Generation of chlorine at glassy carbon. Study of kinetic parameters and current efficiencies by rotating disc electrode voltammetry

Abstract

A glassy carbon electrode is used for the anodic generation of chlorine. The reaction mechanism determined allows the use of approximate current-potential relationships for calculating charge-transfer kinetic parameters. The values found are interpreted by the condition of the electrode surface and adsorbed chlorine. Generating current efficiencies were calculated using the determined kinetic parameters. A maximum of 99.99% was found for a current density of 58.4 mA cm^–2. Electrode surface attack was detected at potentials above 1.7 V versus S.C.E.