標題: Structural and Electronic Optimization of MoS2 Edges for Hydrogen Evolution
作者: Wang, Hao
Xiao, Xu
Liu, Shuyuan
Chiang, Chao-Lung
Kuai, Xiaoxiao
Peng, Chun-Kuo
Lin, Yu-Chang
Meng, Xing
Zhao, Jianqing
Choi, Jinho
Lin, Yan-Gu
Lee, Jong-Min
Gao, Lijun
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 20-Nov-2019
摘要: 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.
URI: http://dx.doi.org/10.1021/jacs.9b09932
http://hdl.handle.net/11536/153435
ISSN: 0002-7863
DOI: 10.1021/jacs.9b09932
期刊: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume: 141
Issue: 46
起始頁: 18578
結束頁: 18584
Appears in Collections:Articles