STUDY OF OVEROXIDIZED POLYPYRROLE USING X-RAY PHOTOELECTRON-SPECTROSCOPY

被引：122

作者：

GE, HL ^{[1
]}

QI, GJ ^{[1
]}

KANG, ET ^{[1
]}

NEOH, KG ^{[1
]}

机构：

[1] NATL UNIV SINGAPORE,DEPT CHEM ENGN,SINGAPORE 0511,SINGAPORE

来源：

POLYMER | 1994年 / 35卷 / 03期

关键词：

POLYPYRROLE; OVEROXIDATION; XPS;

D O I：

10.1016/0032-3861(94)90503-7

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Overoxidation of polypyrrole was carried out electrochemically and studied by X-ray photoelectron spectroscopy. It is shown that overoxidation starts on the polymer adjacent to the electrode and then advances to the polymer facing solution. During overoxidation, original positive charges on polypyrrole (-NH+-) are mostly replaced by -NH-, accompanied by the loss of counterions. Overoxidation progresses in two steps. Carbons are oxidized into C OH in the first step and into C=O in the second step. Changing the pH of the media and increasing the potential have no significant effects on the degree of overoxidation in the range studied.

引用

页码：504 / 508

页数：5

共 19 条

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