In situ construction of heterostructure NiSe–NiO nanoarrays with rich oxygen vacancy on MXene for efficient oxygen evolution |
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| Affiliation: | 1. Mechanical Engineering Department, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke QC, J1K 2R1, Canada;2. Institut de recherche sur l''hydrogène, Université du Québec à Trois-Rivières, Pavillon Tapan-K.-Bose, 3351, Boul. des Forges C.P.500, Trois-Rivières, QC, G9A 5H7, Canada;1. State Key Laboratory of Heavy Oil Processing, The Key Laboratory of Catalysis of CNPC, College of Chemical Engineering and Environment, China University of Petroleum, No. 18 Fuxue Road, Changping, Beijing, 102249, China;2. College of Sciences, China University of Petroleum, No. 18 Fuxue Road, Changping, Beijing, 102249, China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;3. Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Department of Materials Science, Fudan University, Shanghai 200433, China;1. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, PR China;2. Institute of Applied Physics, Jiangxi Academy of Sciences, Nanchang, 330029, PR China;1. School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou 510006, China;2. Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Guangdong University of Petrochemical Technology, Maoming 525000, China;3. Huangpu Hydrogen Innovation Center, Guangzhou University, Guangzhou 510006, China |
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| Abstract: | Developing high-efficiency, non-noble, earth-available electrocatalysts for the oxygen evolution reaction (OER) is vital for electrochemical energy conversion, but it is still challenging. Herein, we ingeniously designed a partial selenization method to construct NiSe–NiO heterostructure grown in situ on Ta4C3Tx MXene (denoted as NiSe–NiO/Ta4C3Tx MXene). NiSe–NiO/Ta4C3Tx MXene's plethora of heterointerfaces provides a wealth of active sites, fast charge and mass transfer, and favorable adsorption energies for OER intermediates, all of which contribute synergistically to the oxidation of alkaline water. As expected, taking advantage of the strong chemical and electron synergistic effects of NiSe and NiO, the synthesized NiSe–NiO/Ta4C3Tx MXene exhibits excellent activity for OER with a low overpotential of 255 mV at 10 mA cm−2, a small Tafel slope of 47.4 mV dec−1, as well as excellent long-term stability, exceeding that of its competitors. This study offers a novel synthetic route toward developing high-performance OER electrocatalysts for renewable energy conversion/storage systems and beyond by optimizing the catalysts' composition and architecture. |
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| Keywords: | Heterostructure NiSe–NiO nanoarrays Oxygen vacancy MXene Synergistic effect Oxygen evolution |
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