In early electrode kinetic studies, the ideal and very homogenous mercury electrode was used. It is now evident that electrode design is becoming very sophisticated, particularly when advances in materials science are used to generate highly heterogeneous electrode materials. Thus, there is a tendency in electrochemistry nowadays to use far more complex electrodes than the historically important liquid mercury and pure solid metal surfaces. The new breed of highly heterogeneous electrodes imply that data analysis strategies in the future will also need to be more sophisticated. That is, use of models significantly more complex than used in this study with Butler-Volmer theory for electron transfer and mass transport by planar diffusion, as well as Bayesian forms of data analysis, will become increasingly essential if informative experimental versus simulation comparisons are to be reported. Distributions for all ten lower level adaptive MCMC samples of the reversible formal potential E 0 . The coloured histograms show the lower level posterior for each of the 10 repeat experiments P i (E 0 ). The solid line shows the predictive posterior for E 0 , which describes the distribution of each parameter that would be expected from another repeat of the experiment.