Electrochemical behavior of Ni particles modified polypyrrole films studied by EQCN technique

被引：6

作者：

Bergamaski, FOF

Santos, MC

Nascente, PAP

Bulhoes, LOS

Pereira, EC

机构：

[1] Univ Fed Sao Carlos, Dept Quim, Ctr Multidisciplinar Desenvolvimento Mat Ceram, Lab Interdisciplinar Eletroquim & Ceram, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP, Brazil

[3] UNICEP, Ctr Univ Cent Paulista, CENIP, BR-13563470 Sao Carlos, SP, Brazil

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2005年 / 583卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

polypyrrole; EQCN; XPS; polymers with immobilized functional groups; Ni particles;

D O I：

10.1016/j.jelechem.2005.06.012

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Polypyrrole films modified with Ni Particles were eletrodeposited using a constant potential on a Pt/quartz crystal electrode with the aim to investigate the changes in the voltammetric and mass profiles compared with pure polypyrrole. The electrochemical behavior of the polypyrrole with Ni showed a new cathodic peak at -0.73 V associated to Ni2+ reduction. Besides, it was characterized that there is a redox-pair of the polymer and Ni and a model was proposed to explain the phenomenon considering the eletroneutrality principle. The transport of the ClO4- ion into (or outside) the polymer is opposite to the expected direction. This occurs due to the redox-pair between the PPy chain and Ni species which can be explained by a loss of anions during Ni oxidation and the gain of anions during the Ni reduction. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：162 / 166

页数：5

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