Aqueous substitution synthesis of platinum modified amorphous nickel hydroxide on nickel foam composite electrode for efficient and stable hydrogen evolution |
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| Affiliation: | 1. Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, PR China;2. Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, PR China;3. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, PR China;1. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China;2. Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China;3. National Institute of Metrology, Beijing 100013, China;4. Jiangsu Key Laboratory of Vehicle Emissions Control, Jiangsu 210093, China;1. Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Electrochemical Research Institute (CSIR-CECRI) Campus, New Delhi, India;2. Electrochemical Materials Science (ECMS) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi 630006, Tamil Nadu, India;3. Centre for Education (CFE), CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi 630006, Tamil Nadu, India;4. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA;5. Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA;1. Jiangsu Key Laboratory of New Power Batteries, Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China;2. Center for Genome Technology and Biomolecular Engineering, Department of Chemical Engineering, Columbia University, New York City, NY 10027, United States;3. Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, Shanxi 710119, China;4. Department of Chemistry and Institute of Materials Science, University of Connecticut, Storrs, CT 06269, United States |
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| Abstract: | Exploring highly active and stable electrocatalysts toward hydrogen evolution reaction (HER) is vital for the production of green energy and storage of intermittently renewable electrical energy. In this study, we fabricate Pt-modified Ni(OH)2 on 3D nickel foam (Pt content: 1.5 wt %) via a one-step galvanic replacement reaction in aqueous solution to achieve a top performance of HER under alkaline conditions. It exhibits a negligible onset potential, a Tafel slope of 17 mV dec?1, and overpotentials of 38, 114, and 203 mV to deliver 10, 50, and 100 mA cm?2 current densities, respectively, which outperforms the commercial Pt/C and Pt sheet. Moreover, this catalyst shows enhanced durability towards HER, sustaining electrolysis at ?20 mA cm?2 for 4, 500 min in 1 M KOH with little degradation. Its good performances come from the synergism of flake-like Pt and amorphous Ni(OH)2. This work provides not only a facile and easy scale-up approach to fabricate Pt?modified electrocatalysts with improved HER performance but also a new strategy to design self-supported high-performance hybrid materials of noble-metal and amorphous transitional metal hydroxides for sustainable energy conversion and storage. |
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| Keywords: | Galvanic replacement reaction Self-supported electrode Platinum Synergetic effects Energy conversion Hydrogen evolution reaction |
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