Determination of Reactive Intermediates During Anodic Oxygen-transfer Reactions at Lead Dioxide

Chemical Research in Chinese Universities ›› 2004, Vol. 20 ›› Issue (3): 289-293.

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Determination of Reactive Intermediates During Anodic Oxygen-transfer Reactions at Lead Dioxide

AI Shi-yun, ZHANG Wen, GAO Meng-nan, GU Fen-lin, WANG Qing-jiang, JIN Li-tong

Department of Chemistry, East China Normal University, Shanghai 200062, P. R. China

Received:2003-04-15 Online:2004-06-24 Published:2011-08-06
Supported by:
Supported by the Foundation of Key Technology Research and Development Program of China(No.2001BA210A04 and No.2002AA601330) and the Foundation of Shanghai Science and Technology Committee(No.021409012).

Abstract

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.

Key words: PbO₂ electrode, Electrocatalysis, Hydroxyl free radical, Salicylic acid, HPLC

AI Shi-yun, ZHANG Wen, GAO Meng-nan, GU Fen-lin, WANG Qing-jiang, JIN Li-tong. Determination of Reactive Intermediates During Anodic Oxygen-transfer Reactions at Lead Dioxide[J]. Chemical Research in Chinese Universities, 2004, 20(3): 289-293.

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Determination of Reactive Intermediates During Anodic Oxygen-transfer Reactions at Lead Dioxide

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