Mass-transport impedance at channel electrodes: accurate and approximate solutions
By Thomas Holm and Mats Ingdal and Espen V. Fanavoll and Svein Sunde and Frode Seland and David A. Harrington
Published in Electrochimica Acta
2016
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.