Holm, ThomasIngdal, MatsFanavoll, Espen V.Sunde, SveinSeland, FrodeHarrington, David A.2019-01-242019-01-2420162016Holm, 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.2016.03.096https://doi.org/10.1016/j.electacta.2016.03.096http://hdl.handle.net/1828/10554Accurate 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.enFEMChannel electrodeEISLévêque approximationAxial diffusionPostprintDepartment of Chemistry