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electrode reaction | electrodecantation (or electrophoresis convection) |

The electrode reaction rate constants are related to the partial currents by
where
and
are the rate constants for the oxidizing (anodic) and reducing (cathodic) reactions respectively,
is the charge number of the cell reaction,
is the Faraday constant
and
is the geometric area of the electrode,
the product
includes all the species
which take part in the partial reaction,
is the volume concentration of species
and
is the order of the reaction with respect to species
.
The conditional rate constant of an electrode reaction is the value of the electrode reaction rate constant at the conditional (formal) potential of the electrode reaction. When
the transfer coefficient is independent of potential,
where
and
are the anodic and cathodic transfer coefficients respectively,
is the electric potential difference,
is the conditional (formal) potential,
is the stoichiometric number,
is the gas constant
and
is the thermodynamic temperature.
Similar rate constants can be defined using activities in place of concen
trations in the first two equations, and the standard electrode potential in place of the conditional potential in the latter two equations. This type of rate constant is called the standard rate constant of the electrode reaction. The observable electrode rate constant is the constant of proportionality expressing the dependence of the rate of the electrode reaction on the interfacial concentration of the chemical species involved in the reaction.

Source:

PAC, 1974, *37*, 499*
(Electrochemical nomenclature)
* on page 515

PAC, 1980, *52*, 233*
(Electrode reaction orders, transfer coefficients and rate constants. Amplification of definitions and recommendations for publication of parameters)
* on page 236

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Cite as:

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. doi:10.1351/goldbook.

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. doi:10.1351/goldbook.

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

DOI of this term: doi:10.1351/goldbook.E01961.

Original PDF version: http://www.iupac.org/goldbook/E01961.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.