Table of Standard Electrode Potentials

Table of Standard Electrode (Reduction) Potentials

Cathode (Reduction)
Half-Reaction / Standard Potential
E° (V)
F2 (g) + 2 e-® 2 F- (aq) / +2.866 *
O3 (g) + 2 H+ (aq) + 2 e-® O2 (g) + H2O (l) / +2.076 *
S2O82– (aq) + 2 e-® 2 SO42– (aq) / +2.010 *
Co3+ (aq) + e- ® Co2+ (aq) / +1.92 *
H2O2 (aq) + 2 H+ (aq) + 2 e-® 2 H2O (l) / +1.776 *
Ce4+ (aq) + e- ® Ce3+ (aq) / +1.7432
Au+ (aq) + e- ® Au (s) / +1.692 *
PbO2 (s) + SO42- (aq) + 4 H+ (aq) + 2 e-® PbSO4 (s) + 2 H2O (l) / +1.6913 *
MnO4- (aq) + 4 H+ (aq) + 3 e- ® MnO2 (s) + 2 H2O (l) / +1.679 *
MnO4- (aq) + 8 H+ (aq) + 5 e-® Mn2+ (aq) + 4 H2O (l) / +1.507 *
Au3+ (aq) + 3 e-® Au (s) / +1.498 *
PbO2 (s) + 4 H+ (aq) + 2 e-® Pb2+ (aq) + 2 H2O (l) / +1.455 *
Cl2 (g) + 2 e- ® 2 Cl- (aq) / +1.35827 *
Cr2O72- (aq) + 14 H+ (aq) + 6 e- ® 2 Cr3+ (aq) + 7 H2O (l) / +1.232 *
MnO2 (s) + 4 H+ (aq) + 2 e- ® Mn2+ (aq) + 2 H2O (l) / +1.224 *
O2 (g) + 4 H+ (aq) + 4 e- ® 2 H2O (l) / +1.2288
2 IO3- (aq) + 12 H+ (aq) + 10 e-® I2 (s) + 6 H2O (l) / +1.195 *
Br2 (aq) + 2 e- ® 2 Br- (aq) / +1.0873 *
Br2 (l) + 2 e-® 2 Br- (aq) / +1.066 *
NO3- (aq) + 4 H+ (aq) + 3 e-® NO (g) + 2 H2O (l) / +0.957 *
2 Hg2+ (aq) + 2 e- ® Hg22+ (aq) / +0.920 *
Hg2+ (aq) + 2 e- ® Hg (l) / +0.8519
ClO- (aq) + H2O (l) + 2 e-® Cl- (aq) + 2 OH- (aq) / +0.81 *
Ag+ (aq) + e- ® Ag (s) / +0.7996 *
Hg22+ (aq) + 2 e- ® Hg (l) / +0.7973 *
Fe3+ (aq) + e- ® Fe2+ (aq) / +0.771 *
O2 (g) + 2 H+ (aq) + 2 e- ® H2O2 (aq) / +0.6945
ClO2- (aq) + H2O (l) + 2 e-® ClO- (aq) + 2 OH- (aq) / +0.66 *
MnO4- (aq) + 2 H2O (l) + 3 e-® MnO2 (s) + 4 OH- (aq) / +0.595 *
I2 + 2 e- ® 2 I- (aq) / +0.5355 *
Cu+ (aq) + e- ® Cu (s) / +0.521 *
IO-(aq) + H2O (l) + 2 e- ® I- (aq) + 2 OH- (aq) / +0.485 *
ClO4- (aq) + H2O (l) + 2 e-® ClO3-(aq) + 2 OH- (aq) / +0.36 *
Cu2+ (aq) + 2 e-® Cu (s) / +0.3419 *
ClO3- (aq) + H2O (l) + 2 e–® ClO2- (aq) + 2 OH- (aq) / +0.33 *
Bi3+ (aq) + 3 e- ® Bi (s) / +0.308 *
AgCl (s) + e- ® Ag (s) + Cl- (aq) / +0.22233 *
SO42- (aq) + 4 H+ (aq) + 2 e- ® SO2 (g) + 2 H2O (l) / +0.20
Cu2+ (aq) + e- ® Cu+ (aq) / +0.153 *
Sn4+ (aq) + 2 e- ® Sn2+ (aq) / +0.151 *
2 H+ (aq) + 2 e- ® H2 (g) / 0.00
Fe3+ (aq) + 3 e- ® Fe (s) / –0.037 *
Pb2+ (aq) + 2 e- ® Pb (s) / –0.1262 *
Sn2+ (aq) + 2 e-® Sn (s) / –0.1375 *
Ni2+ (aq) + 2 e-® Ni (s) / –0.257 *
Co2+ (aq) + 2e-® Co (s) / –0.277
Tl+ (aq) + e- ® Tl (s) / –0.3358
PbSO4 (s) + 2 e-® Pb (s) + SO42– (aq) / –0.3588 *
Cd2+ (aq) + 2 e- ® Cd (s) / –0.4030 *
Cr3+ (aq) + e-® Cr2+ (aq) / –0.407 *
Fe2+ (aq) + 2 e- ® Fe (s) / –0.447 *
Cr3+ (aq) + 3 e- ® Cr (s) / –0.744 *
Zn2+ (aq) + 2 e- ® Zn (s) / –0.7618 *
2 H2O (l) + 2 e-® H2 (g) + 2 OH– (aq) / –0.8277 *
Mn2+ (aq) + 2 e-® Mn (s) / –1.185 *
Ti2+ (aq) + 2 e-® Ti (s) / –1.630 *
Al3+ (aq) + 3 e-® Al (s) / –1.662 *
U3+ (aq) + 3 e-® U (s) / –1.798 *
Be2+ (aq) + 2 e- ® Be (s) / –1.847 *
Mg2+ (aq) + 2 e- ® Mg (s) / –2.372 *
Na+ (aq) + e- ® Na (s) / –2.7144
Ca2+ (aq) + 2 e-® Ca (s) / –2.869 *
Sr2+ (aq) + 2 e-® Sr (s) / –2.889 *
Ba2+ (aq) + 2 e-® Ba (s) / –2.912 *
K+ (aq) + e-® K (s) / –2.931*
Rb+ (aq) + e-® Rb (s) / –2.98 *
Cs+ (aq) + e-® Cs (s) / –3.026 *
Li+ (aq) + e- ® Li (s) / –3.0401*

* taken from David R. Lide, Editor-in-Chief, CRC Handbook of Chemistry and Physics 86th Edition (Boca Raton, FL: Taylor&Francis Group, 2005), pp. 8-20 to 8-24