Ni3S2-MoSx nanorods grown on Ni foam as high-efficient electrocatalysts for overall water splitting |
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| Affiliation: | 1. Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China;2. Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, PR China;1. The State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275, China;2. Collaborative Innovation Center of Sustainable Energy Materials, Guangxi University, Nanning 530004, PR China;1. School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China;2. School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Department of Materials Science and Engineering, NUANCE Center, Northwestern University, Evanston, IL 60208, USA;3. School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China;4. MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin 150080, China;5. Materials Genome Institute, Shanghai University, Shanghai 200444, China;1. Thin Film and Nanoscience Laboratory, Department of Physics, Jadavpur University, Kolkata, 700032, India;2. Department of Electronics &Telecommunication Engineering, Jadavpur University, Kolkata, 700032, India;3. School of Materials Science and Nanotechnology, Jadavpur University, Kolkata, 700032, India |
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| Abstract: | In order to solve the problem of large overpotential in water electrolysis for hydrogen production, transition metal sulfides are promising bifunctional electrocatalysts for hydrogen evolution reaction/oxygen evolution reaction that can significantly reduce overpotential. In this work, Ni3S2 and amorphous MoSx nanorods directly grown on Ni foam (Ni3S2-MoSx/NF) were prepared via one-step solvothermal process, which were used as a high-efficient electrocatalyst for overall water splitting. The Ni3S2-MoSx/NF composite exhibits very low overpotentials of 65 and 312 mV to reach 10 mA cm?2 and 50 mA cm?2 in 1.0 M KOH for HER and OER, respectively. Besides, it exhibits a low Tafel slope (81 mV dec?1 for HER, 103 mV dec?1 for OER), high exchange current density (1.51 mA cm?2 for HER, 0.26 mA cm?2 for OER), and remarkable long-term cycle stability. This work provides new perspective for further the development of highly effective non-noble-metal materials in the energy field. |
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| Keywords: | Electrocatalysts Hydrogen evolution reaction Oxygen evolution reaction Overall water splitting |
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