS(s) + 2e− | → | Cd(s) + S2− | -1.17 | EMS |
| N2(g) + 4 H2O(l) + 4e− | → | N2O4(aq) +4 OH−(aq) | -1.16 | Stretton |
| Te(s) + 2e− | → | Te2− | -1.14 | EMS |
| Nb3+ + 3e− | → | Nb(s) | -1.1 | EMS |
| Cd(CN)42− + 2e− | → | Cd(s) + 4CN− | -1.09 | EMS |
| Sn(s) + 4H+ + 4e− | → | SnH4(g) | -1.074 | EMS |
| MoO42− + 4H2O + 6e− | → | Mo(s) + 8OH− | -1.05 | EMS |
| BF4− + 3e− | → | B(s) + 4F− | -1.04 | EMS |
| Zn(NH3)42+ + 2e− | → | Zn(s) + 4NH3 | -1.04 | EMS |
| In(OH)3 + 3e− | → | In(s) + 3OH− | -1.0 | EMS |
| NiS(s) + 2e− | → | Ni(s) + S2− | -0.99 | EMS |
| CNO− + 2H2O + 2e− | → | CN− + 2OH− | -0.97 | EMS |
| Pu(OH)4(s) + e− | → | Pu(OH)3(s) + OH− | -0.95 | EMS |
| 2H3PO4 + 2H+ + 2e− | → | H4P2O6 + 2H2O | -0.94 | EMS |
| SO42− + 4H2O + 2e− | → | SO3− + 2OH− | -0.93 | EMS |
| Se(s) + 2e− | → | Se2− | -0.924 | EMS |
| Cr2+ + 2e− | → | Cr | -0.91 | Keefe |
| Cr2+ + 2e− | → | Cr(s) | -0.91 | EMS |
| Cr2+(aq) + 2e− | → | Cr(s) | -0.91 | Stretton |
| Fe(OH)2(s) + 2e− | → | Fe(s)+ 2 OH−(aq) | -0.88 | Stretton |
| B(OH)3 + 3H+ + 3e− | → | B(s) + 3H2O | -0.87 | EMS |
| H3BO3 + 3H+ + 3e− | → | B(s) + 3H2O | -0.869 | EMS |
| SiO2(s) + 4H+ + 4e− | → | Si(s) + 2H2O | -0.86 | EMS |
| H2B4O7 + 12H+ + 12e− | → | 4B(s) + 7H2O | -0.836 | EMS |
| 2H2O + 2e− | → | H2 + 2OH− | -0.83 | Keefe |
| 2H2O + 2e− | → | H2(g) + 2OH− | -0.83 | EMS |
| 2 H2O(l) + 2e− | → | H2(g)+ 2 OH−(aq) | -0.83 | Stretton |
| Cd(OH)2 + 2e− | → | Cd + 2OH− | -0.81 | Keefe |
| Cd(OH)2(s) + 2e− | → | Cd(s) + 2OH− | -0.81 | EMS |
| Cd(OH)2(s) + 2e− | → | Cd(s)+ 2 OH−(aq) | -0.81 | Stretton |
| Ta2O5 + 10H+ + 10e− | → | 2Ta(s) + 5H2O | -0.81 | EMS |
| Bi(s) + 3H+ + 3e− | → | BiH3(g) | -0.800 | EMS |
| B4O72− + 14H+ + 12e− | → | 4B(s) + 7H2O | -0.792 | EMS |
| H2SiO3 + 4H+ + 4e− | → | Si(s) + 3H2O | -0.780 | EMS |
| TlI(s) + e− | → | Tl(s) + I− | -0.766 | EMS |
| Zn2+ + 2e− | → | Zn(s) | -0.763 | EMS |
| Zn2+ + 2e− | → | Zn | -0.76 | Keefe |
| Zn2+(aq) + 2e− | → | Zn(s) | -0.76 | Stretton |
| Cr3+ + 3e− | → | Cr(s) | -0.744 | EMS |
| Cr3+ + 3e− | → | Cr | -0.74 | Keefe |
| Cr3−(aq) + 3e− | → | Cr(s) | -0.74 | Stretton |
| Te(s) + 2H+ + 2e− | → | H2Te(g) | -0.739 | EMS |
| Co(OH)2(s) + 2e− | → | Co(s) + 2OH− | -0.73 | EMS |
| Ni3O4(s) + 2H2O + 2e− | → | 3HNiO2− + H+ | -0.718 | EMS |
| Ag2S(s) + 2e− | → | 2Ag(s) + S2− | -0.712 | EMS |
| HgS(s) + 2e− | → | Hg + S2− | -0.70 | EMS |
| H2BO3− + 4H+ + 3e− | → | B(s) + 3H2O | -0.687 | EMS |
| H2AsO3− + H2O + 3e− | → | As(s) + 4OH− | -0.68 | EMS |
| AsO43− + 3H2O + 2e− | → | H2AsO3− + 4OH− | -0.67 | EMS |
| HgS(s) + 2e− | → | Hg(l) + S2− | -0.67 | EMS |
| TiO2(s) + 4H+ + e− | → | Ti3+ + H2O | -0.666 | EMS |
| TlBr(s) + e− | → | Tl(s) + Br− | -0.657 | EMS |
| Nb2O5(s) + 10H+ + 10e− | → | 2Nb(s) + 5H2O | -0.65 | EMS |
| HSiO3− + 5H+ + 4e− | → | Si(s) + 3H2O | -0.632 | EMS |
| NbO(SO4)2− + 2H+ + 5e− | → | Nb(s) + H2O + 2SO42− | -0.63 | EMS |
| N3− + 7H2O + 6e− | → | N2H4 + NH3(g) + 7OH− | -0.62 | EMS |
| Cd(NH3)42+ + 2e− | → | Cd(s) + 4NH3 | -0.61 | EMS |
| U4+ + e− | → | U3+ | -0.61 | Keefe |
| As(s) + 3H+ + 3e− | → | AsH3(g) | -0.608 | EMS |
| U4+ + e− | → | U3+ | -0.607 | EMS |
| ReO4− + 2H2O + 3e− | → | ReO2(s) + 4OH− | -0.595 | EMS |
| ReO4− + 4H2O + 7e− | → | Re(s) + 8OH− | -0.584 | EMS |
| PbO(s) + H2O(l) + 2e− | → | Pb(s) + 2 OH−(aq) | -0.58 | Stretton |
| Ga3+ + 3e− | → | Ga(s) | -0.56 | EMS |
| Ga3+(aq) + 3e− | → | Ga(s) | -0.56 | Stretton |
| O2 + e− | → | O2− | -0.56 | Keefe |
| TlCl(s) + e− | → | Tl(s) + Cl− | -0.557 | EMS |
| Al+ + e− | → | Al(s) | -0.55 | EMS |
| UOH3+ + H+ + e− | → | U3+ + H2O | -0.538 | EMS |
| S22− + 2e− | → | 2S2− | -0.524 | EMS |
| Sb(s) + 3H+ + 3e− | → | SbH3(g) | -0.510 | EMS |
| Se(s) + H+ + 2e− | → | HSe− | -0.510 | EMS |
| H3PO3 + 3H+ + 3e− | → | P | EMS | |
| TiO2(s) + 4H+ + 2e− | → | Ti2+ + H2O | -0.502 | EMS |
| H3PO3 + 2H+ + 2e− | → | H3PO2 + H2O | -0.499 | EMS |
| 2CO2(g) + 2H+ + 2e− | → | H2C2O4 | -0.49 | EMS |
| In3+ + e− | → | In2+ | -0.49 | Keefe |
| Ni(NH3)62+ + 2e− | → | Ni(s) + 6NH3 | -0.49 | EMS |
| S + 2e− | → | S2− | -0.48 | Keefe |
| S(s) + 2e− | → | S2− | -0.476 | EMS |
| H2PO3− + 4H+ + 3e− | → | P | EMS | |
| Bi2O3(s) + 3H2O + 6e− | → | 2Bi(s) + 6OH− | -0.46 | EMS |
| SiO32− + 6H+ + 4e− | → | Si(s) + 3H2O | -0.455 | EMS |
| H3PO3 + 3H+ + 3e− | → | P | EMS | |
| H2PO4− + H+ + 2e− | → | HPO32− + H2O | -0.447 | EMS |
| Fe2+ + 2e− | → | Fe | -0.44 | Keefe |
| Fe2+ + 2e− | → | Fe(s) | -0.440 | EMS |
| Fe2+(aq) + 2e− | → | Fe(s) | -0.44 | Stretton |
| In3+ + 2e− | → | In+ | -0.44 | Keefe |
| HBO32− + 5H+ + 3e− | → | B(s) + 3H2O | -0.437 | EMS |
| H2PO3− + 4H+ + 3e− | → | P | EMS | |
| H3PO4 + 5H+ + 5e− | → | P | EMS | |
| Cr3+ + e− | → | Cr2+ | -0.41 | Keefe |
| Cr3+ + e− | → | Cr2+ | -0.408 | EMS |
| In3+ + 2e− | → | In+ | -0.404 | EMS |
| Cd2+ + 2e− | → | Cd(s) | -0.403 | EMS |
| Cd2+ + 2e− | → | Cd | -0.40 | Keefe |
| Cd2+(aq) + 2e− | → | Cd(s) | -0.40 | Stretton |
| Ga3+ + 2e− | → | Ga+ | -0.4 | EMS |
| In2+ + e− | → | In+ | -0.40 | Keefe |
| Ni(CN)42− + e− | → | Ni(CN)3− + CN− | -0.4 | EMS |
| Se(s) + 2H+ + 2e− | → | H2Se(g) | -0.399 | EMS |
| Pb3O4(s) + 2H2O + 2e− | → | 3HPbO2− + H+ | -0.390 | EMS |
| H2PO4− + 6H+ + 5e− | → | P | EMS | |
| H3PO4 + 5H+ + 5e− | → | P | EMS | |
| SiO2(s) + 8H+ + 8e− | → | SiH4(g) + 2H2O | -0.377 | EMS |
| Hg(CN)42− + 2e− | → | Hg(l) + 4CN− | -0.37 | EMS |
| Ti3+ + e− | → | Ti2+ | -0.37 | Keefe |
| Se(s) + 2H+ + 2e− | → | H2Se(g) | -0.369 | EMS |
| Ti3+ + e− | → | Ti2+ | -0.369 | EMS |
| PbSO4 + 2e− | → | Pb + SO42− | -0.36 | Keefe |
| PbSO4(s) + 2e− | → | Pb(s)+ SO42−(aq) | -0.36 | Stretton |
| H2PO4− + 6H+ + 5e− | → | P | EMS | |
| PbSO4 + 2e− | → | Pb(s) + SO42− | -0.350 | EMS |
| HPO32− + 5H+ + 3e− | → | P | EMS | |
| In3+ + 3e− | → | In(s) | -0.345 | EMS |
| TlOH + e− | → | Tl(s) + OH− | -0.344 | EMS |
| NbO3+ + 2H+ + 2e− | → | Nb3+ + H2O | -0.343 | EMS |
| In3+(aq) + 3e− | → | In(s) | -0.34 | Stretton |
| Tl+(aq) + e− | → | Tl(s) | -0.34 | Stretton |
| Tl+ + e− | → | Tl | -0.34 | Keefe |
| H2SiO3 + 8H+ + 8e− | → | SiH4(g) + 3H2O | -0.339 | EMS |
| Tl+ + e− | → | Tl(s) | -0.336 | EMS |
| H3PO4 + H+ + 2e− | → | H2PO3− + H2O | -0.329 | EMS |
| HPO42− + 7H+ + 5e− | → | P | EMS | |
| Ag(CN)2− + e− | → | Ag(s) + 2CN− | -0.31 | EMS |
| HPO32− + 5H+ + 3e− | → | P | EMS | |
| GeO(s) + 2H+ + 2e− | → | Ge(s) + H2O | -0.29 | EMS |
| HPO42− + 7H+ + 5e− | → | P | EMS | |
| H3PO4 + 8H+ + 8e− | → | PH3(g) + 4H2O | -0.281 | EMS |
| Co2+ + 2e− | → | Co | -0.28 | Keefe |
| Co2+(aq) +2e− | → | Co(s) | -0.28 | Stretton |
| Co2+ + 2e− | → | Co(s) | -0.277 | EMS |
| H3PO4 + 2H+ + 2e− | → | H3PO3 + H2O | -0.276 | EMS |
| H2PO4− + 9H+ + 8e− | → | PH3(g) + 4H2O | -0.265 | EMS |
| HSiO3− + 9H+ + 8e− | → | SiH4(g) + 3H2O | -0.265 | EMS |
| H2PO4− + 2H+ + 2e− | → | H2PO3− + H2O | -0.260 | EMS |
| V3+ + e− | → | V2+ | -0.26 | Keefe |
| V3+ + e− | → | V2+ | -0.256 | EMS |
| GeO2(s) + 4H+ + 2e− | → | Ge2+ + 2H2O | -0.25 | EMS |
| Ni2+ + 2e− | → | Ni(s) | -0.250 | EMS |
| Ni2+(aq) + 2e− | → | Ni(s) | -0.25 | Stretton |
| Mn(CN)63− + e− | → | Mn(CN)64− | -0.244 | EMS |
| HPO42− + 2H+ + 2e− | → | HPO32− + H2O | -0.234 | EMS |
| N2(g) + 5H+ + 4e− | → | N2H5+ | -0.23 | EMS |
| Ni2+ + 2e− | → | Ni | -0.23 | Keefe |
| HPO42− + 10H+ + 8e− | → | PH3(g) + 4H2O | -0.212 | EMS |
| CO2(g) + 2H+ + 2e− | → | HCOOH | -0.20 | EMS |
| MoIII + 3e− | → | Mo(s) | -0.2 | EMS |
| CuI(s) + e− | → | Cu(s) + I− | -0.185 | EMS |
| SiO32− + 10H+ + 8e− | → | SiH4(g) + 3H2O | -0.176 | EMS |
| BO33− + 6H+ + 3e− | → | B(s) + 3H2O | -0.165 | EMS |
| HMnO2− + 3H+ + 2e− | → | Mn(s) + 2H2O | -0.163 | EMS |
| PO43− + 8H+ + 5e− | → | P | EMS | |
| AgI(s) + e− | → | Ag(s) + I− | -0.151 | EMS |
| AgI + e− | → | Ag + I− | -0.15 | Keefe |
| AgI(s) + e− | → | Ag(s) +I−(aq) | -0.15 | Stretton |
| OsO2(s) + 2H2O + 4e− | → | Os(s) + 4OH− | -0.15 | EMS |
| In+ + e− | → | In | -0.14 | Keefe |
| Sn2+ + 2e− | → | Sn | -0.14 | Keefe |
| Sn2+(aq) + 2e− | → | Sn(s) | -0.14 | Stretton |
| Sn2+ + 2e− | → | Sn(s) | -0.136 | EMS |
| TiO2+ + 2H+ + 2e− | → | Ti2+ + H2O | -0.135 | EMS |
| CrO42− + 4H2O + 3e− | → | Cr(OH)3(s) + 5OH− | -0.13 | EMS |
| H2GeO3 + 4H+ + 4e− | → | Ge(s) + 3H2O | -0.13 | EMS |
| Pb2+ + 2e− | → | Pb | -0.13 | Keefe |
| Pb2+(aq) + 2e− | → | Pb(s) | -0.13 | Stretton |
| PO43− + 8H+ + 5e− | → | P | EMS | |
| Pb2+ + 2e− | → | Pb(s) | -0.126 | EMS |
| PO43− + 11H+ + 8e− | → | PH3(g) + 4H2O | -0.123 | EMS |
| CO2(g) + 2H+ + 2e− | → | CO(g) + H2O | -0.12 | EMS |
| Cu(NH3)2+ + e− | → | Cu(s) + 2NH3 | -0.12 | EMS |
| WO2(s) + 4H+ + 4e− | → | W(s) + 2H2O | -0.12 | EMS |
| P + 3H+ + 3e− | → | PH3(g) | -0.111 | EMS |
| NbO(SO4)2− + 2H+ + 2e− | → | Nb3+ + H2O + 2SO42− | -0.1 | EMS |
| WO3(s) + 6H+ + 6e− | → | W(s) + 3H2O | -0.09 | EMS |
| VOH2+ + H+ + e− | → | V2+ + H2O | -0.082 | EMS |
| O2 + H2O + 2e− | → | HO2− + OH− | -0.08 | Keefe |
| Cu(NH3)42+ + 2e− | → | Cu(s) + 4NH3 | -0.07 | EMS |
| S(s) + H+ + 2e− | → | HS− | -0.065 | EMS |
| P + 3H+ + 3e− | → | PH3(g) | -0.063 | EMS |
| HZnO2− + 3H+ + 2e− | → | Zn(s) + 2H2O | -0.054 | EMS |
| VO2+ + e− | → | VO+ | -0.044 | EMS |
| Fe3+ + 3e− | → | Fe | -0.04 | Keefe |
| Fe3+ + 3e− | → | Fe(s) | -0.04 | EMS |
| Hg2I2(s) + 2e− | → | 2Hg(l) + 2I− | -0.04 | EMS |
| Ag2S(s) + 2H+ + 2e− | → | 2Ag(s) + H2S(g) | -0.036 | EMS |
| W2O5(s) + 2H+ + 2e− | → | 2WO2(s) + H2O | -0.031 | EMS |
| 2WO3(s) + 2H+ + 2e− | → | W2O5(s) + H2O | -0.029 | EMS |
| Cu(NH3)42+ + e− | → | Cu(NH3)2+ + 2NH3 | -0.01 | EMS |
| GeO2(s) + 4H+ + 4e− | → | Ge + 2H2O | -0.01 | EMS |
| 2H+ + 2e− | → | H2 | 0 | Keefe |
| 2H+ + 2e− | → | H2(g) | -0.005 | EMS |
| 2H+ + 2e− | → | H2(g) | -0.005 | EMS |
| 2H+ + 2e− | → | H2(g) | -0.41 | EMS |
| 2H+ + 2e− | → | H2(g) | s0.000 | EMS |
| 2 H+(aq) + 2e− | → | H2(g) | 0.00 | Stretton |
| 2Hg2+ + 2e− | → | Hg22+ | +0.907 | EMS |
| AgCl(s) + e− | → | Ag(s) + Cl− | +0.228 | EMS |
| Ag+ + e− | → | Ag(s) | +0.228 | EMS |
| Ag+ + e− | → | Ag(s) | +0.77 | EMS |
| Ag+ + e− | → | Ag(s) | +0.792 | EMS |
| C6H4O2 + 2H+ + 2e− | → | C6H4(OH)2 | +0.696 | EMS |
| C6H4O2 + 2H+ + 2e− | → | C6H4(OH)2 | +0.696 | EMS |
| C6H4O2 + 2H+ + 2e− | → | C6H4(OH)2 | +0.696 | EMS |
| C6H4O2 + 2H+ + 2e− | → | C6H4(OH)2 | +0.699 | EMS |
| Ce(ClO4)62− + e− | → | Ce3+ + 6ClO4− | +1.70 | EMS |
| Ce(NO3)62− + e− | → | Ce3+ + 6NO3− | +1.61 | EMS |
| Ce(SO4)32− + e− | → | Ce3+ + 3SO42− | +1.44 | EMS |
| Fe3+ + e− | → | Fe2+ | +0.68 | EMS |
| Fe3+ + e− | → | Fe2+ | +0.700 | EMS |
| Fe3+ + e− | → | Fe2+ | +0.732 | EMS |
| Fe(CN)63− + e− | → | Fe(CN)64− | +0.71 | EMS |
| Fe(CN)63− + e− | → | Fe(CN)64− | +0.72 | EMS |
| Fe(CN)63− + e− | → | Fe(CN)64− | +0.72 | EMS |
| Ge2+ + 2e− | → | Ge(s) | +0.00 | EMS |
| H3AsO4 + 2H+ + 2e− | → | H3AsO3 + H2O | +0.577 | EMS |
| H3AsO4 + 2H+ + 2e− | → | H3AsO3 + H2O | +0.577 | EMS |
| Hg22+ + 2e− | → | 2Hg(l) | +0.274 | EMS |
| Hg22+ + 2e− | → | 2Hg(l) | +0.674 | EMS |
| Hg22+ + 2e− | → | 2Hg(l) | +0.776 | EMS |
| Hg2Cl2(s) + 2e− | → | 2Hg(l) + 2Cl− | +0.244 | EMS |
| Hg2Cl2(s) + 2e− | → | 2Hg(l) + 2Cl− | +0.282 | EMS |
| Hg2Cl2(s) + 2e− | → | 2Hg(l) + 2Cl− | +0.334 | EMS |
| Mn3+ + e− | → | Mn2+ | +1.51 | EMS |
| MnIII + e− | → | MnII | +1.59 | EMS |
| MnIV + e− | → | MnIII | +1.65 | EMS |
| MnO42− + 2H2O + 2e− | → | MnO2(s) + 4OH− | +0.51 | EMS |
| MoVI + e− | → | MoV | +0.43 | EMS |
| NbV + 2e− | → | NbIII | -0.373 | EMS |
| NO3− + 3H+ + 2e− | → | HNO2 + H2O | +0.92 | EMS |
| O2(g) + 4H+ + 4e− | → | 2H2O | +0.815 | EMS |
| Os2+ + 2e− | → | Os(s) | +0.85 | EMS |
| Pb2+ + 2e− | → | Pb(s) | -0.14 | EMS |
| Pb2+ + 2e− | → | Pb(s) | -0.29 | EMS |
| PdBr62− + 2e− | → | PdBr42− + 2Br− | +0.994 | EMS |
| PdCl62− + 2e− | → | PdCl42− + 2Cl− | +1.288 | EMS |
| PdO2(s) + 2H+ + 2e− | → | PdO(s) + H2O | +0.95 | EMS |
| PdO3(s) + 2H+ + 2e− | → | PdO2(s) + H2O | +1.22 | EMS |
| SbV + 2e− | → | SbIII | +0.746 | EMS |
| SbV + 2e− | → | SbIII | +0.818 | EMS |
| Sn2+ + 2e− | → | Sn(s) | -0.16 | EMS |
| Sn4+ + 2e− | → | Sn2+ | +0.14 | EMS |
| Ti4+ + e− | → | Ti3+ | 0.00 | Keefe |
| TiIV + 4e− | → | Ti(s) | -0.88 | EMS |
| TiIV + e− | → | TiIII | -0.092 | EMS |
| TiO2+ + 2H+ + e− | → | Ti3+ + H2O | +0.04 | EMS |
| V3+ + e− | → | V2+ | -0.21 | EMS |
| V(OH)4+ + 2H+ + e− | → | VO2+ + 3H2O | +1.02 | EMS |
| V(OH)4+ + 2H+ + e− | → | VO2+ + 3H2O | +1.02 | EMS |
| S52− + 5H+ + 8e− | → | 5HS− | +0.003 | EMS |
| Sn4+ + 4e− | → | Sn(s) | +0.01 | EMS |
| Ag(S2O3)23− + e− | → | Ag(s) + 2S2O32− | +0.017 | EMS |
| Tl2O3 + 3H2O + 4e− | → | 2Tl+ + 6OH− | +0.02 | EMS |
| S2O62− + 2e− | → | 2SO32− | +0.026 | EMS |
| S42− + 4H+ + 6e− | → | 4HS− | +0.033 | EMS |
| WO42− + 8H+ + 6e− | → | W(s) + 4H2O | +0.049 | EMS |
| SeO42− + H2O + 2e− | → | SeO32− + 2OH− | +0.05 | EMS |
| UO22+ + e− | → | UO2+ | +0.052 | EMS |
| N2(g) + 6H+ + 6e− | → | 2NH3(g) | +0.057 | EMS |
| AgBr(s) + e− | → | Ag(s)+ Br−(aq) | +0.07 | Stretton |
| Pd(OH)2(s) + 2e− | → | Pd(s) + 2OH− | +0.07 | EMS |
| AgBr(s) + e− | → | Ag(s) + Br− | +0.073 | EMS |
| O2(g) + H2O + 2e− | → | HO2− + OH− | +0.076 | EMS |
| AgBr + e− | → | Ag + Br− | 0.0713 | Keefe |
| S4O62− + 2e− | → | 2S2O32− | +0.08 | EMS |
| N2(g) + 2H2O + 6H+ + 6e− | → | 2NH:H2O | +0.092 | EMS |
| S32− + 3H+ + 4e− | → | 3HS− | +0.097 | EMS |
| TiO2+ + 2H+ + e− | → | Ti3+ + H2O | +0.099 | EMS |
| Co(NH3)63+ + e− | → | Co(NH3)62+ | +0.1 | EMS |
| HgO(s) + H2O + 2e− | → | Hg(l) + 2OH− | +0.10 | EMS |
| Ir2O3 + 3H2O + 6e− | → | 2Ir(s) + 6OH− | +0.1 | EMS |
| IrO2(s) + 2H2O + 4e− | → | Ir(s) + 4OH− | +0.1 | EMS |
| Mn(OH)3(s) + e− | → | Mn(OH)2(s) + 2OH− | +0.1 | EMS |
| NO3− + H2O + 2e− | → | NO2− + 2OH− | 0.10 | Keefe |
| OsO42− + 2H2O + 2e− | → | OsO2(s) + 4OH− | +0.1 | EMS |
| Si(s) + 4H+ + 4e− | → | SiH4(g) | +0.102 | EMS |
| PO43− + 3H+ + 2e− | → | HPO32− + H2O | +0.121 | EMS |
| TeO2+ + 5H+ + 6e− | → | H2Te(g) + 2H2O | +0.121 | EMS |
| VO+ + 2H+ + e− | → | V2+ + H2O | +0.126 | EMS |
| Te4+ + 2H+ + 6e− | → | H2Te(g) | +0.132 | EMS |
| Hg2Br2(s) + 2e− | → | 2Hg(l) + 2Br− | +0.14 | EMS |
| S(s) + 2H+(aq) + 2e− | → | H2S(g) | +0.14 | Stretton |
| S(s) + 2H+ + 2e− | → | H2S(g) | +0.141 | EMS |
| SO42− + 8H+ + 8e− | → | S2− + 4H2O | +0.149 | EMS |
| Pt(OH)2(s) + 2e− | → | Pt(s) + 2OH− | +0.15 | EMS |
| Sn4+ + 2e− | → | Sn2+ | 0.15 | Keefe |
| Sn4+(aq) + 2e− | → | Sn2+(aq) | +0.15 | Stretton |
| Sb2O3(s) + 6H+ + 6e− | → | 2Sb(s) + 3H2O | +0.152 | EMS |
| Cu2+ + e− | → | Cu+ | +0.153 | EMS |
| MoO42− + 8H+ + 6e− | → | Mo(s) + 4H2O | +0.154 | EMS |
| Sn4+ + 2e− | → | Sn2+ | +0.154 | EMS |
| BiCl4− + 3e− | → | Bi(s) + 4Cl− | +0.16 | EMS |
| BiOCl(s) + 2H+ + 3e− | → | Bi(s) + H2O + Cl− | +0.160 | EMS |
| Cu2+(aq) + e− | → | Cu+(aq) | +0.16 | Stretton |
| Cu2+ + e− | → | Cu+ | 0.16 | Keefe |
| V2O3 + 6H+ + 2e− | → | 2V2+ + 3H2O | +0.161 | EMS |
| VO2+ + H+ + e− | → | VOH2+ | +0.164 | EMS |
| S4O62−(aq) + 2e− | → | 2 S2O32−(aq) | +0.169 | Stretton |
| CoO(OH)(s) + H2O + e− | → | Co(OH)2(s) + OH− | +0.17 | EMS |
| SO42− + 4H+ + 2e− | → | H2SO3 + H2O | +0.172 | EMS |
| SO42−(aq) + 4H+(aq)+ 2e− | → | H2SO3(aq) + H2O(l) | +0.172 | Stretton |
| 2Cu2+ + H2O + 2e− | → | Cu2O(s) + 2H+ | +0.20 | EMS |
| Bi3+ + 3e− | → | Bi | 0.20 | Keefe |
| MnO2(s) + 4H+ + 2e− | → | Mn2+ + 2H2O | +0.21 | EMS |
| SbO+ + 2H+ + 3e− | → | Sb(s) + H2O | +0.212 | EMS |
| Bi3+ + 3e− | → | Bi(s) | +0.215 | EMS |
| AgCl + e− | → | Ag + Cl− | 0.22 | Keefe |
| AgCl(s) + e− | → | Ag(s) + Cl− | +0.222 | EMS |
| AgCl(s) + e− | → | Ag(s)+ Cl−(aq) | +0.2223 | Stretton |
| HSbO2 + 3H+ + 3e− | → | Sb(s) + 2H2O | +0.230 | EMS |
| SO32− + 6H+ + 6e− | → | S2− + 3H2O | +0.231 | EMS |
| As2O3(s) + 6H+ + 6e− | → | 2As(s) + 3H2O | +0.234 | EMS |
| V2O4 + 4H+ + 2e− | → | 2VO+ + 2H2O | +0.246 | EMS |
| H3AsO3 + 3H+ + 3e− | → | As(s) + 3H2O | +0.248 | EMS |
| Pb3O4(s) + H2O + 2e− | → | 3PbO(s) + 2OH− | +0.249 | EMS |
| PbO(s) + 2H+ + 2e− | → | Pb(s) + H2O | +0.249 | EMS |
| PbO2(s) + H2O(l) + 2e− | → | PbO(s) + 2 OH−(aq) | +0.25 | Stretton |
| SO42− + 9H+ + 8e− | → | HS− + 4H2O | +0.252 | EMS |
| AsO+ + 2H+ + 3e− | → | As(s) + H2O | +0.254 | EMS |
| BiOH2+ + H+ + 3e− | → | Bi(s) + H2O | +0.254 | EMS |
| ReO2(s) + 4H+ + 4e− | → | Re(s) + 2H2O | +0.26 | EMS |
| U3O8(s) + 4H+ + 4e− | → | 3UO2 + 2H2O | +0.260 | EMS |
| Hg2Cl2(s) + 2e− | → | 2Hg(l) + 2Cl− | +0.268 | EMS |
| Hg2Cl2 + 2e− | → | 2Hg + Cl− | 0.27 | Keefe |
| Hg2Cl2(s) + 2e− | → | 2 Hg(l)+ 2 Cl−(aq) | +0.27 | Stretton |
| N2(g) + 8H+ + 6e− | → | 2NH4+ | +0.275 | EMS |
| SeO32− + 6H+ + 6e− | → | Se2− + 3H2O | +0.276 | EMS |
| HSO4− + 9H+ + 8e− | → | H2S(g) + 4H2O | +0.289 | EMS |
| Cr2O72− + 14H+ + 12e− | → | 2Cr(s) + 7H2O | +0.29 | EMS |
| 3PbO2(s) + 2H2O + 4e− | → | Pb3O4(s) + 4OH− | +0.295 | EMS |
| S22− + 2H+ + 2e− | → | 2HS− | +0.298 | EMS |
| UO22+ + 3H+ + 2e− | → | UOH3+ + H2O | +0.299 | EMS |
| HOsO5− + 2e− | → | OsO42− + OH− | +0.3 | EMS |
| Re3+ +3e− | → | Re(s) | +0.3 | EMS |
| RuCl5− + 2e− | → | Ru2+ + 5Cl− | +0.3 | EMS |
| SO42− + 10H+ + 8e− | → | H2S(g) + 4H2O | +0.303 | EMS |
| BiO+ + 2H+ + 3e− | → | Bi(s) + H2O | +0.320 | EMS |
| 2HCNO + 2H+ + 2e− | → | (CN)2(g) + 2H2O | +0.33 | EMS |
| ClO3− + H2O + 2e− | → | ClO2− + 2OH− | +0.33 | EMS |
| HSnO2− + 3H+ + 2e− | → | Sn(s) + 2H2O | +0.333 | EMS |
| UO22+ + 4H+ + 2e− | → | U4+ + 2H2O | +0.334 | EMS |
| Cu2+ + 2e− | → | Cu(s) | +0.337 | EMS |
| HSO4− + 7H+ + 6e− | → | S(s) + 4H2O | +0.339 | EMS |
| Cu2+ + 2e− | → | Cu | 0.34 | Keefe |
| Cu2+(aq) + 2e− | → | Cu(s) | +0.34 | Stretton |
| In3+ + 3e− | → | In | 0.34 | Keefe |
| Ag2O(s) + H2O + 2e− | → | 2Ag(s) + 2OH− | +0.342 | EMS |
| HSeO3− + 6H+ + 6e− | → | HSe− + 3H2O | +0.349 | EMS |
| SbO3− + 2H+ + 2e− | → | SbO2− + H2O | +0.353 | EMS |
| SO42− + 8H+ + 6e− | → | S(s) + 4H2O | +0.357 | EMS |
| VO2+ + 2H+ + e− | → | V3+ + H2O | +0.359 | EMS |
| ClO4− + H2O + 2e− | → | ClO3− + 2OH− | +0.36 | EMS |
| ClO4− + H2O + 2e− | → | ClO3− + 2OH− | 0.36 | Keefe |
| CrO42− + 2H+ + 3e− | → | CrO33− + H2O | +0.36 | EMS |
| [Fe(CN)6]3− + e− | → | [Fe(CN)4]4− | 0.36 | Keefe |
| Fe(CN)63− + e− | → | Fe(CN)64− | +0.36 | EMS |
| H2SeO3 + 6H+ + 6e− | → | H2Se(g) + 3H2O | +0.360 | EMS |
| HTiO2− + 5H+ + 2e− | → | Ti2+ + 3H2O | +0.362 | EMS |
| (CN)2(g) + 2H+ + 2e− | → | 2HCN | +0.37 | EMS |
| ReO4− + 8H+ + 7e− | → | Re(s) + 4H2O | +0.37 | EMS |
| SnO32− + 3H+ + 2e− | → | HSnO2− + H2O | +0.374 | EMS |
| H4P2O6 + 2H+ + 2e− | → | 2H3PO3 | +0.38 | EMS |
| HSeO3− + 7H+ + 6e− | → | H2Se(g) + 3H2O | +0.386 | EMS |
| WO42− + 4H+ + e− | → | WO2(s) + 2H2O | +0.386 | EMS |
| HMoO4− + 7H+ + 3e− | → | Mo3+ + 4H2O | +0.390 | EMS |
| 2ClO− + 2H2O + 2e− | → | Cl2(g) + 4OH− | +0.40 | EMS |
| H2MoO4(aq) + 2H+ + e− | → | MoO2+ + 2H2O | +0.4 | EMS |
| O2 + 2H2O + 4e− | → | 4OH− | 0.40 | Keefe |
| OsCl63− + e− | → | Os2+ + 6Cl− | +0.4 | EMS |
| O2(g) + 2H2O + 4e− | → | 4OH− | +0.401 | EMS |
| O2(g) + 2 H2O(l) + 4e− | → | 4 OH−(aq) | +0.401 | Stretton |
| SeO32− + 7H+ + 6e− | → | HSe− + 3H2O | +0.414 | EMS |
| S4O62− + 12H+ + 10e− | → | 4S(s) + 6H2O | +0.416 | EMS |
| Hg2C2O4(s) + 2e− | → | 2Hg(l) + C2O42− | +0.42 | EMS |
| H2AsO3− + 4H+ + 3e− | → | As(s) + 3H2O | +0.429 | EMS |
| HMoO4− + 3H+ + 2e− | → | MoO2 + 2H2O | +0.429 | EMS |
| RhCl63− + 3e− | → | Rh(s) + 6Cl− | +0.44 | EMS |
| ZnO22− + 4H+ + 2e− | → | Zn(s) + 2H2O | +0.441 | EMS |
| Ag2CrO4(s) + 2e− | → | 2Ag(s) + CrO42− | +0.446 | EMS |
| SbO2− + 4H+ + 3e− | → | Sb(s) + 2H2O | +0.446 | EMS |
| 2BrO− + 2H2O + 2e− | → | Br2(l) + 4OH− | +0.45 | EMS |
| Ag2CrO4 + 2e− | → | 2Ag + CrO42− | 0.45 | Keefe |