Enhanced water-gas shift reaction performance of MOF-derived Cu/CeO2 catalysts for hydrogen purification |
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| Affiliation: | 1. Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, RMIT University, GPO BOX 2476, Melbourne, VIC, 3001, Australia;2. Chemical Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH, 45221-0012, United States;3. Department of Chemistry, Osmania University, Hyderabad, 500 007, India;4. Laboratory of Advanced Catalysis for Sustainability, School of Chemistry, University of Sydney, Sydney, NSW, 2006 Australia;5. Department of Chemistry and Materials Center for Sustainable Energy & Environment, Birla Institute of Technology & Science (BITS) Pilani, Hyderabad Campus, Hyderabad, 500 078, India;1. Liaoning Provincial Engineering Research Centre for Advanced Coking and Coal Utilization, University of Science and Technology Liaoning, Anshan 114051, China;2. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China;3. School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China;1. Institute of Clean Energy Chemistry, College of Chemistry, Liaoning University, Shenyang 110036, China;2. CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, 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;1. São Carlos Federal University (UFSCar), Chemical Engineering Department (DEQ), Rod. Washington Luiz, km 235 – SP 310, CEP 13565-905, São Carlos, SP, Brazil;2. São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), Av. Trabalhador São-Carlense 400, CEP 13566-590, São Carlos, SP, Brazil;1. Department of Environmental and Chemical Engineering, Eco-friendly Offshore Plant FEED Engineering Course, Changwon National University, Republic of Korea;2. Department of Environment and Energy Engineering, Kyungnam University, Republic of Korea;3. School of Civil, Environmental and Chemical Engineering, Changwon National University, Republic of Korea |
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| Abstract: | The water-gas shift (WGS) reaction has received renewed interest because it is one of the key reactions for producing hydrogen and renewable energy in contemporary technologies like fuel cells and bio-refineries. Catalysts play an important role in WGS reaction for achieving high CO conversion and hydrogen generation activity. Thus, the performance and stability of catalysts are vital for the WGS reaction. In the present work, the CuCe metal-organic framework (MOF) is used as a template to derive the nanostructured Cu/CeO2 catalyst. The influence of CuCe-MOF templated approach on the WGS activity of Cu/CeO2 has been established. Different Cu doping levels had a significant impact on WGS activity. Amongst, the Ce0.8Cu0.2O2 (Cu2Ce) catalyst had a highest CO conversion (96%). The long-term stability tests further prove that the Cu2Ce catalyst had maintained high CO conversion over 100 h reaction time. XRD and TEM results suggest that different loadings of Cu content have a distinct impact on the dispersion of Cu and the catalytic properties. N2O chemisorption results suggest that 20 wt.% of Cu loading resulted in high Cu dispersion (52%) compared to other loadings. The H2-temperature programmed reduction (TPR) revealed that the superior catalytic activity of Cu2Ce catalyst could be attributed to the strong reducibility (i.e. lower redox temperature) derived from CuCe-MOF template. It further suggests well-dispersed copper oxide species at low Cu loadings and crystalline copper oxide species at high Cu loadings. This work emphasizes the significance of Cu/CeO2 catalysts with exceptional catalytic activity and stability for the WGS process with MOF-precursor. |
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| Keywords: | Metal-organic framework Water-gas shift reaction CO conversion Cu doping |
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