Abstract
The electrochemical processes of the aqueous Br 2/Br − system have been studied, by the method of the rotating disc electrode, on two different vitreous carbon electrodes: reticulated vitreous carbon RVC E.R.G. Inc., Lowell, Oakland, Calif.) and smooth vitreous carbon CVJ (Tacussel, Lyon France). On both electrodes the cathodic and the anodic processes involve two consecutive electrochemical steps: ▪ The step (1) is rate-controlling in the cathodic process and the step (2) in the anodic process. The Br − 3 reduction occurs via formation of Br 2, with which Br − 3 is in rapid equilibrium, whereupon Br 2 is reduced according to mechanisms (1) and (2).
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