标题：Structural and Electronic Optimization of MoS2 Edges for HydrogenEvolution
作者：Hao Wang,1,2Xu Xiao,3 Shuyuan Liu,1Chao-Lung Chiang,4Xiaoxiao Kuai,1 Chun-Kuo Peng,4,5Yu-Chang Lin,4,5Xing Meng,3,6 Jianqing Zhao,1 Jin-Ho Choi,1* Yan-Gu Lin,4Jong-Min Lee,2*and Lijun Gao1*
单位：1 Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable EnergyTechnologies of Jiangsu Province, College of Energy, Soochow University, Suzhou 215006, China
2 School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
3 A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia,Pennsylvania 19104, United States
4 National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan, R.O.C.
5 Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C.
6 Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University,Changchun 130012, China
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.