The Proton Exchange Membrane Fuel Cell Performance of a Carbon Supported PtMo Catalyst Operating on Reformate

The proton exchange membrane fuel cell performance of carbon-supported Pt, PtRu, and PtMo catalysts on reformate gas mixtures was investigated. The catalysts were tested as low Pt loaded electrodes in membrane electrode assemblies at 80°C using H 2 ; 10, 40, 100 ppm CO in H 2 ; 25% CO 2 in H 2 , and 40 ppm CO/25% CO 2 in H 2 reformate gas mixtures as the fuel stream. The PtMo catalyst showed better CO tolerance than the PtRu catalyst at 100 ppm, but showed poorer CO 2 tolerance to both Pt and PtRu. With 40 ppm CO/25% CO2 in H 2 . PtMo showed inferior overall reformate tolerance to PtRu.