Engineering of molybdenum sulfide nanostructures towards efficient electrocatalytic hydrogen evolution |
| |
| Affiliation: | 1. School of Materials Science & Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Yangpu District, Shanghai 200093, PR China;2. Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, PR China;1. Department of Physics, Institute of Basic Science, Daegu University, Gyeongsan 712-714, Republic of Korea;2. Department of Materials-Energy Science and Engineering, Institute of Industry and Technique, Daegu University, Gyeongsan 712-714, Republic of Korea;1. Sustainable Energy Laboratory, Faculty of Materials Science and Chemistry, China University of Geoscinces (Wuhan), 388 Lumo Road, Wuhan, 430074, PR China;2. College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang, 277160, PR China;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, PR China;2. College of Science, China University of Petroleum (East China), Qingdao 266580, PR China;1. Centre for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon 16419, Republic of Korea;2. Department of Chemistry, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea;3. Department of Energy Science, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea;4. Department of Physics, Banaras Hindu University (BHU), Varanasi, India |
| |
| Abstract: | Water splitting is an appealing way of producing hydrogen fuel, which requires efficient and affordable electrode materials to make the overall process viable. In the last couple years, abundant transition metals (and their compounds and hybrids) attracted ever-growing attention as the alternatives of noble metals. Particularly the layered transition metal dichalcogenide (TMDs) are interesting with their stability and promising electrocatalytic performance for hydrogen evolution reaction (HER). However, the neat TMDs are often poor in terms of the abundance of catalytically active sites and electrical conductivity, which limit their application potential significantly. Herein, as a proof-of-concept, we report on the design of a high-performance electrocatalyst system formed by the decoration of ultrasmall molybdenum sulfide (MoS2) nanosheets on carbon nanotubes (CNTs). The ultrasmall MoS2 nanosheets provide distorted lattice, confined size and rich defects, which endows the resulting electrocatalysts (MoS2/CNT) with abundant active sites. The CNTs, on the other hand, serve as the conductive net for ensuring electrocatalytic performance. As a result, the hybrid electrocatalyst exhibits excellent electrocatalytic performance for HER, achieving a large current density of 100 mA cm?2 at overpotential of only 281 mV and a small Tafel slope of 43.6 mV dec?1 along with a decent stability. Our results are of high interest for electrocatalyst technologists as well as hydrogen fuel researchers. |
| |
| Keywords: | Confinement effect Active site enrichment Electrocatalysts Hydrogen evolution reaction |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
