Triangular Current-Sweep Chronopotentiometry at Rotating Disk and Stationary, Planar Electrodes

Abstract

A convenient series solution is presented for the evaluation of reactant and product concentrations during triangular current-sweep chronopotentiomelry at a rotating disk electrode, and at a stationary, planar electrode in the absence of free convection. The advantages of controlled-current proce~ses, relative to controlled-potential processes, for obtaining 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 paramelers.1