Abstract
PtRuSnO2/C catalyst was prepared by the ethylene glycol method to improve the CO tolerance for polymer electrolyte membrane fuel cell. The prepared catalysts were characterized by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), CO stripping voltammetry and single cell performance measurements. Based on XRD and STEM results, PtRuSnO2/C catalyst exhibited a slightly smaller particle size than PtRu/C catalyst due to the addition of SnO2. CO stripping voltammetry showed that SnO2 promoted CO electro-oxidation on PtRuSnO2/C catalyst at low potential. And PtRuSnO2/C catalyst gave a better single cell performance under 500 ppm CO-contaminated H2. These results suggested that the performance improvement was due to the combined promotional effect of SnO2 and Ru species on Pt for CO tolerance.
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