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energy of activation

This is defined by the equation:
U ‡ = − R T ( ∂ ( ln I 0 ) ∂ T −1 ) p , c j , ...
where I 0 is the exchange current. At any overpotentialη it is defined by the equation:
U ‡ η = − R ( ∂ ( ln ( | I | ) ) ∂ T −1 ) p , η , c j , ...
where I is the current passing from the electrode into the electrolyte.
Source:
PAC, 1974, 37, 499 (Electrochemical nomenclature) on page 516
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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.E02109.
Original PDF version: http://www.iupac.org/goldbook/E02109.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 The PDF version is out of date and is provided for reference purposes only.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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