EIS at carbon fiber cylindrical microelectrodes

Leatham Landon-Lane; Aaron T. Marshall; David A. Harrington

Electrochemistry Communications (Dec 2019)

EIS at carbon fiber cylindrical microelectrodes

Leatham Landon-Lane,
Aaron T. Marshall,
David A. Harrington

Affiliations

Leatham Landon-Lane: Department of Chemical and Process Engineering, University of Canterbury, Christchurch 8140, New Zealand
Aaron T. Marshall: Department of Chemical and Process Engineering, University of Canterbury, Christchurch 8140, New Zealand; Corresponding authors.
David A. Harrington: Department of Chemistry, University of Victoria, Victoria, BC, V8W 2Y2, Canada; Corresponding authors.

Journal volume & issue: Vol. 109

Abstract

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The theoretical mass-transport impedance at cylindrical microelectrodes has been known for some time, but an experimental verification is given here for the first time, using carbon fiber electrodes taken from a commercial carbon felt. Nonlinear least-squares fitting of the impedance spectrum of a redox couple at the reversible potential enables accurate evaluation of a composite parameter containing the standard rate constant and mean diffusivity, without measuring the fiber diameter, length or area. Keywords: Mass transport impedance, Cylindrical diffusion, Carbon fiber, Microelectrode, EIS

Published in Electrochemistry Communications

ISSN: 1388-2481 (Print); 1873-1902 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Technology: Chemical technology: Industrial electrochemistry; Science: Chemistry
Website: https://www.journals.elsevier.com/electrochemistry-communications

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