Abstract
A new formulation of the kinetics of electrochemical reactions mediated by redox films is proposed for the case of an irreversible cross-exchange reaction in the context of rotating disc electrode voltammetry. It involves the normalization of the substrate concentration versus its value at the film boundary interface. The overall kinetics are then shown to depend on only two dimensionless parameters. Procedures for analysing the effects of the rotation speed and the other experimental parameters are proposed. The construction of a kinetic zone diagram summarizing the variation of the kinetic control with the various parameters is useful for defining the optimal performances of the film.
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