文摘
In order to design Pt-free efficient cathode catalyst and promote the commercialization of fuel cells, different atomic ratio of carbon-supported Pd-W alloy catalysts were developed for oxygen reduction reaction (ORR). X-ray diffraction (XRD) results show the Pd-W alloys have the similar lattice characteristics to pure Pd. Transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS) results show that the Pd-W alloys disperse on the surface of carbon support uniformly. The results of the electrochemical tests show that the Pd19W/C has two-fold mass activity over Pd/C, which is hopeful for the application as low-cost cathode catalyst.