CO oxidation over the Cu2O/CuO hollow sphere heterojunction catalysts with enhanced low-temperature activities |
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| Affiliation: | 1. Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, 210044, Nanjing, PR China;2. College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, PR China;3. Jiangsu ShuangLiang Environmental Technology Co., Ltd., Jiangyin, 214400, PR China;4. Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, PR China;5. State Environmental Protection Key Laboratory of Atmospheric Physical Modeling and Pollution Control, China Energy Science and Technology Research Institute Co. Ltd., Nanjing 210023, China;6. School of Material Science and Engineering, University of Jinan, Jinan, 250022, PR China;1. Nikolaev Institute of Inorganic Chemistry SB RAS, 3, Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia;2. Boreskov Institute of Catalysis SB RAS, 5, Pr. Lavrentieva, Novosibirsk, 630090, Russia;3. Novosibirsk State University, Pirogova St., 2, Novosibirsk, 630090, Russia;4. Novosibirsk State Technical University, Karl Marx Pr., 20, Novosibirsk, 630073, Russia;1. State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China;2. School of Mechanical Engineering and Automation, Fuzhou University, China;3. Fujian Provincial Collaborative Innovation Centre of High-End Equipment Manufacturing, Fuzhou, China;1. Instituto de Tecnologías Del Hidrógeno y Energías Sostenibles (UBA-CONICET), Facultad de Ingeniería Química-Universidad de Buenos Aires, Pabellón de Industrias, Intendente Güiraldes 1428, Ciudad Universitaria, Ciudad Autónoma de Buenos Aires, Argentina;2. Departamento de Ingeniería Química, Facultad de Ciencias, Campus de Teatinos, Universidad de Málaga, Málaga, E-29071, Spain;3. Departamento de Computación, Facultad de Ciencias Exactas y Naturales - Universidad de Buenos Aires, Pabellón 1, Intendente Güiraldes 1428, Ciudad Universitaria, Ciudad Autónoma de Buenos Aires, Argentina;1. Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China;2. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, 610207, China;1. Department of Chemistry, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, PR China;2. Department of Life and Health Sciences, Huzhou College, 313000, Huzhou, China;3. School of Engineering, Huzhou University, 759 East Erhuan Road, Huzhou 313000, PR China;4. Zhejiang Huayuan Pigment Co., Ltd, Deqing 310024, Zhejiang, PR China |
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| Abstract: | In this work, a series of the Cu2O/CuO hollow sphere heterojunction catalysts with various Cu+/Cu2+ ratios were designed and synthesized to improve the low-temperature catalytic activity of CO oxidation. The physicochemical properties of all the catalysts were characterized by the SEM, TGA, N2-physisorption, XRD, FT-IR, XPS, and H2-TPR. The results revealed that the Cu2O hollow sphere catalyst had the large specific surface area due to the formation of the hollow structure, which could provid more accessible active sites for the gaseous reactants. Meanwhile, the Cu2O/CuO hollow sphere heterojunction catalysts possessed high concentration of the surface oxygen vacancies and further promoted the adsorption and activation of O2. As a result, the apparent activation energy of the CO oxidation was decreased and thus low-temperature activity of the CO oxidation was finally promoted. Therefore, the Cu2O/CuO hollow sphere heterojunction catalysts were considered as a series of high-efficient catalyst candidates for CO oxidation with promising low-temperature performance. |
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| Keywords: | Oxygen vacancy Hollow sphere CO oxidation Low-temperature activity |
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