Graphene oxide decorated nickel-cobalt nanosheet structures based on carbonized wood for electrocatalytic hydrogen evolution |
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| Affiliation: | 1. Institute of Biomass Engineering, South China Agricultural University, Guangzhou 510642, China;2. Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China;1. Laboratory of Environmental Process Engineering, Department of Chemical Engineering, Faculty of Process Engineering, University Constantine 3 Salah Boubnider, P.O. Box 72, 25000 Constantine, Algeria;2. Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, 11421 Riyadh, Saudi Arabia;3. National Institute of Advanced Industrial Science and Technology (AIST), 4-205 Sakurazaka, Moriyama-ku, Nagoya 463-8560, Japan;4. School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia;1. College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi''an, Shaanxi, 710021, China;2. Shaanxi Key Laboratory of Industrial Automation, Shaanxi University of Technology, Hanzhong, Shaanxi, 723001, China;1. Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria;2. Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria;3. Department of Chemistry, Centre for Catalysis, University of Florida, Gainesville, USA;4. School of Chemistry, University of St. Andrews, Scotland, UK;1. GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China;2. GRINM Group Co., Ltd., National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy, Beijing 100088, China;3. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China;4. State Key Laboratory of Advanced Special Steels & Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China |
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| Abstract: | Nickel-based materials exhibit great potential in the field of hydrogen evolution reaction (HER), however, the low catalytic active site and poor corrosion resistance still limit further application. Herein, a novel 3D self-supporting electrode of graphene oxide/nickel-cobalt/carbonized wood (GO/Ni–Co/CW) based on porous carbon is developed. The self-supporting structure of the electrode effectively prevents the shedding of catalytic materials, while the exposed active sites of the Ni–Co nanosheets ensure excellent catalysis and the decoration of GO further enhances the HER performance. Evidently, GO/Ni–Co/CW requires an overpotential of 52 mV in 0.5 M H2SO4 and 70 mV in 1 M KOH to achieve a current density of 10 mA cm?2. Furthermore, the introduction of GO greatly improves the stability performance of the electrode due to its corrosion resistance, as found by the catalytic stability performance test. As a new idea, GO decorated Ni–Co nanosheets grown on wood-based porous carbon as electrodes fully combine and exploit the advantages of CW's 3D porous structure, Ni–Co nanosheets' catalytic activity, and GO's corrosion resistance, which provide an effective strategy for novel nickel-based HER electrocatalysts. |
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| Keywords: | Electrodeposition Hydrogen evolution reaction Electrocatalysis Nickel-cobalt binary nanosheets Graphene oxide |
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