首页|Strong metal-support interactions between highly dispersed Cu+species and ceria via mix-MOF pyrolysis toward promoted water-gas shift reaction
Strong metal-support interactions between highly dispersed Cu+species and ceria via mix-MOF pyrolysis toward promoted water-gas shift reaction
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The modulation of metal-support interfacial interaction is significant but challenging in the design of high-efficiency and high-stability supported catalysts.Here,we report a synthetic strategy to upgrade Cu-CeO2 interfacial interaction by the pyrolysis of mixed metal-organic framework(MOF)structure.The obtained highly dispersed Cu/CeO2-MOF catalyst via this strategy was used to catalyze water-gas shift reaction(WGSR),which exhibited high activity of 40.5 μmolco g-1cat. s-1 at 300 ℃ and high stability of about 120 h.Based on comprehensive studies of electronic structure,pyrolysis strategy has significant effect on enhancing metal-support interaction and then stabilizing interfacial Cu+species under reaction conditions.Abundant Cu+species and generated oxygen vacancies over Cu/CeO2-MOF catalyst played a key role in CO molecule activation and H2O molecule dissociation,respectively.Both collaborated closely and then promoted WGSR catalytic performance in comparison with traditional supported catalysts.This study shall offer a robust approach to harvest highly dispersed catalysts with finely-tuned metal-support interactions for stabilizing the most interfacial active metal species in diverse heterogeneous catalytic reactions.
Beijing National Laboratory for Molecular Sciences(BNLMS),State Key Laboratory of Rare Earth Materials Chemistry and Applications,PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China
Beijing National Laboratory for Molecular Sciences(BNLMS),College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China
Beijing National Laboratory for Molecular Sciences(BNLMS),State Key Laboratory for Structural Chemistry of Stable and Unstable Species,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China
国家重点研发计划国家自然科学基金国家自然科学基金Beijing National Laboratory for Molecular Sciences
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