Kinetics of lead dioxide electrodeposition from nitrate solutions containing colloidal TiO(2)

The influence of particles of colloidal titanium dioxide on lead dioxide electrodeposition from nitrate electrolytes was studied in the work. Addition of the nanostructured TiO(2) particles to the electrolyte increases the rate of lead dioxide formation. This enhancement is ascribed to extra nucleation sites contributed by Ti-O(center dot) radicals generated at the TiO(2) surface by OH(center dot) species, in turn formed by discharge of water. A four stages kinetics scheme is proposed for description of the process of lead dioxide electrodeposition in presence of oxides of the valve metal in colloidal solutions. It is suggested that the presence of TiO(2) nanoparticles influences crystallization, charge transfer and diffusion stages.