期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 5, 页码 1579-1585出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta09261b
关键词
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资金
- Major International (Regional) Joint Research Project [51210002]
- National Basic Research Program of China [2015CB932304]
- Guangzhou Automobile Group Project [XW6]
- Danish project of Initiative toward Non-precious Metal Polymer Fuel Cells [4106-000012B]
Monodisperse alloyed PtCu nanoparticles (NPs) have been synthesized via a facile one-pot hydrothermal method. In addition, this is the first time to obtain self-assembled NPs as a hexagonal array with six-fold symmetry in the PtCu NP system. In our synthesis, oleylamine (OAM) is essential for the self-assembly of uniform PtCu NPs. These PtCu spheres have a diameter of 4.78 +/- 0.28 nm with a Pt-rich skin and are evaluated as a catalyst for the methanol oxidation reaction. The activity of the PtCu nanoparticles is 34.81 mA cm(-2), while that of the PtCu/C catalysts is 24.6 mA cm(-2), which is about 6.216 times and 4.4 times higher than that of the Pt/C catalyst (5.6 mA cm(-2)). Our studies provide a simple approach to synthesize monodisperse PtCu NPs with Pt-rich skin, making it possible to develop highly active catalysts for methanol oxidation.
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