期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 141, 期 37, 页码 14496-14500出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b05197
关键词
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资金
- MOE [MOE2015-T2-2-057, MOE2016-T2-2-103, MOE2017-T2-1-162, 2016-T1-002-051, 2017-T1-001-150, 2017-T1-002-119]
- NTU under Start-Up Grant in Singapore [M4081296.070.500000]
- Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-JSC035]
- National Natural Science Foundation of China [51672307, 51421002]
- Bo Xin Project from Ministry of Human Resources and Social Security of the PRC
- ITC via Hong Kong Branch of National Precious Metals Material Engineering Research Center
- City University of Hong Kong
In this work, we report an element segregation phenomenon in two-dimensional (2D) core-shell nanoplates, subsequently resulting in the formation of yolk-cage nanostructures after selective electrochemical etching. By using PtCu nanoplates as templates, PtCu@Pd core-shell nanoplates are formed. Interestingly, during the growth of Ru on the PtCu@Pd core-shell nanoplates, due to the selective element diffusion, PtCuPd@PdCu@Ru nanoplates are obtained. After selectively etching of PdCu in PtCuPd@PdCu@Ru using electrochemical method, the PtCuPd@Ru yolk-cage nanostructures are obtained. As a proof-of-concept application, this unique nanostructure shows superior electrocatalytic activity and stability toward the methanol oxidation reaction as compared to the PtCu nanoplates and commercial Pt/C catalyst.
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