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A novel Ce_(0.485)Zr_(0.485)Y_(0.03)O_(2) composite oxide with surface doping of Y and its application in Pd-only three-way catalyst

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Rare Metals 2024年第2期43卷 749-757页

作者： Zheng Zhao Wei-Xin Zhao Yong-Qi Zhang Mei-Sheng Cui Yong-Ke Hou Dong-Ming Chen Juan-Yu Yang Zong-Yu Feng Xiao-Wei Huang National Engineering Research Center for Rare Earth Grirem Advanced Materials Co.Ltd.GRINM Group Corporation LimitedBeijing100088China Griem Hi-Tech Co.Ltd. Langfang065000China Rare Earth Functional Materials(Xiong’an)Innovation Venter Co.Ltd. Baoding071700China

The ceria-zirconia compound oxide-supported noble metal Pd(Pd@CZ)is widely used in three-way ***,the surface structure of CZ plays an important role in catalytic activity of ***,how to regulate the surface structure of CZ and clarify the structure–activity relationship is still a *** this paper,a strategy is proposed to develop high activity Pd@CZ nanocatalysts by tuning Y doping sites in *** precipitate-deposition method is developed to prepare the novel Ce_(0.485)Zr_(0.485)Y_(0.03)O_(2) composite with surface doping of Y(CZ-Y-S).In addition,the Pd@CZ-Y-S(Pd supported on CZ-Y-S)exhibits superior catalytic activity for HC,CO,and NO oxide,wherein,for CO and C_(3)H_(6) oxidation,the low-temperature activity of Pd@CZ-Y-S is still 20%higher than that of Pd@CZ-Y-B(Y bulk doping)and commercial Pd@CZ after 1000℃/4 h *** effect mechanism is further studied by density functional theory(DFT)*** with Pd@CZ-Y-B,Pd@CZ-Y-S shows the lower CO oxide reaction energy barriers due to the weaker adsorption strength of *** Y surface doping strategy could provide valuable insights for the development of highly efficient Pd@CZ catalyst with extensive applications.

关键词： Rare earth Ceria-zirconia-supported Pd Surface doping Experiment and theory catalytic application

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TiO_(2)-supported Single-atom Catalysts:Synthesis,Structure,and application

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Chemical Research in Chinese Universities 2022年第5期38卷 1123-1138页

作者： LIU Zailun SUN Like ZHANG Qitao TENG Zhenyuan SUN Hongli SU Chenliang International Collaboration Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060P.R.China Department of Applied Chemistry Faculty of EngineeringKyushu Institute of TechnologyKitakyushu 804-8550Japan

In recent years,single-atom catalysts(SACs)have attracted increasing attention in ***,their stability is considerably *** a result,fine-tuning the interaction of metal single atoms(SA)with different types of supports has emerged as an effective strategy for improving their thermal and chemical *** to its non-toxicity,cost-effectiveness,high abundance,and excellent stability,as well as presence of rich,tunable,and reliable anchor sites for metal SA,TiO_(2)has been extensively explored as a superior support for *** this review,recent advances of TiO_(2)-supported SACs(M1/TiO_(2))are discussed,and synthetic strategies,structure elucidation,and catalytic applications are ***,the recently developed synthetic strategies for M1/TiO_(2)arehighlighted and summarized,identifying the major challenges for the precise fabrication of M1/TiO_(2).Subsequently,key characterization techniques for the structure identification of M1/TiO_(2)are ***,catalytic applications of M1/TiO_(2)are highlighted,***,electrocatalysis,and *** addition,the mechanism via geometric structures and electronic states of metal centers facilitate catalytic reactions is ***,opportunities and challenges of M1/TiO_(2)in catalysis are discussed,which may inspire the future development of M1/TiO_(2)for multifunctional catalytic applications.

关键词： Single-atom catalyst TiO_(2)support Synthetic strategy Characterization catalytic application

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Mechanistic understanding of Cu-based bimetallic catalysts

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Frontiers of Chemical Science and Engineering 2020年第5期14卷 689-748页

作者： You Han Yulian Wang Tengzhou Ma Wei Li Jinli Zhang Minhua Zhang School of Chemical Enginering and Technology Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Membrane Science and Desalination Technology Tianjin UniversityTianjin 300072China School of Chemistry and Chemical Engineering Shihezi UniversityShihezi 832003China Key Laboratory for Green Chemical Technology of Ministry of Education Research and Development Center for Petrochemical TechnologyTianjin UniversityTianjin 300072China

Copper has received extensive attention in the field of catalysis due to its rich natural reserves,low cost,and superior catalytic ***,we reviewed two modification mechanisms of co-catalyst on the coordination environment change of Cu-based catalysts:(1)change the electronic orbitals and geometric structure of Cu without any catalytic functions;(2)act as an additional active site with a certain catalytic function,as well as their catalytic mechanism in major reactions,including the hydrogenation to alcohols,dehydrogenation of alcohols,water gas shift reaction,reduction of nitrogenous compounds,electrocatalysis and *** influencing mechanisms of different types of auxiliary metals on the structure-activity relationship of Cu-based catalysts in these reactions were especially summarized and *** mechanistic understanding can provide significant guidance for the design and controllable synthesis of novel Cu-based catalysts used in many industrial reactions.

关键词： copper bimetallic catalyst coordination modification mechanism catalytic application

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