期刊
NATURE COMMUNICATIONS
卷 7, 期 -, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/ncomms10672
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资金
- Office Of The Director
- EPSCoR [GRANTS:13762384, 1003970] Funding Source: National Science Foundation
Metallic-phase MoS2 (M-MoS2) is metastable and does not exist in nature. Pure and stable M-MoS2 has not been previously prepared by chemical synthesis, to the best of our knowledge. Here we report a hydrothermal process for synthesizing stable two-dimensional M-MoS2 nanosheets in water. The metal-metal Raman stretching mode at 146 cm(-1) in the M-MoS2 structure, as predicted by theoretical calculations, is experimentally observed. The stability of the M-MoS2 is associated with the adsorption of a monolayer of water molecules on both sides of the nanosheets, which reduce restacking and prevent aggregation in water. The obtained M-MoS2 exhibits excellent stability in water and superior activity for the hydrogen evolution reaction, with a current density of 10mAcm(-2) at a low potential of -175mV and a Tafel slope of 41mV per decade.
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