Abstract
The electrodeposition of silver on platinum from solutions in the molten nitrate eutectic NaNO 3—KNO 3 has been studied using chronopotentiometry, cyclic voltammetry and the potential step technique. In each case, the early stages of metal deposition are shown to be controlled by a nucleation process. Similar results were also obtained from studies of electrodeposition from aqueous solution, ie of silver on platinum and graphite and of mercury on graphite. Unless allowance is made for the effects of nucleation, anomalous diffusion coefficients will be obtained. The potentiostatic growth transients are in accord with a process of instantaneous nucleation and subsequent hemispherical growth, although the observed concentration dependence is at variance with that predicted by existing theories.
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