Evaluation of a naive model for square wave voltammetry at a microdisk electrode

A square wave voltammetric waveform (SWV) was applied to an inlaid microdisk electrode in a solution of K4[Fe(CN)6]. A simple model relying on the assumption of steady state current throughout the scan was used to model the current potential behaviour. However, experimental peak current magnitudes were between 30% and 50% greater than those predicted by the model. The model predicts an increase of peak current and peak width at half height with pulse height Esw and frequency f, and non effect of the step height, ΔEs. Experimental peak current magnitudes were found to increase with increasing Esw but were not affected by f or ΔEs.