Cyclic voltammetric response of homogeneous catalysis of electrochemical reactions: Part 1. A theoretical and numerical approach for EE’C scheme

Abstract

This paper reports the mathematical modelling of homogeneous redox catalysis of electrochemical reactions for the EE’C scheme. This model is described by the system of nonlinear differential equations for which the nonlinear term is related to homogeneous reaction. The concentration of species and current–voltage curves at a planar electrode has been calculated by solving the nonlinear equations using a simple and new innovative approach which is named as Rajendran-Joy method(RJM). In particular, the limiting current and plateau current is highly sensitive to the solution flow rate and the concentrations of the mediator and substrate employed. The effect of two dimensionless parameters that group the experimental intrinsic and operational parameters on current is discussed. Our analytical results for cyclic voltammetry current are compared with simulation results, and satisfactory agreement is noted. The characteristic of concentration and the current–potential response for the extreme values of parameters are also provided.