Adsorbed bromide ion is shown to act catalytically on the electro‐oxidation of ethylenediaminetetraacetocobalt(II) ion at platinum electrodes although no bromide is incorporated in the cobalt(III) product of the electrode reaction. Adsorbed bromide is also shown to inhibit the oxidation of platinum electrodes especially in acid solutions.
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Fred C. Anson (1963) studied this question.