期刊
NANOSCALE
卷 6, 期 11, 页码 6173-6179出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr00421c
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资金
- 100 Talents Program of the Chinese Academy of Sciences, National Natural Science Foundation of China [21173226, 21376247]
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences [MPCS-2012-A-11, MPCS-2011-D-08, MPCS-2010-C-02]
Nanomaterials usually exhibit structure-dependent catalytic activity, selectivity, and stability. Herein, we report a universal approach for the synthesis of noble metal nanoparticles with a dendritic structure, which is based on the reduction of metal acetylacetonate precursors in oleylamine at a temperature of 160 degrees C. In this strategy, the metal acetylacetonate precursors are reduced into metal atoms by oleylamine and grow into metal nanoparticles, while oleylamine is simultaneously converted into oleylamide to protect the nanoparticles. The competition between particle aggregation and oleylamide passivation is essential to the formation of a large number of particle aggregates, which eventually grow into nanodendrites via Ostwald ripening process. In particular, in comparison with commercial PtRu/C catalysts, the alloy PtRuOs nanodendrites exhibited superior catalytic activity toward methanol oxidation.
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