Surface Engineering of MoS2 via Laser-Induced Exfoliation in Protic Solvents

被引：30
作者：
Gao, Zhi-Wen [1 ,2 ]
Liu, Mengjie [1 ,2 ]
Zheng, Weiran [1 ,2 ]
Zhang, Xiandi [1 ,2 ]
Lee, Lawrence Yoon Suk [1 ,2 ]
机构：
[1] Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Hung Hom, Kowloon, Hong Kong, Peoples R China
[2] Hong Kong Polytech Univ, State Key Lab Chem Biol & Drug Discovery, Hung Hom, Kowloon, Hong Kong, Peoples R China
来源：
SMALL | 2019年 / 15卷 / 44期
关键词：
laser exfoliation in liquid; molybdenum disulfide; phase transition; solvent effect; sulfur vacancy; MOLYBDENUM-DISULFIDE; PHASE-TRANSITION; SULFUR VACANCIES; 1T-PHASE MOS2; BASAL-PLANE; EVOLUTION; NANOSHEETS; SITES;
D O I：
10.1002/smll.201903791
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
With excellent performance in the hydrogen evolution reaction (HER), molybdenum disulfide (MoS2) is considered a promising nonprecious candidate to substitute Pt-based catalysts. Herein, pulsed laser irradiation in liquid is used to realize one-step exfoliation of bulk 2H-MoS2 to ultrastable few-layer MoS2 nanosheets. Such prepared MoS2 nanosheets are rich in S vacancies and metallic 1T phase, which significantly contribute to the boosted catalytic HER activity. Protic solvents play a pivotal role in the production of S vacancies and 2H-to-1T phase transition under laser irradiation. MoS2 exfoliated in an optimal solvent of formic acid exhibits outstanding HER activity with an overpotential of 180 mV at 10 mA cm(-2) and Tafel slope of 54 mV dec(-1).
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页数：7
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