Highly dispersed Fe-decorated Ni nanoparticles prepared by atomic layer deposition for dry reforming of methane |
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| Affiliation: | 1. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei, 430074, PR China;2. State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei, 430074, PR China;3. Jiangxi Key Laboratory of Surface Engineering, School of Materials and Mechatronics, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi, 330038, PR China;1. Federal Institute of Ceará, Maracanaú, 61939140, Brazil;2. Federal University of Ceará, Fortaleza, 60440-900, Brazil;1. School of Integrated Circuits, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China;2. School of Information and Intelligent Engineering, Guangzhou Xinhua University, Dongguan, 523133, Guangdong, China;1. Key Laboratory of Catalysis Science and Technology of Chongqing Education Commission, Department of Chemical Engineering, Chongqing Technology and Business University, Chongqing 400067, China;2. Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing 400067, China;1. Centre of Hydrogen Energy, Institute of Future Energy, 81310 UTM, Johor Bahru, Johor, Malaysia;2. Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia;3. Department D’Enginyeria Qu´?mica, Universitat Rovira I Virgili, Av Pä?sos Catalans 26, 43007, Tarragona, Spain;4. Department of Chemistry, Sokoto State University, PMB 2134, Airport Road, Sokoto, Nigeria;5. Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Chile;6. Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia |
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| Abstract: | Dry reforming of methane (DRM) is a sustainable chemical process that can simultaneously transform methane and carbon dioxide, which are generally considered greenhouse gases, into syngas with H2/CO ratio close to 1. The deposition of carbon on the active sites during long-period DRM tests will lead to severe deactivation of Ni-based catalysts. Thus, in this work, we proposed a series of uniformly dispersed Fe-decorated Ni/Al2O3 catalysts via atomic layer deposition (ALD) to solve this key issue. Modification with trace amounts of Fe (0.3–0.6%) had multiple effects on facilitating the CH4 dissociation on Ni0, improving the low-temperature catalytic activity, moderating the carbon species and accelerating coke oxidation. The sample denoted as 0.3%Fe/Ni/Al2O3 exhibited almost no activity loss in the 72 h test at 650 °C. The Fe-decorated Ni/Al2O3 structure achieved a balance between the enhancement of CH4 cracking and the elimination of coke. Furthermore, this advanced ALD approach of preparing uniform secondary metal nanoparticle-decorated catalysts provided guidance to other bimetallic systems, such as Pt/Ni, Mn/Ni, and Cu/Ni. |
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| Keywords: | Dry reforming of methane Fe-decorated structure Atomic layer deposition Activity improvement Carbon resistance |
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