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- W1998857117 abstract "A modified impregnation method was used to prepare highly dispersive carbon-supported PtRu catalyst (PtRu/C). Two modifications to the conventional impregnation method were performed: one was to precipitate the precursors ((NH4)2PtCl6 and Ru(OH)3) on the carbon support before metal reduction; the other was to add a buffer into the synthetic solution to stabilize the pH. The prepared catalyst showed a much higher activity for methanol electro-oxidation than a catalyst prepared by the conventional impregnation method, even higher than that of current commercially available, state-of-the-art catalysts. The morphology of the prepared catalyst was characterized using TEM and XRD measurements to determine particle sizes, alloying degree, and lattice parameters. Electrochemical methods were also used to ascertain the electrochemical active surface area and the specific activity of the catalyst. Based on XPS measurements, the high activity of this catalyst was found to originate from both metallic Ru (Ru0) and hydrous ruthenium oxides (RuOxHy) species on the catalyst surface. However, RuOxHy was found to be more active than metallic Ru. In addition, the anhydrous ruthenium oxide (RuO2) species on the catalyst surface was found to be less active." @default.
- W1998857117 created "2016-06-24" @default.
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- W1998857117 date "2009-12-01" @default.
- W1998857117 modified "2023-09-29" @default.
- W1998857117 title "High activity PtRu/C catalysts synthesized by a modified impregnation method for methanol electro-oxidation" @default.
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- W1998857117 doi "https://doi.org/10.1016/j.electacta.2009.07.045" @default.
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