期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 33, 页码 11594-11597出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja5058532
关键词
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资金
- State Key Project of Fundamental Research for Nanoscience and Nanotechnology [2011CB932401, 2011CBA00500]
- National key Basic Research Program of China [2012CB224802]
- National Natural Science Foundation of China [21221062, 21171105, 21322107, 21131004]
We have developed a priority-related chemical etching method to transfer the starting Pt-Ni polyhedron to a nanoframe. Utilizing the lower electro-negativity of Ni in comparison to Au atoms, in conjunction with the galvanic replacement of catalytically active Au to Ni tops, a unique Au island on a Pt-Ni trimetallic nanoframe is achieved. The design strategy is based on the structural priority mechanism of multimetallic nanocrystals during the synthesis and thus can be generalized to other analogous metal-bimetallic nanocrystal combinations (such as Pd and Cu islands on Pt-Ni nanoframes), which is expected to pave the way for the future development of efficient catalysts.
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