For a reaction with a single rate-determining step
where

is the cathodic transfer
coefficient (number),

is the
gas constant,

is
the
thermodynamic temperature, and

the
stoichiometric number giving the number of identical activated complexes formed and destroyed in the completion
of the overall reaction as formulated with the transfer of

electrons.
Source:
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.
https://doi.org/10.1351/goldbook.