Cyclic voltammetry curves of two kinds of electrode reactions based on a simple E mechanism with unequal diffusion coefficients and the ECirre,, mechanism under convergent, linear and 'mixed' (convergent/linear) diffusion conditions are developed by numerical simulation. We show that these two types of distinct electrode reactions can respond almost identically under cyclic voltammetry and with similar variation with scan rate under mixed and linear diffusion conditions. (C) 2015 Elsevier B.V. All rights reserved.