Impedance of porous gold electrodes in the presence of electroactive species

被引：37

作者：

Jurczakowski, R ^{[1
]}

Hitz, C ^{[1
]}

Lasia, A ^{[1
]}

机构：

[1] Univ Sherbrooke, Dept Chim, Sherbrooke, PQ J1K 2R1, Canada

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2005年 / 582卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

impedance spectroscopy; porous gold electrodes; heterogeneous kinetics; rate constants; redox processes of hexaamineruthenium(III) and tris(1,10-phenanthroline)cobalt(II);

D O I：

10.1016/j.jelechem.2005.02.013

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Electrode processes of hexaamineruthenium(III) and tris(1,10-phenanthroline)cobalt(II) were studied on various porous gold electrodes in I M NaNO3 and H2SO4. The results were compared with those obtained on the polycrystalline gold electrodes. Impedance spectra were analyzed and charge transfer resistances determined. For the redox reactions in solutions in some cases two semicircles were observed on the complex plane plots. The experimental results were compared with the theory of electrochemical processes taking place on the porous electrodes developed earlier [A. Lasia, J. Electroanal. Chem., 428 (1997) 155, A. Lasia, J. Electroanal. Chem., 500 (2001) 30], which predicts formation of two semicircles on the complex plane plots for a simple one-electron redox system. Their nature and occurrence is discussed. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：85 / 96

页数：12

共 34 条

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