Triangular current-sweep chronopotentiometry at rotating disk and stationary,planar electrodes

A convenient series solution is presented for the evaluation of reactant and product concentrations during triangular current-sweep chronopotentiometry at a rotating disk electrode and at a stationary, planar electrode in the absence of free convection. The advantages of controlled-current processes, relative to controlled-potential processes, for otaining kinetic, thermodynamic, and transport information are elucidated. Theoretical predictions are compared with results obtained for the deposition of cadmium from a dilute, aqueous, cadmium sulfate + potassium sulfate electrolyte. A multidimensional optimization routine, the Levenberg-Marquardt algorithm, is used to evaluate physicochemical parameters.