Analysis of the Volmer-Krishtalik mechanism for the chlorine electrode reaction

JOSÉ L. FERNÁNDEZ; MARÍA R. GENNERO DE CHIALVO; ABEL C. CHIALVO

ELECTROCHEMISTRY COMMUNICATIONS

Elsevier

Año: 2000 vol. 2 p. 630 - 635

1388-2481

The dependencies of the current density and surface coverage of the adsorbed intermediates on overpotential were established without kinetic approximations for the chlorine electrode reaction under the Volmer–Krishtalic mechanism. Tafelian regions were obtained which slope values cannot be derived from the use of the rate determining step criteria, such as 2.3026 2RTr3F and 2.3026 RTrF , as well as two or three Tafel regions with different slopes in the same anodic or cathodic curve. The existence of limiting kinetic current densities was also demonstrated. Finally, the results obtained were analysed and discussed, comparing them with those obtained by the usual methods.