energy of activation

of an electrode reaction
https://doi.org/10.1351/goldbook.E02109
This is defined by the equation: U=R T ((lnI0)T1)p,cj,... where I0 is the
exchange current
. At any
overpotential
η it is defined by the equation: U(η)=R ((ln(|I|))T1)p,η,cj,... where I is the current passing from the electrode into the electrolyte.
Source:
PAC, 1974, 37, 499. (Electrochemical nomenclature) on page 516 [Terms] [Paper]