Ch ical chemistr ectrochemid四 The rate of charge transfer Rate of reduction of Ox vox=kclox/ Oxtne b red Rate of oxidation of red vRed =kalRed/ Cathodic current density jc=Fklox/ Anodic current density ja= F kalred ⊙ e e 质门大学化学化工学院 The net current density at the electrode jja- F kalRed -F klox/ (8)
11 Physical Chemistry The rate of charge transfer Rate of reduction of Ox Ox = kc [Ox] Rate of oxidation of Red Red = ka [Red] Cathodic current density jc = F kc [Ox] Anodic current density ja = F ka [Red] The net current density at the electrode j = ja -jc = F ka [Red] – F kc [Ox] (8) Ox + ne Re d − Electrochemistry 演示
choical Chemistry ectrochemid四 The activation Gibbs energy The net current density at the electrode j=jac=F kalRed -FkclOx (8) Activated complex theory Anodic current A G k=Be rt (9) Net current 4*G the activation Gibbs energy B: a constant Cathodic current △2G AG j= FBalRe d]e RI-FBC[OxJe Rr (10) 12
12 Physical Chemistry The activation Gibbs energy Cathodic current Anodic current Net current Activated complex theory RT G c RT G a a c j FB d e FB Ox e − − = [Re ] − [ ] (10) The net current density at the electrode j = ja -jc = F ka [Red] – F kc [Ox] (8) G: the activation Gibbs energy B: a constant Electrochemistry RT G k Be − = (9)