Abstract
SUMMARYThe kinetics of the early stages of the electrocrystallization of cobalt on a vitreous carbon electrode have been analyzed. The current time transients were found to have the same characteristics as those obtained for the deposition of nickel. The first electrocrystallization process is found to be the formation of a single monolayer of deposit on top of the vitreous carbon electrode. The next layer is formed via nucleation and three-dimensional growth. The analysis of the early stages of the current time transients revealed the possibility of codepositing two distinct crystalline forms of cobalt, e.g. the two allotropic fee and hcp structural phases. The formation of two forms of cobalt deposit is verified by the existence of two distinct anodic dissolution peaks when cobalt is dissolved by the application of an anodic potential sweep to the electrode.
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