期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 118, 期 2, 页码 1182-1190出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp402620p
关键词
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资金
- National Natural Science Foundation of China [51373088, 51073082]
- National Basic Research Program of China [2012CB722606]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars
- Qingdao Municipal Science and Technology Program
- Basic Research Project [12-1-4-3-(7)-jch, 12-1-4-3-(25)-jch]
- Chongqing Key Laboratory of Micro/Nano Materials Engineering and Technology [KFJJ1202]
- MOE Key Laboratory of Organo-silicon Chemistry and Material Technology of Ministry of Education [YJG2010-02]
- State Key Laboratory of Chemical Resource Engineering [CRE-2012-C-204]
- State Key Laboratory of Molecular Engineering of Polymers (Fudan University) [K2013-20]
- natural science foundation of Shandong Province [ZR2012EMM003]
The production of effective loading and direct deposition of Pt nanoparticles on graphene is difficult because this intriguing carbon material has highly hydrophobic surface properties. In this work, Pt/graphene sheet (GS) composites were successfully synthesized via a simple, effective, and environmentally benign one-pot supercritical carbon dioxide deposition route using dimethyl (1,5-cyclooctadiene) platinum(II) (PtMe2COD) as a soluble organometallic precursor. The preparation process obviates the need for solvents, which are often volatile and toxic. No post-treatment processes such as washing and drying are needed. Transmission electron microscopy shows that ultrafine metal nanoparticles with an average size as small as similar to 2 nm are densely and evenly decorated on the hydrophobic surfaces of. GS at Pt loadings up to 80 wt %. Electrochemical studies reveal that the prepared Pt/GS composites possess notably higher catalytic activity and better stability toward methanol electrooxidation in comparison with Pt/multiwalled carbon nanotube and Pt/carbon black composites. The supercritical carbon dioxide deposition method could be easily extended to the fabrication of other graphene-based metal composites with desirable properties by selecting suitable organometallic precursors.
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