Journal
NANO LETTERS
Volume 19, Issue 5, Pages 2758-2764Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b04104
Keywords
Phase transition; ultrafast spectroscopy; electrocatalytic; molybdenum disulfide; hydrogen evolution
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Funding
- National Key Research and Development Programme of China [2016YFFA0200400]
- Natural Science Foundation of China [51571100, 51872116, 51602305]
- Programme for JLU Science and Technology Innovative Research Team (JLUSTIRT) [2017TD-09]
- Peking University
- Young Thousand Talented Programme
- Fundamental Research Funds for the Central Universities
- Australian Research Council (ARC) Future Fellowship [FT150100450]
- Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) [CE170100039]
- China Postdoctoral Science Foundation [2018M633127]
- Natural Science Foundation of Guangdong Province [2018A030310602]
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Metallic 1T-phase transition metal dichalcogenides (TMDs) are of considerable interest in enhancing catalytic applications due to their abundant active sites and good conductivity. However, the unstable nature of 1T-phase TMDs greatly impedes their practical applications. Herein, we developed a new approach for the synthesis of highly stable 1T-phase Au/Pd-MoS2 nanosheets (NSs) through a metal assembly induced ultrastable phase transition for achieving a very high electrocatalytic activity in the hydrogen evolution reaction. The phase transition was evoked by a novel mechanism of lattice-mismatch-induced strain based on density functional theory (DFT) calculations. Raman spectroscopy and transmission electron microscopy (TEM) were used to confirm the phase transition on experimental grounds. A novel heterostructured 1T MoS2-Au/Pd catalyst was designed and synthesized using this mechanism, and the catalyst exhibited a 0 mV onset potential in the hydrogen evolution reaction under light illumination. Therefore, this method can potentially be used to fabricate 1T-phase TMDs with remarkably enhanced activities for different applications.
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