heterogeneous diffusion rate constant

in electrochemistry

Defined by the equation:

$k d = I l n F c A$

where the limiting current $I l$ is assumed to be due to the diffusion species of concentration $c$ and of diffusion coefficient $D$ . $n$ is the charge number of the cell reaction written so that the stoichiometric coefficient of this species is unity. $A$ is usually taken as the geometric area of the electrode, and $F$ is the Faraday constant.

Source:

PAC, 1974, 37, 499 (Electrochemical nomenclature) on page 513

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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.H02805.

Original PDF version: http://www.iupac.org/goldbook/H02805.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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