Abstract
The surface oxidation of platinum in 1 N HClO4 has been studied by means of the rigorous pre-treatment and fast “potentiodynamic” sequences previously described. Electrode capacitance was studied as a function of potential and surface coverage with “oxygen”. The capacitance was found to increase to a maximum with increasing anodic potential and to decrease with increasing extent of surface oxidation. A family of constant θo capacitance/potential plots was approximated. Current/time and charge/time plots at constant potential were obtained by means of an anodic step. The results allow speculation on the mechanism of the surface oxidation.
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