Abstract
Effects of variations in time period and voltage level were examined during the cyclic corrosion of Pt/C polymer electrolyte membrane (PEM) fuel cell catalyst. Decay rates in the electrochemical area were found to increase when voltage waves, square or triangular, were cycled at a shorter period, and when the lower voltage level was set below the platinum oxide reduction peak (<0.8 V vs reversible hydrogen electrode). Cell performance losses were compared to the Tafel prediction. The double layer current densities and approximate electrode wettabilities were found to increase upon cycling.
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