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- W2008417184 abstract "Abstract The synergistic effect between Pt and WC is beneficial for methanol electro‐oxidation, and makes Pt–WC catalyst a promising anode candidate for the direct methanol fuel cell. This paper reports on the design and synthesis of small‐sized and contacting Pt–WC nanostructures on graphene that bring the synergistic effect into full play. Firstly, DFT calculations show the existence of a strong covalent interaction between WC and graphene, which suggests great potential for anchoring WC on graphene with formation of small‐sized, well‐dispersed WC particles. The calculations also reveal that, when Pt attaches to the pre‐existing WC/graphene hybrid, Pt particles preferentially grow on WC rather than graphene. Our experiments confirmed that highly disperse WC nanoparticles (ca. 5 nm) can indeed be anchored on graphene. Also, Pt particles 2–3 nm in size are well dispersed on WC/graphene hybrid and preferentially grow on WC grains, forming contacting Pt–WC nanostructures. These results are consistent with the theoretical findings. X‐ray absorption fine structure spectroscopy further confirms the intimate contact between Pt and WC, and demonstrates that the presence of WC can facilitate the crystallinity of Pt particles. This new Pt–WC/graphene catalyst exhibits a high catalytic efficiency toward methanol oxidation, with a mass activity 1.98 and 4.52 times those of commercial PtRu/C and Pt/C catalysts, respectively." @default.
- W2008417184 created "2016-06-24" @default.
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- W2008417184 date "2012-04-30" @default.
- W2008417184 modified "2023-10-12" @default.
- W2008417184 title "Small‐Sized and Contacting Pt–WC Nanostructures on Graphene as Highly Efficient Anode Catalysts for Direct Methanol Fuel Cells" @default.
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- W2008417184 doi "https://doi.org/10.1002/chem.201103011" @default.
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