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If the charging current is negligible, in the case of a single electrode reaction, the electrode current density (Math - text) of the electric current flowing through the electrode is related to the flux density of a species B by the equation:
Math - e
where Math - text is the normal component of the vector Math - text at the electrode-solution interface, Math - text is the charge number of the electrode reaction and Math - text is the stoichiometric number of species B. The ratio Math - ei is to be taken as positive if the species B is consumed in a cathodic reaction or produced in an anodic reaction. Otherwise it is to be taken as negative. With the convention that the normal distance vector points into the electrolytic solution, a cathodic current is then negative, an anodic current positive.
Source:
PAC, 1981, 53, 1827 (Nomenclature for transport phenomena in electrolytic systems) on page 1835
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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.
DOI of this term: https://doi.org/10.1351/goldbook.E01952
Original PDF version (may be out of date): http://www.iupac.org/goldbook/E01952.pdf.
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