Abstract
The effect of glycine addition to a Co plating bath on the electrochemistry of Co electrodeposition is discussed based on results from cyclic voltammetry experiments. Analysis of the observed values of current crossover potentials (EC ) for all studied systems shown the behaviors expected from thermodynamic calculations. However, thermodynamic arguments cannot explain the many differences observed in the potentiodynamic E/I profiles for sulfate based glycine-free and glycine-containing baths. Some kinetic parameters (Tafel slopes) were obtained from the CVs run at slow scan rates, and they suggest that Co2+ reduction follows different mechanisms on glycine-free and glycine-containing electrolytic solutions, with the latter also showing dependence on solution pH.
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