In-situ synthesis of porous Ni2P nanosheets for efficient and stable hydrogen evolution reaction |
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| Affiliation: | 1. College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 400047, China;2. Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China;1. Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India;2. Advanced Materials & Devices Metrology Division, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi, 110012, India;3. CSIR Advanced Materials and Processes Research Institute Bhopal, Madhya Pradesh, India, 462026;1. Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China;2. Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China;1. College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, 310018, PR China;2. Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, PR China;1. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi''an 710072, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. High School Affiliated to Nanjing Normal University, Nanjing 210003, China;1. International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga, Portugal;2. Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, 2 North First Street, Zhongguancun, Beijing 100190, China;3. School of Engineering and Information Technology, Murdoch University, Murdoch, West Australia, 6150, Australia |
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| Abstract: | The design and development of highly efficient and stable non-noble metal electrocatalysts for hydrogen evolution reaction (HER) have attracted increasing attention. However, some key issues related to large overpotential, high cost and poor stability at high current density still remains challenging. In this work, we report a facile in-situ integration strategy of porous Ni2P nanosheet catalysts on 3D Ni foam framework (P Ni2P/NF) for efficient and stable HER in alkaline medium. The two-step method can creates high density of ultra-thin porous Ni2P nanosheets firmly rooted into Ni foam substrate which can guarantee excellent electrical contacts, strong substrate adherence and large amount of active sites. Such a binder-free flexible HER cathode exhibits superior electrocatalytic performance with an overpotential of 134 mV at current density of 10 mA cm?2. It also shows superior stability at higher current densities of 100 and 500 mA cm?2 for at least 48 h and negligible performance degradation is observed. |
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| Keywords: | Nickel phosphide In-situ synthesis Porous nanosheets Hydrogen evolution reaction Electrocatalysis |
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