Electrochemical Nucleation and Growth Kinetics of Nanostructured Gold on Rotating Disc and Stationary Electrodes

Abstract

The kinetics of the electrocrystallization of nanostructured gold is investigated on both rotating disc and stationary glassy carbon electrodes. A possible mechanism of gold deposition is presented. A general expression of the current-time transient for the superposition of adsorption, three-dimensional nucleation and mixed charge transfer/diffusion controlled growth based on existing theories is reported for the kinetics on stationary electrodes. The experimentally recorded current-time transients are analyzed in terms of this model. Kinetic parameters are determined and their consequence is discussed.