Standard electrode potential (data page)

  The values of standard electrode potentials are given in the table below in volts relative to the standard hydrogen electrode and are for the following conditions:

• A temperature of 298.15 K (25 °C);
• An effective concentration of 1 mol/L for each aqueous species or a species in a mercury amalgam;
• A partial pressure of 101.325 kPa (absolute) (1 atm, 1.01325 bar) for each gaseous reagent. This pressure is used because most literature data are still given for this value rather than for the current standard of 100 kPa.
• An activity of unity for each pure solid, pure liquid, or for water (solvent).
• Although many of the half cells are written for multiple electron transfers, the tabulated potentials are for a single electron transfer. All of the reactions should be divided by the stoichiometric coefficient for the electron to get the corresponding corrected reaction equation.
• Divide the potentials by 0.059 V to get pe° values, which are necessary for Nernst Equation and other thermodynamic calculations.

Legend: (s) – solid; (l) – liquid; (g) – gas; (aq) – aqueous (default for all charged species); (Hg) – amalgam.

Half-reaction			E° (V)
Oxidant	⇌	Reductant
Sr^+ +  e^−	⇌	Sr	−4.10
Ca^+ +  e^−	⇌	Ca	−3.8
Pr^3+ +  e^−	⇌	Pr^2+	−3.1
N3 N2(g) + 2 H^+ + 2 e^−	⇌	2HN3(aq)	−3.09
Li^+ +  e^−	⇌	Li(s)	−3.0401
N2(g) + 4 H2O + 2 e^−	⇌	2 NH2OH(aq) + 2 OH^−	−3.04
Cs^+ +  e^−	⇌	Cs(s)	−3.026
Ca(OH)2 + 2 e^−	⇌	Ca + 2 OH^−	−3.02
Er^3+ +  e^−	⇌	Er^2+	−3.0
Ba(OH)2 + 2 e^−	⇌	Ba + 2 OH^−	−2.99
Rb^+ +  e^−	⇌	Rb(s)	−2.98
K^+ +  e^−	⇌	K(s)	−2.931
Ba^2+ + 2 e^−	⇌	Ba(s)	−2.912
La(OH)3(s) + 3 e^−	⇌	La(s) + 3 OH^−	−2.90
Fr^+ +  e^−	⇌	Fr	−2.9
Sr^2+ + 2 e^−	⇌	Sr(s)	−2.899
Sr(OH)2 + 2 e^−	⇌	Sr + 2 OH^−	−2.88
Ca^2+ + 2 e^−	⇌	Ca(s)	−2.868
Eu^2+ + 2 e^−	⇌	Eu(s)	−2.812
Ra^2+ + 2 e^−	⇌	Ra(s)	−2.8
Ho^3+ +  e^−	⇌	Ho^2+	−2.8
Bk^3+ +  e^−	⇌	Bk^2+	−2.8
Yb^2+ + 2 e^−	⇌	Yb	−2.76
Na^+ +  e^−	⇌	Na(s)	−2.71
Mg^+ +  e^−	⇌	Mg	−2.70
Nd^3+ +  e^−	⇌	Nd^2+	−2.7
Mg(OH)2 + 2 e^−	⇌	Mg + 2 OH^−	−2.690
Sm^2+ + 2 e^−	⇌	Sm	−2.68
Be2O3^2− + 3 H2O + 4 e^−	⇌	2 Be + 6 OH^−	−2.63
Pm^3+ +  e^−	⇌	Pm^2+	−2.6
Dy^3+ +  e^−	⇌	Dy^2+	−2.6
No^2+ + 2 e^−	⇌	No	−2.50
HfO(OH)2 + H2O + 4 e^−	⇌	Hf + 4 OH^−	−2.50
Th(OH)4 + 4 e^−	⇌	Th + 4 OH^−	−2.48
Md^2+ + 2 e^−	⇌	Md	−2.40
Tm^2+ + 2 e^−	⇌	Tm	−2.4
La^3+ + 3 e^−	⇌	La(s)	−2.379
Y^3+ + 3 e^−	⇌	Y(s)	−2.372
Mg^2+ + 2 e^−	⇌	Mg(s)	−2.372
ZrO(OH)2(s) +  H2O + 4 e^−	⇌	Zr(s) + 4 OH^−	−2.36
Pr^3+ + 3 e^−	⇌	Pr	−2.353
Ce^3+ + 3 e^−	⇌	Ce	−2.336
Er^3+ + 3 e^−	⇌	Er	−2.331
Ho^3+ + 3 e^−	⇌	Ho	−2.33
H2AlO3^− + H2O + 3 e^−	⇌	Al + 4 OH^−	−2.33
Nd^3+ + 3 e^−	⇌	Nd	−2.323
Tm^3+ + 3 e^−	⇌	Tm	−2.319
Al(OH)3(s) + 3 e^−	⇌	Al(s) + 3 OH^−	−2.31
Sm^3+ + 3 e^−	⇌	Sm	−2.304
Fm^2+ + 2 e^−	⇌	Fm	−2.30
Am^3+ +  e^−	⇌	Am^2+	−2.3
Dy^3+ + 3 e^−	⇌	Dy	−2.295
Lu^3+ + 3 e^−	⇌	Lu	−2.28
Tb^3+ + 3 e^−	⇌	Tb	−2.28
Gd^3+ + 3 e^−	⇌	Gd	−2.279
H2 + 2 e^−	⇌	2 H^−	−2.23
Es^2+ + 2 e^−	⇌	Es	−2.23
Pm^2+ + 2 e^−	⇌	Pm	−2.2
Tm^3+ +  e^−	⇌	Tm^2+	−2.2
Dy^2+ + 2 e^−	⇌	Dy	−2.2
Ac^3+ + 3 e^−	⇌	Ac	−2.20
Yb^3+ + 3 e^−	⇌	Yb	−2.19
Cf^2+ + 2 e^−	⇌	Cf	−2.12
Nd^2+ + 2 e^−	⇌	Nd	−2.1
Ho^2+ + 2 e^−	⇌	Ho	−2.1
Sc^3+ + 3 e^−	⇌	Sc(s)	−2.077
AlF6^3− + 3 e^−	⇌	Al + 6 F^−	−2.069
Am^3+ + 3 e^−	⇌	Am	−2.048
Cm^3+ + 3 e^−	⇌	Cm	−2.04
Pu^3+ + 3 e^−	⇌	Pu	−2.031
Pr^2+ + 2 e^−	⇌	Pr	−2.0
Er^2+ + 2 e^−	⇌	Er	−2.0
Eu^3+ + 3 e^−	⇌	Eu	−1.991
Lr^3+ + 3 e^−	⇌	Lr	−1.96
Cf^3+ + 3 e^−	⇌	Cf	−1.94
Es^3+ + 3 e^−	⇌	Es	−1.91
Pa^4+ +  e^−	⇌	Pa^3+	−1.9
Am^2+ + 2 e^−	⇌	Am	−1.9
Th^4+ + 4 e^−	⇌	Th	−1.899
Fm^3+ + 3 e^−	⇌	Fm	−1.89
Np^3+ + 3 e^−	⇌	Np	−1.856
Be^2+ + 2 e^−	⇌	Be	−1.847
H2PO2^− +  e^−	⇌	P + 2 OH^−	−1.82
U^3+ + 3 e^−	⇌	U	−1.798
Sr^2+ + 2 e^−	⇌	Sr/Hg	−1.793
H2BO3^− + H2O + 3 e^−	⇌	B + 4 OH^−	−1.79
ThO2 + 4H^+ + 4 e^−	⇌	Th + 2 H2O	−1.789
HfO^2+ + 2 H^+ + 4 e^−	⇌	Hf + H2O	−1.724
HPO3^2− + 2 H2O + 3 e^−	⇌	P + 5 OH^−	−1.71
SiO3^2− + H2O + 4 e^−	⇌	Si + 6 OH^−	−1.697
Al^3+ + 3 e^−	⇌	Al(s)	−1.662
Ti^2+ + 2 e^−	⇌	Ti(s)	−1.63
ZrO2(s) + 4 H^+ + 4 e^−	⇌	Zr(s) + 2 H2O	−1.553
Zr^4+ + 4 e^−	⇌	Zr(s)	−1.45
Ti^3+ + 3 e^−	⇌	Ti(s)	−1.37
TiO(s) + 2 H^+ + 2 e^−	⇌	Ti(s) +  H2O	−1.31
Ti2O3(s) + 2 H^+ + 2 e^−	⇌	2 TiO(s) +  H2O	−1.23
Zn(OH)4^2− + 2 e^−	⇌	Zn(s) + 4 OH^−	−1.199
Mn^2+ + 2 e^−	⇌	Mn(s)	−1.185
Fe(CN)6^4− + 6 H^+ + 2  e^−	⇌	Fe(s) + 6HCN(aq)	−1.16
Te(s) + 2 e^−	⇌	Te^2−	−1.143
V^2+ + 2 e^−	⇌	V(s)	−1.13
Nb^3+ + 3 e^−	⇌	Nb(s)	−1.099
Sn(s) + 4 H^+ + 4 e^−	⇌	SnH4(g)	−1.07
SiO2(s) + 4 H^+ + 4 e^−	⇌	Si(s) + 2 H2O	−0.91
B(OH)3(aq) + 3 H^+ + 3 e^−	⇌	B(s) + 3 H2O	−0.89
Fe(OH)2(s) + 2 e^−	⇌	Fe(s) + 2 OH^−	−0.89
Fe2O3(s) + 3 H2O + 2 e^−	⇌	2Fe(OH)2(s) + 2 OH^−	−0.86
TiO^2+ + 2 H^+ + 4 e^−	⇌	Ti(s) +  H2O	−0.86
H2H2O + 2 e^−	⇌	H2(g) + 2 OH^−	−0.8277
Bi(s) + 3 H^+ + 3 e^−	⇌	BiH3	−0.8
Zn^2+ + 2 e^−	⇌	Zn(Hg)	−0.7628
Zn^2+ + 2 e^−	⇌	Zn(s)	−0.7618
Ta2O5(s) + 10 H^+ + 10 e^−	⇌	2 Ta(s) + 5 H2O	−0.75
Cr^3+ + 3 e^−	⇌	Cr(s)	−0.74
Ag2S(s) + 2 e^−	⇌	2Ag(s) + S^2-(aq)	−0.69
Au[Au(CN)2]^− +  e^−	⇌	Au(s) + 2 CN^−	−0.60
Ta^3+ + 3 e^−	⇌	Ta(s)	−0.6
PbO(s) +  H2O + 2 e^−	⇌	Pb(s) + 2 OH^−	−0.58
Ti2 TiO2(s) + 2 H^+ + 2 e^−	⇌	Ti2O3(s) +  H2O	−0.56
Ga^3+ + 3 e^−	⇌	Ga(s)	−0.53
U^4+ +  e^−	⇌	U^3+	−0.52
P H3PO2(aq) +  H^+ +  e^−	⇌	P(white)[note 1] + 2 H2O	−0.508
P H3PO3(aq) + 2 H^+ + 2 e^−	⇌	H3PO2(aq) +  H2O	−0.499
P H3PO3(aq) + 3 H^+ + 3 e^−	⇌	P(red)[note 1] + 3 H2O	−0.454
Fe^2+ + 2 e^−	⇌	Fe(s)	−0.44
C2 CO2(g) + 2 H^+ + 2 e^−	⇌	HOOCCOOH(aq)	−0.43
Cr^3+ +  e^−	⇌	Cr^2+	−0.42
Cd^2+ + 2 e^−	⇌	Cd(s)	−0.40
GeO2(s) + 2 H^+ + 2 e^−	⇌	GeO(s) +  H2O	−0.37
Cu2O(s) +  H2O + 2 e^−	⇌	2 Cu(s) + 2 OH^−	−0.360
PbSO4(s) + 2 e^−	⇌	Pb(s) + SO4^2−	−0.3588
PbSO4(s) + 2 e^−	⇌	Pb(Hg) + SO4^2−	−0.3505
Eu^3+ +  e^−	⇌	Eu^2+	−0.35
In^3+ + 3 e^−	⇌	In(s)	−0.34
Tl^+ +  e^−	⇌	Tl(s)	−0.34
Ge(s) + 4 H^+ + 4 e^−	⇌	GeH4(g)	−0.29
Co^2+ + 2 e^−	⇌	Co(s)	−0.28
P H3PO4(aq) + 2 H^+ + 2 e^−	⇌	H3PO3(aq) +  H2O	−0.276
V^3+ +  e^−	⇌	V^2+	−0.26
Ni^2+ + 2 e^−	⇌	Ni(s)	−0.25
As(s) + 3 H^+ + 3 e^−	⇌	AsH3(g)	−0.23
AgI(s) +  e^−	⇌	Ag(s) + I^−	−0.15224
MoO2(s) + 4 H^+ + 4 e^−	⇌	Mo(s) + 2 H2O	−0.15
Si(s) + 4 H^+ + 4 e^−	⇌	SiH4(g)	−0.14
Sn^2+ + 2 e^−	⇌	Sn(s)	−0.13
O2(g) +  H^+ +  e^−	⇌	HO2•(aq)	−0.13
Pb^2+ + 2 e^−	⇌	Pb(s)	−0.126
WO2(s) + 4 H^+ + 4 e^−	⇌	W(s) + 2 H2O	−0.12
P(red) + 3 H^+ + 3 e^−	⇌	PH3(g)	−0.111
C CO2(g) + 2 H^+ + 2 e^−	⇌	HCOOH(aq)	−0.11
Se(s) + 2 H^+ + 2 e^−	⇌	H2Se(g)	−0.11
C CO2(g) + 2 H^+ + 2 e^−	⇌	CO(g) +  H2O	−0.11
SnO(s) + 2 H^+ + 2 e^−	⇌	Sn(s) +  H2O	−0.10
SnO2(s) + 4 H^+ + 4 e^−	⇌	SnO(s) + 2 H2O	−0.09
WO3(aq) + 6 H^+ + 6 e^−	⇌	W(s) + 3 H2O	−0.09
P(white) + 3 H^+ + 3 e^−	⇌	PH3(g)	−0.063
Fe^3+ + 3 e^−	⇌	Fe(s)	−0.04
C HCOOH(aq) + 2 H^+ + 2 e^−	⇌	HCHO(aq) +  H2O	−0.03
H 2 H^+ + 2 e^−	⇌	H2(g)	0.0000
AgBr(s) +  e^−	⇌	Ag(s) + Br^−	+0.07133
S4O6^2− + 2 e^−	⇌	2 S2O3^2−	+0.08
Fe3O4(s) + 8 H^+ + 8 e^−	⇌	3 Fe(s) + 4 H2O	+0.085
N2(g) + 2 H2O + 6 H^+ + 6 e^−	⇌	2 NH4OH(aq)	+0.092
HgO(s) +  H2O + 2 e^−	⇌	Hg(l) + 2 OH^−	+0.0977
Cu(NH3)4^2+ +  e^−	⇌	Cu(NH3)2^+ + 2 NH3	+0.10
Ru(NH3)6^3+ +  e^−	⇌	Ru(NH3)6^2+	+0.10
N2H4(aq) + 4 H2O + 2 e^−	⇌	2 NH4^+ + 4 OH^−	+0.11
Mo H2MoO4(aq) + 6 H^+ + 6 e^−	⇌	Mo(s) + 4 H2O	+0.11
Ge^4+ + 4 e^−	⇌	Ge(s)	+0.12
C(s) + 4 H^+ + 4 e^−	⇌	CH4(g)	+0.13
C HCHO(aq) + 2 H^+ + 2 e^−	⇌	CH3OH(aq)	+0.13
S(s) + 2 H^+ + 2 e^−	⇌	H2S(g)	+0.14
Sn^4+ + 2 e^−	⇌	Sn^2+	+0.15
Cu^2+ +  e^−	⇌	Cu^+	+0.159
S HSO4^− + 3 H^+ + 2 e^−	⇌	SO2(aq) + 2 H2O	+0.16
UO2^2+ +  e^−	⇌	UO2^+	+0.163
S SO4^2− + 4 H^+ + 2 e^−	⇌	SO2(aq) + 2 H2O	+0.17
TiO^2+ + 2 H^+ +  e^−	⇌	Ti^3+ +  H2O	+0.19
SbO^+ + 2 H^+ + 3 e^−	⇌	Sb(s) +  H2O	+0.20
AgCl(s) +  e^−	⇌	Ag(s) + Cl^−	+0.22233
As H3AsO3(aq) + 3 H^+ + 3 e^−	⇌	As(s) + 3 H2O	+0.24
GeO(s) + 2 H^+ + 2 e^−	⇌	Ge(s) +  H2O	+0.26
UO2^+ + 4 H^+ +  e^−	⇌	U^4+ + 2 H2O	+0.273
Re^3+ + 3 e^−	⇌	Re(s)	+0.300
Bi^3+ + 3 e^−	⇌	Bi(s)	+0.308
VO^2+ + 2 H^+ +  e^−	⇌	V^3+ +  H2O	+0.34
Cu^2+ + 2 e^−	⇌	Cu(s)	+0.337
Fe [Fe(CN)6]^3− +  e^−	⇌	[Fe(CN)6]^4−	+0.36
Fc^+ +  e^−	⇌	Fc(s)	+0.4
O2(g) + 2 H2O + 4 e^−	⇌	4 OH^−(aq)	+0.401
Mo H2MoO4 + 6 H^+ + 3 e^−	⇌	Mo^3+ + 2 H2O	+0.43
C CH3OH(aq) + 2 H^+ + 2 e^−	⇌	CH4(g) +  H2O	+0.50
S SO2(aq) + 4 H^+ + 4 e^−	⇌	S(s) + 2 H2O	+0.50
Cu^+ +  e^−	⇌	Cu(s)	+0.520
C CO(g) + 2 H^+ + 2 e^−	⇌	C(s) +  H2O	+0.52
I3^− + 2 e^−	⇌	3 I^−	+0.53
I2(s) + 2 e^−	⇌	2 I^−	+0.54
Au [AuI4]^− + 3 e^−	⇌	Au(s) + 4 I^−	+0.56
As H3AsO4(aq) + 2 H^+ + 2 e^−	⇌	H3AsO3(aq) +  H2O	+0.56
Au [AuI2]^− +  e^−	⇌	Au(s) + 2 I^−	+0.58
MnO4^− + 2 H2O + 3 e^−	⇌	MnO2(s) + 4 OH^−	+0.59
S2O3^2 − + 6 H^+ + 4 e^−	⇌	2 S(s) + 3 H2O	+0.60
Mo H2MoO4(aq) + 2 H^+ + 2 e^−	⇌	MoO2(s) + 2 H2O	+0.65
C + 2 H^+ + 2 e^−	⇌		+0.6992
O2(g) + 2 H^+ + 2 e^−	⇌	H2O2(aq)	+0.70
Tl^3+ + 3 e^−	⇌	Tl(s)	+0.72
PtCl6^2− + 2 e^−	⇌	PtCl4^2− + 2 Cl^−	+0.726
Se H2SeO3(aq) + 4 H^+ + 4 e^−	⇌	Se(s) + 3 H2O	+0.74
PtCl4^2− + 2 e^−	⇌	Pt(s) + 4 Cl^−	+0.758
Fe^3+ +  e^−	⇌	Fe^2+	+0.77
Ag^+ +  e^−	⇌	Ag(s)	+0.7996
Hg2^2+ + 2 e^−	⇌	2 Hg(l)	+0.80
N NO3^−(aq) + 2 H^+ +  e^−	⇌	NO2(g) +  H2O	+0.80
Fe 2FeO4^2− + 5 H2O + 6 e^−	⇌	Fe2O3(s) + 10  OH^−	+0.81
Au [AuBr4]^− + 3 e^−	⇌	Au(s) + 4 Br^−	+0.85
Hg^2+ + 2 e^−	⇌	Hg(l)	+0.85
Ir [IrCl6]^2− +  e^−	⇌	[IrCl6]^3−	+0.87
MnO4^− +  H^+ +  e^−	⇌	HMnO4^−	+0.90
Hg2 Hg^2+ + 2 e^−	⇌	Hg2^2+	+0.91
Pd^2+ + 2 e^−	⇌	Pd(s)	+0.915
Au [AuCl4]^− + 3 e^−	⇌	Au(s) + 4 Cl^−	+0.93
MnO2(s) + 4 H^+ +  e^−	⇌	Mn^3+ + 2 H2O	+0.95
NO3^−(aq) + 4 H^+ + 3 e^−	⇌	NO(g) + 2 H2O(l)	+0.958
Au[AuBr2]^− +  e^−	⇌	Au(s) + 2 Br^−	+0.96
Xe[HXeO6]^3− + 2 H2O + 2 e^− +	⇌	[HXeO4]^− + 4  OH^−	+0.99
[VO2]^+(aq) + 2 H^+ +  e^−	⇌	[VO]^2+(aq) +  H2O	+1.0
TeH6TeO6(aq) + 2 H^+ + 2 e^−	⇌	TeO2(s) + 4 H2O	+1.02
Br2(l) + 2 e^−	⇌	2 Br^−	+1.066
Br2(aq) + 2 e^−	⇌	2 Br^−	+1.0873
I IO3^− + 5 H^+ + 4 e^−	⇌	HIO(aq) + 2 H2O	+1.13
Au [AuCl2]^− +  e^−	⇌	Au(s) + 2 Cl^−	+1.15
Se HSeO4^− + 3 H^+ + 2 e^−	⇌	H2SeO3(aq) +  H2O	+1.15
Ag2O(s) + 2 H^+ + 2 e^−	⇌	2 Ag(s) +  H2O	+1.17
ClO3^− + 2 H^+ +  e^−	⇌	ClO2(g) +  H2O	+1.18
Xe[HXeO6]^3− + 5 H2O + 8  e^−	⇌	Xe(g) + 11 OH^−	+1.18
Pt^2+ + 2 e^−	⇌	Pt(s)	+1.188
ClO2(g) +  H^+ +  e^−	⇌	HClO2(aq)	+1.19
I 2 IO3^− + 12 H^+ + 10 e^−	⇌	I2(s) + 6 H2O	+1.20
ClO4^− + 2 H^+ + 2 e^−	⇌	ClO3^− +  H2O	+1.20
O2(g) + 4 H^+ + 4 e^−	⇌	2 H2O	+1.229
MnO2(s) + 4 H^+ + 2 e^−	⇌	Mn^2+ + 2 H2O	+1.23
Xe[HXeO4]^− + 3 H2O + 6  e^−	⇌	Xe(g) + 7 OH^−	+1.24
Tl^3+ + 2 e^−	⇌	Tl^+	+1.25
Cr2O7^2− + 14 H^+ + 6 e^−	⇌	2 Cr^3+ + 7 H2O	+1.33
Cl2(g) + 2 e^−	⇌	2 Cl^−	+1.36
CoO2(s) + 4 H^+ +  e^−	⇌	Co^3+ + 2 H2O	+1.42
N 2 NH3OH^+ +  H^+ + 2 e^−	⇌	N2H5^+ + 2 H2O	+1.42
I 2 HIO(aq) + 2 H^+ + 2 e^−	⇌	I2(s) + 2 H2O	+1.44
BrO3^− + 5 H^+ + 4 e^−	⇌	HBrO(aq) + 2 H2O	+1.45
PbO ß-PbO2(s) + 4 H^+ + 2 e^−	⇌	Pb^2+ + 2 H2O	+1.460
PbO a-PbO2(s) + 4 H^+ + 2 e^−	⇌	Pb^2+ + 2 H2O	+1.468
Br 2 BrO3^− + 12 H^+ + 10 e^−	⇌	Br2(l) + 6 H2O	+1.48
Cl 2ClO3^− + 12 H^+ + 10 e^−	⇌	Cl2(g) + 6 H2O	+1.49
Cl HClO(aq) +  H^+ + 2 e^−	⇌	Cl^−(aq) +  H2O	+1.49
MnO4^− + 8 H^+ + 5 e^−	⇌	Mn^2+ + 4 H2O	+1.51
O HO2^• +  H^+ +  e^−	⇌	H2O2(aq)	+1.51
Au^3+ + 3 e^−	⇌	Au(s)	+1.52
NiO2(s) + 4 H^+ + 2 e^−	⇌	Ni^2+ + 2 OH^−	+1.59
Ce^4+ +  e^−	⇌	Ce^3+	+1.61
Cl 2 HClO(aq) + 2 H^+ + 2 e^−	⇌	Cl2(g) + 2 H2O	+1.63
Ag2O3(s) + 6 H^+ + 4 e^−	⇌	2 Ag^+ + 3 H2O	+1.67
Cl HClO2(aq) + 2 H^+ + 2 e^−	⇌	HClO(aq) +  H2O	+1.67
Pb^4+ + 2 e^−	⇌	Pb^2+	+1.69
MnO4^− + 4 H^+ + 3 e^−	⇌	MnO2(s) + 2 H2O	+1.70
AgO(s) + 2 H^+ +  e^−	⇌	Ag^+ +  H2O	+1.77
O H2O2(aq) + 2 H^+ + 2 e^−	⇌	2 H2O	+1.78
Co^3+ +  e^−	⇌	Co^2+	+1.82
Au^+ +  e^−	⇌	Au(s)	+1.83
BrO4^− + 2 H^+ + 2 e^−	⇌	BrO3^− +  H2O	+1.85
Ag^2+ +  e^−	⇌	Ag^+	+1.98
S2O8^2− + 2 e^−	⇌	2 SO4^2−	+2.010
O3(g) + 2 H^+ + 2 e^−	⇌	O2(g) +  H2O	+2.075
Mn HMnO4^− + 3 H^+ + 2 e^−	⇌	MnO2(s) + 2 H2O	+2.09
XeO3(aq) + 6 H^+ + 6  e^−	⇌	Xe(g) + 3 H2O	+2.12
XeH4XeO6(aq) + 8 H^+ + 8  e^−	⇌	Xe(g) + 6  H2O	+2.18
FeO4^2− + 3 e^− + 8 H^+	⇌	Fe^3+ + 4 H2O	+2.20
XeF2(aq) + 2 H^+ + 2 e^−	⇌	Xe(g) + 2HF(aq)	+2.32
XeH4XeO6(aq) + 2 H^+ + 2 e^−	⇌	XeO3(aq) + 3 H2O	+2.42
F2(g) + 2 e^−	⇌	2 F^−	+2.87
F2(g) + 2 H^+ + 2 e^−	⇌	2 HF(aq)	+3.05
KrF2(aq) + 2 e^−	⇌	Kr(g) + 2 F^−(aq)	+3.27

1. 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 PH₃.

References

• http://www.jesuitnola.org/upload/clark/Refs/red_pot.htm
• http://www.fptl.ru/biblioteka/spravo4niki/handbook-of-Chemistry-and-Physics.pdf
• http://hyperphysics.phy-astr.gsu.edu/Hbase/tables/electpot.html#c1

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6. David R. Lide, ed., CRC Handbook of Chemistry and Physics, Internet Version 2005, <http://www.hbcpnetbase.com>, CRC Press, Boca Raton, FL, 2005.
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8. Gordon Aylward & Tristan Findlay (2008). "SI Chemical Data", 6th edition (John Wiley & Sons, Australia), ISBN 978-0-470-81638-7.
9. WebElements Periodic Table of the Elements | Iron | compounds information
10. Bard, A. J., Parsons, R., and Jordan, J. (1985). Standard Potentials in Aqueous Solutions (Marcel Dekker, New York).
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12. Marcel Pourbaix (1966). Atlas of Electrochemical Equilibria in Aqueous Solutions (NACE International, Houston, Texas; Cebelcor, Brussels).
13. Connelly, Neil G.; Geiger, William E. (1 January 1996). "Chemical Redox Agents for Organometallic Chemistry". Chemical Reviews 96 (2): 877–910. doi:10.1021/cr940053x. PMID 11848774.
14. WebElements Periodic Table of the Elements | Xenon | compounds information
15. Cotton, F. Albert; Wilkinson, Geoffrey; Murillo, Carlos A.; Bochmann, Manfred (1999), Advanced Inorganic Chemistry (6th ed.), New York: Wiley-Interscience, ISBN 0-471-19957-5
16. Redox Reactions, Western Oregon University website
17. http://acta.chem-soc.si/60/60-3-455.pdf

See also

• Galvanic series
• biochemically relevant redox potentials
• Standard electrode potential