Abstract
In-line direct gas mass spectroscopy (DGMS) was applied for real-time monitoring of exhausted gas of a polymer electrolyte fuel cell (PEFC) in order to investigate degradation behaviors of the fuel cell. It was shown that hydrogen emission in cathode exhausted gas was larger under OCV operation than load operation, and that intermittent peaks of carbon dioxide emission in cathode exhausted gas were detected with positive sweep of cell potential, suggesting that carbon corrosion of the cathode catalyst proceed under load cycle operation.
