Simulations for the mediated oxidative reduction of 4-BrBN (i.e., for a solution containing DiMeFc, C2O4 2-, and 4-BrBN) require a total of 44 parameters (i.e., diffusion coefficients, thermodynamic and rate parameters for heterogeneous and homogenous reactions). In general, fitting simulated voltammetric responses to experimental data using more than 3 or 4 adjustable parameters is an unreasonable task that often leads to non-unique values of the fitting parameters.