Kinetics of electrocrystallization of PbO2 on glassy carbon electrodes: partial inhibition of the progressive three-dimensional nucleation and growth

Electrocrystallization of PbO2 on glassy carbon electrodes was studied in 1 M HNO3 + 0.1 M Pb(NO3)2 using cyclic voltammetry rotating disk electrode experiments, chronoamperometry, and scanning electron microscopy. In order to explain the experimental curves, a new theory of three-dimensional nucleation and progressive growth was developed and applied to analyze the experimental chronoamperometric curves. Numerical approximations led to the determination of kinetic parameters.Consellería de Cultura, Educación y Ciencia de la Generalidad Valenciana (project GV-2231-94) and D.G.I.C.Y.T. (project QUI97-1086)