Determination of Reactive Intermediates During Anodic Oxygen-transfer Reactions at Lead Dioxide |
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Authors: | AI Shi-yun ZHANG Wen GAO Meng-nan GU Fen-lin WANG Qing-Jiang JIN Li-tong |
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Institution: | Department of Chemistry, East China Normal University, Shanghai 200062, P. R. China |
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Abstract: | The anodic discharge of water to produce adsorbed hydroxyl free radicals(*OH) is considered to be a prerequisite to anodic O-transfer reactions at a PbO2 electrode. In this work, a method was studied by means of high-performance liquid chromatography(HPLC) combined with electrochemical detection(ED) so as to investigate the production of hydroxyl free radicals(*OH) in the process of the anodic discharge of H2O at a PbO2 electrode. The voltammetric data obtained at the PbO2 electrode for the oxidation of salicylic acid to salicylate hydroxylation products(DHBAs) and the detection of DHBAs by means of HPLC-ED confirm the proposed mechanism. |
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Keywords: | PbO2 electrode Electrocatalysis Hydroxyl free radical Salicylic acid HPLC |
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