Abstract
The behaviour of aqueous active bromine solutions prepared by the anodic oxidation of bromide at a Ti/RuO 2 anode has been investigated. Bromate is formed chemically through the oxidation of hypobromite by hypobromous acid and vice versa: ▪ The rate of the first reaction is at least 10 times higher than the second. The electrolytic formation of bromate occurs with the simultaneous evolution of oxygen. The following stoichiometry is suggested: ▪ This is analogous to the anodic chlorate formation. Because the oxidation potential for Br − is lower than for active bromine, the anodic formation of bromate takes place at current densities lower than the limiting value at Ti/RuO 2 anodes.
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