期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 133, 期 13, 页码 4718-4721出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja1117528
关键词
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资金
- NSFC [21021061, 20925103, 20923004, 20871100]
- Fok Ying Tung Education Foundation [121011]
- MOST of China [2011CB932403, 2009CB930703]
- NFFTBS [J1030415]
- NSF of Fujian Province [2009J06005]
- Key Scientific Project of Fujian Province [2009HZ0002-1]
High-index surfaces of a face-centered cubic metal (e.g., Pd, Pt) have a high density of low-coordinated surface atoms and therefore possess enhanced catalysis activity in comparison with low-index faces. However, because of their high surface energy, the challenge of chemically preparing metal nanocrystals having high-index facets remains. We demonstrate in this work that introducing amines as the surface controller allows concave Pt nanocrystals having {411} high-index facets to be prepared through a facile wet-chemical route. The as-prepared Pt nanocrystals display a unique octapod morphology with {411} facets. The presence of high-index {411} exposed facets endows the concave Pt nanocrystals with excellent electrocatalytic activity in the oxidation of both formic acid and ethanol.
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