Electrochemical overoxidation of conducting polypyrrole nitrate film in aqueous solutions

被引：177

作者：

Li, YF ^{[1
]}

Qian, RY ^{[1
]}

机构：

[1] Chinese Acad Sci, Lab Organ Solids, Ctr Mol Sci, Inst Chem, Beijing 100080, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2000年 / 45卷 / 11期

基金：

中国国家自然科学基金;

关键词：

conducting polypyrrole; cyclic voltammograms; overoxidation; in-situ absorption spectra; FTIR;

D O I：

10.1016/S0013-4686(99)00392-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical overoxidation of conducting polypyrrole nitrate film in aqueous solutions was studied by cyclic voltammetry, in-situ spectro-electrochemical measurement and FTIR spectroscopy. The overoxidation, which is entirely irreversible, results in the dedoping of conducting polypyrrole and the formation of carboxyl group. The potentials at which the overoxidation occurs depends on the pH values of the aqueous solutions. The higher the pH value, the lower the overoxidation potential will be, i.e. the easier the occurrence of the overoxidation, which is coincident with the electrolysis reaction of water to give out oxygen. It was supposed that the oxygen produced in the electrolysis of water results in the overoxidation of the conducting polypyrrole films. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1727 / 1731

页数：5

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