Mass-transport impedance at channel electrodes: accurate and approximate solutions
Date
2016
Authors
Holm, Thomas
Ingdal, Mats
Fanavoll, Espen V.
Sunde, Svein
Seland, Frode
Harrington, David A.
Journal Title
Journal ISSN
Volume Title
Publisher
Electrochimica Acta
Abstract
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.
Description
Keywords
FEM, Channel electrode, EIS, Lévêque approximation, Axial diffusion
Citation
Holm, T., Ingdal, M., Fanavoll, E.V. Sunde, S., Seland, F. & Harrington, D.A. (2016). Mass-transport impedance at channel electrodes: accurate and approximate solutions. Electrochimica Acta, 202, 84-89. https://doi.org/10.1016/j.electacta.2016.03.096