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- W2075459678 abstract "Abstract The present work presents a method to encapsulate pre-synthesised Ru nanoparticles (NPs) by Pt using a polyol method without capping agents at various pH values (6, 7, 8 and 10). The structural and surface properties of the catalysts were characterised using X-ray diffraction, transmission electron microscopy, CO stripping, and energy-dispersive X-ray spectroscopy. The studies suggest that the pH during encapsulation of Ru by Pt plays an important role in controlling of shell composition. A core–shell catalyst with an alloy shell was obtained at a pH of 6, whereas a monometallic Pt shell was obtained at a pH of 10. The core–shell catalysts gave higher steady-state current for methanol oxidation: 10-fold higher for alloy shells and 5-fold higher for Pt-enriched shells compared to the pure Pt catalyst. It is suggested that the highest catalytic enhancement of the core–shell catalysts is obtained through the bi-functional character that dominates the alloy shells rather than the ligand-effect-promoted Pt-enriched shells." @default.
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- W2075459678 date "2013-12-01" @default.
- W2075459678 modified "2023-10-17" @default.
- W2075459678 title "Ru@Pt core–shell nanoparticles for methanol fuel cell catalyst: Control and effects of shell composition" @default.
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- W2075459678 doi "https://doi.org/10.1016/j.ijhydene.2013.02.056" @default.
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