期刊
SMALL METHODS
卷 3, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smtd.201900083
关键词
2D materials; black phosphorus; electrocatalyst; metal doping; phosphorene
资金
- National Natural Science Foundation of China [51702352]
- Shenzhen Science and Technology Research Funding [JCYJ20170818162909200, JCYJ20170413165807008]
- China Postdoctoral Science Foundation [2018T110897]
- Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-SLH034]
- Science and Technology Service Network Initiative, CAS [KFJ-STS-SCYD-102]
- City University of Hong Kong Strategic Research Grant (SRG) [7005105]
- Hong Kong Research Grants Council (RGC) General Research Funds (GRF) [U 11205617]
2D materials with large specific surface area and robust mechanical properties are appropriate for electrocatalysis. However, the unsatisfactory adsorption energy and limited active sites restrict their commercial application. Herein, a facile and rapid electrochemical strategy enabling synchronous exfoliation and doping is designed to directly synthesize metal-doped 2D materials from the bulk crystals. By using black phosphorus as a model, various metal doped phosphorene such as BP(Co), BP(Mo), and BP(Ni) is obtained, and a synergistic synthesis mechanism is proposed. Notably, the dopant introduces electronic band transformation, charge redistribution, and state occupation confirmed by density functional theory calculations. Owing to the enhanced electro-conductivity, abundant metal-P active sites, and optimized adsorption energy by doping, the BP(metal) exhibits enhanced hydrogen evolution reaction activities and stability in comparison to the bare phosphorene. Particularly, BP((Co) )presents highest activity with a potential of 0.294 V at 10 mA cm(-2 )(the current density is normalized with electrochemical surface area by using a double-layer capacitance method). This study provides new access to synthesize highly efficient electrocatalysts, and also enriches the structure modulation means for layered 2D materials.
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