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标准氧化还原电位FromWikipedia,thefreeencyclopedia(RedirectedfromTableofstandardelectrodepotentials)Jumpto:navigation,searchMainarticle:standardelectrodepotentialThevaluesofstandardelectrodepotentialsaregiveninthetablebelowinvoltsrelativetothestandardhydrogenelectrodeandareforthefollowingconditions:Atemperatureof298.15K(25°C);Aneffectiveconcentrationof1mol/Lforeachaqueousspeciesoraspeciesinamercuryamalgam;Apartialpressureof101.325kPa(absolute)(1atm,1.01325bar)foreachgaseousreagent.Thispressureisusedbecausemostliteraturedataarestillgivenforthisvalueratherthanforthecurrentstandardof100kPa.Anactivityofunityforeachpuresolid,pureliquid,orforwater(solvent).Legend:(s)–solid;(l)–liquid;(g)–gas;(aq)–aqueous(defaultforallchargedspecies);(Hg)–amalgam.Half-reactionE°(V)[note1]Ref.3⁄2 N2(g)+ H++ e−HN3(aq)−3.09[1][2]Li++ e−Li(s)−3.0401[2]N2(g)+4 H2O+2 e−2 NH2OH(aq)+2 OH−−3.04[1]Cs++ e−Cs(s)−3.026[2]Rb++ e−Rb(s)−2.98[2]K++ e−K(s)−2.931[2]Half-reactionE°(V)[note1]Ref.Ba2++2 e−Ba(s)−2.912[2]La(OH)3(s)+3 e−La(s)+3 OH−−2.90[2]Sr2++2 e−Sr(s)−2.899[2]Ca2++2 e−Ca(s)−2.868[2]Eu2++2 e−Eu(s)−2.812[2]Ra2++2 e−Ra(s)−2.8[2]Na++ e−Na(s)−2.71[2][3]Sc3++3 e−Sc(s)−2.077[4]La3++3 e−La(s)−2.379[2]Y3++3 e−Y(s)−2.372[2]Mg2++2 e−Mg(s)−2.372[2]ZrO(OH)2(s)+ H2O+4 e−Zr(s)+4 OH−−2.36[2]Al(OH)4−+3 e−Al(s)+4 OH−−2.33Al(OH)3(s)+3 e−Al(s)+3 OH−−2.31H2(g)+2 e−2 H−−2.25Ac3++3 e−Ac(s)−2.20Be2++2 e−Be(s)−1.85U3++3 e−U(s)−1.66[5]Al3++3 e−Al(s)−1.66[3]Ti2++2 e−Ti(s)−1.63[3]Half-reactionE°(V)[note1]Ref.ZrO2(s)+4 H++4 e−Zr(s)+2 H2O−1.553[6]Zr4++4 e−Zr(s)−1.45[6]Ti3++3 e−Ti(s)−1.37[7]TiO(s)+2 H++2 e−Ti(s)+ H2O−1.31Ti2O3(s)+2 H++2 e−2 TiO(s)+ H2O−1.23Zn(OH)42−+2 e−Zn(s)+4 OH−−1.199[6]Mn2++2 e−Mn(s)−1.185[6]Fe(CN)64−+6 H++2 e−Fe(s)+6HCN(aq)−1.16[8]Te(s)+2 e−Te2−−1.143[9]V2++2 e−V(s)−1.13[9]Nb3++3 e−Nb(s)−1.099Sn(s)+4 H++4 e−SnH4(g)−1.07SiO2(s)+4 H++4 e−Si(s)+2 H2O−0.91B(OH)3(aq)+3 H++3 e−B(s)+3 H2O−0.89Fe(OH)2(s)+2 e−Fe(s)+2 OH−−0.89[8]Fe2O3(s)+3 H2O+2 e−2Fe(OH)2(s)+2 OH−−0.86[8]TiO2++2 H++4 e−Ti(s)+ H2O−0.862 H2O+2 e−H2(g)+2 OH−−0.8277[6]Bi(s)+3 H++3 e−BiH3−0.8[6]Zn2++2 e−Zn(Hg)−0.7628[6]Half-reactionE°(V)[note1]Ref.Zn2++2 e−Zn(s)−0.7618[6]Ta2O5(s)+10 H++10 e−2 Ta(s)+5 H2O−0.75Cr3++3 e−Cr(s)−0.74[Au(CN)2]−+ e−Au(s)+2 CN−−0.60Ta3++3 e−Ta(s)−0.6PbO(s)+ H2O+2 e−Pb(s)+2 OH−−0.582 TiO2(s)+2 H++2 e−Ti2O3(s)+ H2O−0.56Ga3++3 e−Ga(s)−0.53U4++ e−U3+−0.52[5]H3PO2(aq)+ H++ e−P(white)[note2]+2 H2O−0.508[6]H3PO3(aq)+2 H++2 e−H3PO2(aq)+ H2O−0.499[6]H3PO3(aq)+3 H++3 e−P(red)[note2]+3 H2O−0.454[6]Fe2++2 e−Fe(s)−0.44[3]2 CO2(g)+2 H++2 e−HOOCCOOH(aq)−0.43Cr3++ e−Cr2+−0.42Cd2++2 e−Cd(s)−0.40[3]GeO2(s)+2 H++2 e−GeO(s)+ H2O−0.37Cu2O(s)+ H2O+2 e−2 Cu(s)+2 OH−−0.360[6]PbSO4(s)+2 e−Pb(s)+SO42−−0.3588[6]PbSO4(s)+2 e−Pb(Hg)+SO42−−0.3505[6]Half-reactionE°(V)[note1]Ref.Eu3++ e−Eu2+−0.35[5]In3++3 e−In(s)−0.34[9]Tl++ e−Tl(s)−0.34[9]Ge(s)+4 H++4 e−GeH4(g)−0.29Co2++2 e−Co(s)−0.28[6]H3PO4(aq)+2 H++2 e−H3PO3(aq)+ H2O−0.276[6]V3++ e−V2+−0.26[3]Ni2++2 e−Ni(s)−0.25As(s)+3 H++3 e−AsH3(g)−0.23[9]AgI(s)+ e−Ag(s)+I−−0.15224[6]MoO2(s)+4 H++4 e−Mo(s)+2 H2O−0.15Si(s)+4 H++4 e−SiH4(g)−0.14Sn2++2 e−Sn(s)−0.13O2(g)+ H++ e−HO2•(aq)−0.13Pb2++2 e−Pb(s)−0.13[3]WO2(s)+4 H++4 e−W(s)+2 H2O−0.12P(red)+3 H++3 e−PH3(g)−0.111[6]CO2(g)+2 H++2 e−HCOOH(aq)−0.11Se(s)+2 H++2 e−H2Se(g)−0.11CO2(g)+2 H++2 e−CO(g)+ H2O−0.11Half-reactionE°(V)[note1]Ref.SnO(s)+2 H++2 e−Sn(s)+ H2O−0.10SnO2(s)+2 H++2 e−SnO(s)+ H2O−0.09WO3(aq)+6 H++6 e−W(s)+3 H2O−0.09[9]P(white)+3 H++3 e−PH3(g)−0.063[6]Fe3++3 e−Fe(s)−0.04[8]HCOOH(aq)+2 H++2 e−HCHO(aq)+ H2O−0.032 H++2 e−H2(g)0.0000≡0AgBr(s)+ e−Ag(s)+Br−+0.07133[6]S4O62−+2 e−2 S2O32−+0.08Fe3O4(s)+8 H++8 e−3 Fe(s)+4 H2O+0.085[10]N2(g)+2 H2O+6 H++6 e−2 NH4OH(aq)+0.092HgO(s)+ H2O+2 e−Hg(l)+2 OH−+0.0977Cu(NH3)42++ e−Cu(NH3)2++2 NH3+0.10[9]Ru(NH3)63++ e−Ru(NH3)62++0.10[5]N2H4(aq)+4 H2O+2 e−2 NH4++4 OH−+0.11[1]H2MoO4(aq)+6 H++6 e−Mo(s)+4 H2O+0.11Ge4++4 e−Ge(s)+0.12C(s)+4 H++4 e−CH4(g)+0.13[9]HCHO(aq)+2 H++2 e−CH3OH(aq)+0.13S(s)+2 H++2 e−H2S(g)+0.14Half-reactionE°(V)[note1]Ref.Sn4++2 e−Sn2++0.15Cu2++ e−Cu++0.159[9]HSO4−+3 H++2 e−SO2(aq)+2 H2O+0.16UO22++ e−UO2++0.163[5]SO42−+4 H++2 e−SO2(aq)+2 H2O+0.17TiO2++2 H++ e−Ti3++ H2O+0.19SbO++2 H++3 e−Sb(s)+ H2O+0.20AgCl(s)+ e−Ag(s)+Cl−+0.22233[6]H3AsO3(aq)+3 H++3 e−As(s)+3 H2O+0.24GeO(s)+2 H++2 e−Ge(s)+ H2O+0.26UO2++4 H++ e−U4++2 H2O+0.273[5]Re3++3 e−Re(s)+0.300Bi3++3 e−Bi(s)+0.308[6]VO2++2 H++ e−V3++ H2O+0.34Cu2++2 e−Cu(s)+0.340[9][Fe(CN)6]3−+ e−[Fe(CN)6]4−+0.36O2(g)+2 H2O+4 e−4 OH−(aq)+0.40[3]H2MoO4+6 H++3 e−Mo3++2 H2O+0.43CH3OH(aq)+2 H++2 e−CH4(g)+ H2O+0.50SO2(aq)+4 H++4 e−S(s)+2 H2O+0.50Half-reactionE°(V)[note1]Ref.Cu++ e−Cu(s)+0.520[9]CO(g)+2 H++2 e−C(s)+ H2O+0.52I3−+2 e−3 I−+0.53[3]I2(s)+2 e−2 I−+0.54[3][AuI4]−+3 e−Au(s)+4 I−+0.56H3AsO4(aq)+2 H++2 e−H3AsO3(aq)+ H2O+0.56[AuI2]−+ e−Au(s)+2 I−+0.58MnO4−+2 H2O+3 e−MnO2(s)+4 OH−+0.59S2O32 −+6 H++4 e−2 S(s)+3 H2O+0.60Fc++ e−Fc(s)+0.641[11]H2MoO4(aq)+2 H++2 e−MoO2(s)+2 H2O+0.65+2 H++2 e−+0.6992[6]O2(g)+2 H++2 e− H2O2(aq)+0.70Tl3++3 e−Tl(s)+0.72PtCl62−+2 e−PtCl42−+2 Cl−+0.726[5]H2SeO3(aq)+4 H++4 e−Se(s)+3 H2O+0.74PtCl42−+2