Fabrication and electrochemical behavior investigation of a polypyrrole/4-hydroxy-6-methyl-2-mercaptopyrimidine comodified gold electrode

被引：9

作者：

Chen, M ^{[1
]}

Nie, MY ^{[1
]}

Li, HL ^{[1
]}

机构：

[1] Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1999年 / 209卷 / 02期

基金：

中国国家自然科学基金;

关键词：

self-assembled monolayers; polypyrrole; modified gold electrode; ascorbic acid; X-ray photoelectron spectroscopy (XPS);

D O I：

10.1006/jcis.1998.5913

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A polypyrrole (PPy)/4-hydroxy-6-methyl-2-mercaptopyrimidine (HMMP) comodified gold electrode was prepared and characterized in the form of PPy/HMMP/Au. The polymerization mechanisms of pyrrole on a bare Au electrode, a dodecanethiol-modified gold electrode, and a HMMP/Au electrode are compared and discussed. With ascorbic acid as a probe, various factors affecting the electrochemical characteristics of the PPy/MMP/Au electrode are investigated. The catalytic activity for the electrochemical oxidation of L-ascorbic acid was studied in 0.1 mol . L-1 NaCl and 1.0 x 10(-3) mol . L-1 HCl. Both the kinetics of oxidation and the reproducibility of the electrochemical response are enhanced at the comodified electrode compared to that of an unmodified metal electrode or the PPy/Au electrode in determination of ascorbic acid. (C) 1999 Academic Press.

引用

页码：421 / 427

页数：7

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