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论文类型： 期刊论文

发表时间： 2011-02-01

发表刊物： ELECTROANALYSIS

收录刊物： SCIE

卷号： 23

期号： 2

页面范围： 355-363

ISSN号： 1040-0397

关键字： Anthraquinone; Doping; Electrochemistry; Oxygen reduction reaction; Polymers

摘要： To analyze the specific roles of anthraquinone-2-sulfonate (AQS) and polypyrrole (PPy) layer on oxygen reduction reaction (ORR), the electrocatalytic reduction of oxygen was investigated on the AQS/PPy composite modified graphite electrode. Results show that the enhanced electrocatalytic performance is attributed to the excellent electrocatalytic activity of the immobilized AQS functional groups to mediate two-electron reduction of O(2) to H(2)O(2). The PPy layer may not participate in ORR, but it can further catalyze the two-electron reduction of H(2)O(2) to produce H(2)O in the potential range more negative than that the two-electron reduction of oxygen proceeds efficiently on the AQS sites.