张国权

个人信息Personal Information

副教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:环境学院

学科:环境科学. 环境工程

办公地点:环境楼B509

联系方式:13889406768

电子邮箱:zhguoquan@dlut.edu.cn

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蒽醌/聚吡咯复合膜修饰电极的电化学行为和电催化活性

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发表时间:2007-01-01

发表刊物:催化学报

所属单位:环境学院

卷号:28

期号:6

页面范围:504-508

ISSN号:0253-9837

摘要:Conductive and functional polypyrrole (PPy) film was prepared by incorporation of anthraquinone-sulphonate (AQS) as dopant during the electropolymerization of pyrrole on a glassy carbon electrode in aqueous solution. The electrochemical behavior of AQS in PPy matrix in various pH buffer solutions and electrocatalytic reduction of oxygen on the resulting polymer film at the optimized pH of 5.5 were studied by using cyclic voltammetry (CV) and rotating disk electrode (RDE) technique. The results showed that PPy not only lowed the AQS reaction potential and the peak potential separation but also increased the redox peak currents. The value of ionization constant for H(2)AQ/HAQ(-) is 9.5. The CV and RDE studies showed the involvement of two electrons in oxygen reduction and H(2)AQ is responsible for the enhanced catalytic activity. The catalytic reaction is in agreement with an electrochemical-chemical mechanism. The AQS/PPy composite film-modified electrode was found to exhibit reproducible results.

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