The impedance response of rotating disk electrodes

被引：5

作者：

Wu, Shao-Ling ^{[1
]}

Orazem, Mark E. ^{[1
]}

Tribollet, Bernard ^{[2
]}

Vivier, Vincent ^{[2
]}

机构：

[1] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA

[2] Univ Paris 06, LISE, UPR CNRS 15, F-75252 Paris 05, France

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2015年 / 737卷

关键词：

Coupled faradaic and charging currents; Frequency dispersion; CPE; PHASE-ELEMENT BEHAVIOR; FARADAIC IMPEDANCES; SPECTROSCOPY; SEPARATION; FLOW;

D O I：

10.1016/j.jelechem.2014.05.036

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Classifications and recent findings are reviewed for numerical simulations describing the impedance response of rotating disk electrodes. The disk geometry is shown to cause a complex character to the ohmic contribution to the impedance response. For reactions that do not involve formation of adsorbed intermediates, the frequency dispersion associated with the disk geometry occurs above a characteristic frequency. Such dispersion may be avoided by selecting a disk of sufficiently small dimension. For reactions that do involve formation of adsorbed intermediates, a low-frequency dispersion is also seen. Models including the influence of mass transfer show that the coupling of faradaic and charging currents induces frequency dispersion at frequencies associated with the faradaic reaction. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：11 / 22

页数：12

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