Standard Electrode Potentials in Basic Media

Half-reaction Eo, V ClO- + H2O + 2e- Cl- + 2OH- 0.89 HO2- + H2O + 2e- 3OH- 0.88 BrO- + H2O + 2e- Br- + 2OH- 0.76 ClO2- + 2H2O + 4e- Cl- + 4OH- 0.76 ClO3- + 3H2O + 6e- Cl-+ 6OH- 0.62 BrO3- + 3H2O + 6e- Br- + 6OH- 0.61 MnO42- + 2H2O + 2e- MnO2 + 4OH- 0.60 MnO4-+ 2H2O + 3e- MnO2 + 4OH- 0.59 IO- + H2O + 2e- I-+ 2OH- 0.49 O2 + 2H2O + 4e- 4OH- 0.40 ClO4- + H2O + 2e- ClO3- + 2OH- 0.36 Ag2O + H2O + 2e- 2Ag + 2OH- 0.34 IO3 - + 3H2O + 6e- I- + 6OH- 0.26 NO3- + H2O + 2e- NO2- + 2OH- 0.01 O2 + H2O + 2e- HO2- + OH- -0.08

Half-reaction Eo, V 2Cu(OH)2+ 2e- Cu2O + 2OH- + H2O -0.09 CrO42- + 4H2O + 3e- Cr(OH)3 + 5OH- -0.12 Cu(OH)2 + 2e- Cu + 2OH- -0.22 Bi2O3 + 3H2O + 6e- 2Bi + 6OH- -0.46 NO- + H2O + e- NO + 2OH- -0.46 S + H2O + 2e- HS- + OH- -0.48 HPbO2- + H2O + 2e- Pb + 3OH- -0.54 Fe(OH)3 + e- Fe(OH)2+ OH- -0.56 PbO + H2O + 2e- Pb + 2OH- -0.58 Ni(OH) 2 + 2e- Ni + 2OH- -0.72 Co(OH)2+ 2e- Co + 2OH- -0.73 Cd(OH) 2 + 2e- Cd + 2OH- -0.82 2H2O + 2e- H2+ 2OH- -0.83 SO42- + H2O + 2e- SO32- + 2OH- -0.93 Zn(OH)2 + 2e- Zn + 2OH- -1.25