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The behavior of RuO 2 and DSA anodes in hypochlorite oxidation is compared to outline limitations of the anode performance in the chlorate process. Both electrode materials oxidize hypochlorite via a radical involving mechanism, which produces overstoichiometric amounts of oxygen and hydrogen peroxide. Regardless of the electrode material the hypochlorite oxidation competes with chlorine evolution for the same surface sites. The hypochlorite oxidation prevails at low ionic strengths and indoi:10.1149/2.0241814jes fatcat:krfj5gs2ljc5jepiw4h4by6ooi