Mass-transport impedance at channel electrodes: accurate and approximate solutions

被引：14

作者：

Holm, Thomas ^{[1
,2
]}

Ingdal, Mats ^{[1
,2
]}

Fanavoll, Espen V. ^{[1
,2
]}

Sunde, Svein ^{[1
]}

Seland, Frode ^{[1
]}

Harrington, David A. ^{[2
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, NO-7491 Trondheim, Norway

[2] Univ Victoria, Dept Chem, Victoria, BC V8W 3V6, Canada

来源：

ELECTROCHIMICA ACTA | 2016年 / 202卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

FEM; Channel electrode; EIS; Leveque approximation; Axial diffusion; ROTATING-DISK ELECTRODE; WARBURG IMPEDANCE; MICROBAND ELECTRODES; TUBULAR ELECTRODES; CONVECTIVE FLOW; VOLTAMMETRY; SPECTROSCOPY; AMPLITUDE; BEHAVIOR; DEVICES;

D O I：

10.1016/j.electacta.2016.03.096

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Accurate numerical electrochemical impedance spectra at channel electrodes are obtained using commercial finite element method software. These agree with experimental measurements on the hexaammineruthenium(II/III) reversible redox couple. The numerical solutions are used as a benchmark to test the validity of some common analytical approximations for the mass -transport impedance. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：84 / 89

页数：6

共 27 条

[1] Microband electrodes of ideal and nonideal geometries: AC impedance spectroscopy [J].