Encapsulation of ultrafine Pd nanoparticles within the shallow layers of UiO-67 for highly efficient hydrogenation reactions

作     者：Zhiming Cui Ting Fan Liyu Chen Ruiqi Fang Chuanmao Li Yingwei Li Zhiming Cui;Ting Fan;Liyu Chen;Ruiqi Fang;Chuanmao Li;Yingwei Li

作者机构：State Key Laboratory of Pulp and Paper EngineeringSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China Guangzhou Keneng Cosmetics Scientific Research Co.Lid.Guangzhou 510800China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2021年第64卷第1期

页      面：109-115页

核心收录：

学科分类：081705[工学-工业催化] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(21825802,21908068) the Fundamental Research Funds for the Central Universities(2019PY11,2019MS041) the Science and Technology Program of Guangzhou(201804020009) the State Key Laboratory of Pulp and Paper Engineering(2017ZD04,2018TS03) the Natural Science Foundation of Guangdong Province(2016A050502004,2017A030312005,2020A1515010376) 

主　　题：Metal-organic frameworks metal nanoparticles heterogeneous catalysis encapsulation hydrogenation 

摘      要：Metal-organic frameworks(MOFs)have been used to encapsulate active metal nanoparticles(MNPs)to fabricate MNPs@MOFs composites with high catalytic ***,the diffusion of reactants and the accessibility of MNPs located in the center of MOFs may be hindered due to the inherent microporous structures of MOFs,which would affect the catalytic activities of ***,we report a solvent assisted ligand exchange-hydrogen reduction(SALE-HR)strategy to selectively encapsulate ultrafine MNPs(Pd or Pt)within the shallow layers of a MOF,i.e.,*** particle sizes of the encapsulated MNPs and the thickness of the MNPs-embedded layers can be adjusted easily by controlling the SALE conditions(*** and temperature).Crucially,the LE-Pd@UiO-80-0.5 composite with the thinnest Pd-embedded layers displays remarkable catalytic efficiency with a high turnover frequency(TOF)value of 600 h^-1towards hydrogenation of nitrobenzene under 1 atm H_2at room *** results indicate that the catalytic efficiency and the utilization of MNPs can be enhanced by compactly encapsulating MNPs within the shallow layers of MOFs as close to their outer surfaces as possible,owing to the short masstransfer distance and enhanced accessibility of overall MNPs.