Multistep Electrochemical Reactions Involving Transport of Intermediates between the Near-electrode Layer and the Bulk Solution: The Kinetics of Two-Step Processes in Conditions of Non-steady-state Diffusion

Abstract

Results of numerical simulation of the kinetics of a two-stage electrochemical reaction with partial transport of intermediates between the near-electrode layer and the bulk solution in conditions of linear nonsteady-state diffusion of reactants are analyzed with use made of a theory of generalized variables. Dimensionless complexes (similitude criteria) that characterize the electrochemical reaction under consideration are obtained. Combinations of kinetic parameters of the first and second steps of the reaction, at which the reaction proceeds in a quasi-steady-state regime, are established. The conditions, at which rates of individual steps of electrochemical conversion are equal, are determined.