Structural and Electronic Optimization of MoS2 Edges for Hydrogen Evolution

Hao Wang; Xu Xiao; Shuyuan Liu; Chao Lung Chiang; Xiaoxiao Kuai; Chun Kuo Peng; Yu Chang Lin; Xing Meng; Jianqing Zhao; Jinho Choi; Yan Gu Lin; Jong Min Lee; Lijun Gao

doi:10.1021/jacs.9b09932

Structural and Electronic Optimization of MoS₂ Edges for Hydrogen Evolution

Hao Wang, Xu Xiao, Shuyuan Liu, Chao Lung Chiang, Xiaoxiao Kuai, Chun Kuo Peng, Yu Chang Lin, Xing Meng, Jianqing Zhao, Jinho Choi^*, Yan Gu Lin, Jong Min Lee, Lijun Gao

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

338 Citations (Scopus)

Abstract

The activity and accessibility of MoS₂ edge sites are critical to deliver high hydrogen evolution reaction (HER) efficiency. Here, a porous carbon network confining ultrasmall N-doped MoS₂ nanocrystals (N-MoS₂/CN) is fabricated by a self-templating strategy, which realizes synergistically structural and electronic modulations of MoS₂ edges. Experiments and density functional theory calculations demonstrate that the N dopants could activate MoS₂ edges for HER, while the porous carbon network could deliver high accessibility of the active sites from N-MoS₂ nanocrystals. Consequently, N-MoS₂/CN possesses superior HER activity with an overpotential of 114 mV at 10 mA cm^-2 and excellent stability over 10 h, delivering one of best MoS₂-based HER electrocatalysts. Moreover, this study opens a new venue for optimizing materials with enhanced accessible catalytic sites for energy-related applications.

Original language	English
Pages (from-to)	18578-18584
Number of pages	7
Journal	Journal of the American Chemical Society
Volume	141
Issue number	46
DOIs	https://doi.org/10.1021/jacs.9b09932
Publication status	Published - Nov 20 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
Copyright © 2019 American Chemical Society.

ASJC Scopus Subject Areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

Access to Document

10.1021/jacs.9b09932

Cite this

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title = "Structural and Electronic Optimization of MoS2 Edges for Hydrogen Evolution",

abstract = "The activity and accessibility of MoS2 edge sites are critical to deliver high hydrogen evolution reaction (HER) efficiency. Here, a porous carbon network confining ultrasmall N-doped MoS2 nanocrystals (N-MoS2/CN) is fabricated by a self-templating strategy, which realizes synergistically structural and electronic modulations of MoS2 edges. Experiments and density functional theory calculations demonstrate that the N dopants could activate MoS2 edges for HER, while the porous carbon network could deliver high accessibility of the active sites from N-MoS2 nanocrystals. Consequently, N-MoS2/CN possesses superior HER activity with an overpotential of 114 mV at 10 mA cm-2 and excellent stability over 10 h, delivering one of best MoS2-based HER electrocatalysts. Moreover, this study opens a new venue for optimizing materials with enhanced accessible catalytic sites for energy-related applications.",

author = "Hao Wang and Xu Xiao and Shuyuan Liu and Chiang, \{Chao Lung\} and Xiaoxiao Kuai and Peng, \{Chun Kuo\} and Lin, \{Yu Chang\} and Xing Meng and Jianqing Zhao and Jinho Choi and Lin, \{Yan Gu\} and Lee, \{Jong Min\} and Lijun Gao",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = nov,

day = "20",

doi = "10.1021/jacs.9b09932",

language = "English",

volume = "141",

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journal = "Journal of the American Chemical Society",

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T1 - Structural and Electronic Optimization of MoS2 Edges for Hydrogen Evolution

AU - Wang, Hao

AU - Xiao, Xu

AU - Liu, Shuyuan

AU - Chiang, Chao Lung

AU - Kuai, Xiaoxiao

AU - Peng, Chun Kuo

AU - Lin, Yu Chang

AU - Meng, Xing

AU - Zhao, Jianqing

AU - Choi, Jinho

AU - Lin, Yan Gu

AU - Lee, Jong Min

AU - Gao, Lijun

PY - 2019/11/20

Y1 - 2019/11/20

N2 - The activity and accessibility of MoS2 edge sites are critical to deliver high hydrogen evolution reaction (HER) efficiency. Here, a porous carbon network confining ultrasmall N-doped MoS2 nanocrystals (N-MoS2/CN) is fabricated by a self-templating strategy, which realizes synergistically structural and electronic modulations of MoS2 edges. Experiments and density functional theory calculations demonstrate that the N dopants could activate MoS2 edges for HER, while the porous carbon network could deliver high accessibility of the active sites from N-MoS2 nanocrystals. Consequently, N-MoS2/CN possesses superior HER activity with an overpotential of 114 mV at 10 mA cm-2 and excellent stability over 10 h, delivering one of best MoS2-based HER electrocatalysts. Moreover, this study opens a new venue for optimizing materials with enhanced accessible catalytic sites for energy-related applications.

AB - The activity and accessibility of MoS2 edge sites are critical to deliver high hydrogen evolution reaction (HER) efficiency. Here, a porous carbon network confining ultrasmall N-doped MoS2 nanocrystals (N-MoS2/CN) is fabricated by a self-templating strategy, which realizes synergistically structural and electronic modulations of MoS2 edges. Experiments and density functional theory calculations demonstrate that the N dopants could activate MoS2 edges for HER, while the porous carbon network could deliver high accessibility of the active sites from N-MoS2 nanocrystals. Consequently, N-MoS2/CN possesses superior HER activity with an overpotential of 114 mV at 10 mA cm-2 and excellent stability over 10 h, delivering one of best MoS2-based HER electrocatalysts. Moreover, this study opens a new venue for optimizing materials with enhanced accessible catalytic sites for energy-related applications.

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