期刊
NPG ASIA MATERIALS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/am.2014.65
关键词
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资金
- National Natural Science Foundation of China [11174023, 51371015, 51331002]
- Beijing Municipal Research Project for Outstanding Doctoral Thesis Supervisors [20121000603]
- Beijing Natural Science Foundation [2142018]
- Fundamental Research Funds for the Central Universities
A synthetic route to achieve core/shell nanostructures consisting of noble metal cores and single crystal semiconductor shells with different crystal systems is proposed, which involves a simple phosphorization process from corresponding bimetallic heterostructures. The triphenylphosphine is designed to serve as both a capping agent and a phosphorous source during the formation of Au/Ni12P5 core/shell nanoparticles (NPs) from Au-Ni bimetallic heterodimers. The semiconductor shells of the obtained Au/Ni12P5 nanostructures are controlled to form single crystals with a thickness of similar to 5 nm. The structure-dependent supercapacitor properties of Au-modified Ni12P5 nanostructures were further investigated. The synergistic effect of the metal/semiconductor nanostructure is observed to be superior to its oligomer-like counterpart when serving as a supercapacitor electrode. The specific capacitance of an electrode fabricated from core/shell NPs is 806.1 F g(-1) with a retention of 91.1% after 500 charge-discharge cycles.
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