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

Holm, Thomas; Ingdal, Mats; Fanavoll, Espen Vinge; Sunde, Svein; Seland, Frode; Harrington, David A.
Journal article, Peer reviewed
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URI
http://hdl.handle.net/11250/2432912
Date
2016
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  • Institutt for materialteknologi [1604]
  • Publikasjoner fra CRIStin - NTNU [20842]
Original version
Electrochimica Acta. 2016, 202 84-89.   10.1016/j.electacta.2016.03.096
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.
Publisher
Elsevier
Journal
Electrochimica Acta

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