Construction of Co-decorated 3D nitrogen doped-carbon nanotube/Ti3C2Tx-MXene as efficient hydrogen evolution electrocatalyst |
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| Affiliation: | 1. School of Materials Science and Engineering, Shandong University of Technology, Xincunxi Road 266th, Zibo, 255000, China;2. School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Xiaolingwei 200th, Nanjing, 210094, China;1. Institute of Refrigeration and Cryogenic Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;2. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing, 100028, China;1. Department of Chemistry, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China;2. College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China;1. Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, College of Materials, Xiamen University, Xiamen 361005, PR China;2. Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen 361005, PR China;3. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, PR China;4. Institute of Materials Genome and Big Data, Harbin Institute of Technology, Shenzhen 518055, PR China;5. Shenzhen R&D Center for Al-based Hydrogen Hydrolysis Materials, Shenzhen 518055, PR China;1. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, PR China;2. Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, PR China;3. College of Chemistry, Taiyuan University of Technology, Taiyuan, Shanxi, 030024 PR China;4. National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, China;1. Department of Engineering, Loyola University Maryland, 4501 North Charles St, Baltimore, MD, 21210, USA;2. American Patent Institute, 2817 Wesleyan Drive, Churchville, MD, 21028, USA |
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| Abstract: | Rational design of transition metal catalysts with robust and durable electrocatalytic activity for hydrogen evolution reactions (HER) is extremely important for renewable energy conversion and storage, as well as water splitting. Heteroatom doping has emerged as a feasible strategy for enhancing electrocatalytic activity. Here, cobalt nanoparticles (Co-NPs) were coated with nitrogen-doped carbon nanotubes (NCNTs) prepared via an in situ growth on accordion-like Ti3C2Tx-MXene (Co-NCNT/Ti3C2Tx). Such an intriguing structure showed great features: abundant anchoring sites for NCNT in situ growth, intimate integration of Co-NPs and NCNTs, high-speed electron transfer between 1D NCNTs and 2D Ti3C2Tx-MXenes, and a large number of effective catalytic active sites. This Co-NCNT/Ti3C2Tx hybrid catalyst was demonstrated to possess excellent HER performance with low overpotential (η10, 190 mV), small Tafel slope (78.4 mV dec−1), large electrochemically active surface area, and good long-term stability, thus outperforming many reported electrocatalysts. The present strategy provided a facile route for the design of transition metal HER catalysts with NCNT and MXene. |
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| Keywords: | MXene Nitrogen doped carbon nanotube HER catalyst 3D porous framework |
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