Approximate analytical expressions are derived for the limiting current at the rotating-disc electrode for the ECE mechanism when the chemical step is irreversible. Four cases are identified corresponding to both pseudo-first-order and second-order kinetics. Each case is discussed and schematic concentration profiles given. The relationship between the cases is illustrated by a case diagram.
P. N. Bartlett and V. Eastwick-Field, J. Chem. Soc., Faraday Trans., 1993, 89, 213 DOI: 10.1039/FT9938900213
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