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- W2912656965 abstract "This paper details the physical and electrochemical characterization of hydrous tin-oxide supported noble-metal PEMFC cathode catalysts. The hydrous tin oxide (SnOx·yH2O) is precipitated from aqueous tin salt solutions by addition of NH4OH, and then impregnated with Au, Pd, or Pt metal ions. The physical and structural properties of the noble metal-SnOx·yH2O catalysts are investigated using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), nitrogen physisorption surface-area analysis, and powder X-ray diffraction (XRD). The SnOx·yH2O and noble metal-SnOx·yH2O catalysts are electrochemically evaluated by rotating disk electrode (RDE) voltammetry. Tafel plots indicate that all catalysts are active for oxygen reduction. In the case of the Au-SnOx·yH2O catalyst enhanced catalytic activity is observed relative to Au or SnOx·yH2O alone, suggesting a synergy between the noble metal and oxide support. These results demonstrate the potential use of metal oxide supports for the successful preparation of ORR-active Pt-free catalysts." @default.
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- W2912656965 date "2004-01-01" @default.
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- W2912656965 title "Platinum and Non-Platinum-Metal Tin Oxide Supported Catalysts for PEMFC Cathodes" @default.
- W2912656965 doi "https://doi.org/10.1149/200421.0199pv" @default.
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