期刊
NANO LETTERS
卷 16, 期 2, 页码 1097-1103出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b04331
关键词
Monolayer MoS2; hydrogen evolution reaction; defects; oxygen plasma; hydrogen treatment
类别
资金
- Army Research Office MURI Grant [W911NF-11-1-0362]
- FAME Center
- U.S. DOE [DE-FG02-09ER46554]
- U.S. Department of Energy, Office of Science, Basic Energy Science, Materials Sciences and Engineering Division
- MARCO
- DARPA
MoS2 is a promising and low-cost material for electrochemical hydrogen production due to its high activity and stability during the reaction. However, the efficiency of hydrogen production is limited by the amount of active sites, for example, edges, in MoS2. Here, we demonstrate that oxygen plasma exposure and hydrogen treatment on pristine monolayer MoS2 could introduce more active sites via the formation of defects within the monolayer, leading to a high density of exposed edges and a significant improvement of the hydrogen evolution activity. These as-fabricated defects are characterized at the scale from macroscopic continuum to discrete atoms. Our work represents a facile method to increase the hydrogen production in electrochemical reaction of MoS2 via defect engineering, and helps to understand the catalytic properties of MoS2.
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