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Comparative Study of On‐Line Membrane Electrode Assembly Activation Procedures in Proton Exchange Membrane Fuel Cell

The major objectives of this study are to identify the best activation procedure between commonly used procedures that can significantly reduce the conditioning duration and to understand the change in interfacial properties during conditioning. In order to do that, three on‐line activation procedures were employed for activating of identical MEAs in PEMFC and studied by polarization curve and electrochemical impedance spectroscopy (EIS). These methods are constant current (0.25 A cm–2) for 19 h, constant voltage (0.6 V) for 9 h, and USFCC protocol.