蒽醌聚吡咯复合膜修饰电极的电化学行为和电催化活性张国权.pdfVIP

28 6 　　　 2007 6 Vol.28 No.6 ChineseJournal of Catalysis June 2007 :0253-9837(2007)06-0504-05 :504～508 / 张国权, 　杨凤林 (大连理工大学环境与生命学院, 工业生态与环境工程教育部重点实验室, 辽宁大连116024) :(AQS)(PPy)/, H H=5.5 ., , PPy AQS , - , H AQ/HAQ 9.5.AQS/PPy H O 2 2 2 , H AQ , .. 2 :;;;;; :O643　　　:A Electrochemical Behavior and Electrocatalytic Activity of Glassy Carbon Electrode Modified by Anthraquinone/Polypyrrole Composite Film ZHANG Guoquan, YANG Fenglin ＊ (K ey Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Ed ucation, School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116 24, Liaoning, China) Abstract:Conductive and functional oly yrrole (PPy )film w as re ared by incor oration of anthraquinone- sul honate (AQS)as do ant during the electro olymerization of yrrole on a glassy carbon electrode in aqueous solution.The electrochemical behavior of AQS in PPy matrix in various H buffer solutions and electrocatalytic reduction of oxygen on the resulting olymer film at the o timized H of 5.5 w ere studied by using cyclic voltammetry (CV)and rotating disk electrode (RDE )technique.The results show ed that PPy not only low ed the AQS reaction otential and the eak otential se aration but also increased the redox eak currents.The val- - ue of ionization constant for H AQ/HAQ is 9.5.The CV and RDE studies show ed the involvement of tw o 2 electrons in oxygen reduction and H AQ is res onsible for the enhanced catalytic activity .The catalytic reaction