Abstract
The deposition of nickel and silver on platinum from the 
eutectic at 400°C has been studied using the chronopotentiometric, cyclic voltammetric, and potential step techniques. An observed predeposition of nickel on platinum was observed to take place at 0.5V anodic to the equilibrium potential between nickel in bulk and the solution of its ions. The predeposition process was studied by an a‐c impedance method and delineated as the formation of an adsorbed monolayer. A similar but less well‐defined predeposition step was observed with silver at 0.1V anodic to the reversible potential. Notwithstanding the predeposition phenomena, diffusion coefficients for both metal ions were determined by each of the voltammetric techniques and found to be in reasonable agreement with each other and with previously reported values.