Convolutive modelling of the disk electrode geometry under reversible conditions

Abstract

The disk electrode is one of the most readily constructed electrode geometries but the perimetric discontinuity complicates the theoretical analysis. Under reversible conditions, this system simplifies to a situation that can be described by a convolution expression and can therefore be modelled by the method known as convolutive modelling. Convolutive modelling is here employed to simulate cyclic voltammograms at a disk electrode; those results are compared to fast quasi-explicit finite difference digital simulations. The inaccuracy of the latter method is thereby exposed. In addition, current reversal chronopotentiometry at a disk is modelled.