XRD AND XAFS STUDIES OF CARBON SUPPORTED Pt-Ru ELECTROCATALYST IN A POLYMER-ELECTROLYTE-FUEL-CELL
نویسندگان
چکیده
Structures of carbon supported Pt-Ru catalyst in a polymer-electrolyte-fuel-cell (PEFC) were analyzed by X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAFS). XRD analysis identified a face-centered-cubic (fcc) alloy structure for Pt-Ru. XAFS analysis revealed that Pt and Ru atoms were, however, not randomly distributed in the Pt-Ru fcc lattice. A Pt atom was more likely surrounded by Pt atoms, whereas a Ru atom was likely surrounded by Ru atoms.
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