The simultaneous deposition of nickel and hydrogen on vitreous carbon

Linear sweep voltammograms for the dissolution of electrodeposited nickel indicate that a mixture of two nickel phases is usually deposited. These two phases have been identified as hydrogen-rich β-nickel and the solid solution α-nickel. The anodic charges obtained for each of these have been used in the analysis of the cathodic transient. The partial transient for α-nickel appears to obey the laws for three-dimensional growth and progressive nucleation. In the partial transient for β-nickel mass transfer of hydrogen ions becomes a rate-determining factor. The latter appears to be responsible for the maxima in the cathodic transients.