文献类型：期刊文献

英文题名：Modulated synthesis of cesium phosphomolybdate encapsulated in hierarchical porous UiO-66 for catalysing alkene epoxidation

作者：Hu, Dianwen[1,2];Miao, Songsong[3];Zhang, Pengfei[4];Wu, Siyuan[5];He, Yu-Peng[1,2];Meng, Qingwei[1,2]

机构：[1]Dalian Univ Technol, Ningbo Inst, Ningbo 315016, Peoples R China;[2]Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China;[3]Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China;[4]Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China;[5]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：13

期号：47

起止页码：33533

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20234915188176);WOS:【SCI-EXPANDED(收录号:WOS:001102200700001)】；

基金：Financial support from the Postdoctoral Research Foundation of Ningbo Institution of Dalian University of Technology (no. 03030001) is gratefully acknowledged.

语种：英文

外文关键词：Catalyst activity - Cesium - Epoxidation - Molybdenum compounds - Olefins - Synthesis (chemical)

摘要：The hybrid composite of cesium phosphomolybdate (CsPM) encapsulated in hierarchical porous UiO-66 (HP-UiO-66) was synthesized using a modulated solvothermal method. A variety of characterization results demonstrated that the pore size distribution of CsPM@HP-UiO-66 is broader than traditional microporous CsPM@UiO-66 and cesium phosphomolybdate clusters are uniformly distributed in the octahedral cages of HP-UiO-66. The catalytic properties of the hybrid composite were investigated in alkene epoxidation reaction with tert-butyl hydroperoxide (t-BuOOH) as an oxidant. CsPM@HP-UiO-66 showed much higher catalytic activity for the alkene epoxidation reaction in comparison with the reference catalysts and could be easily reused by centrifugation and recycled for at least ten runs without significant loss in catalytic activity. The superior catalytic activity and stability of the hybrid composite CsPM@HP-UiO-66 should be mainly attributed to the hierarchical pores in the support HP-UiO-66 promoting the diffusion of alkene molecules, the uniform distribution of highly active CsPM clusters in the octahedral cages of HP-UiO-66, the introduction of cesium cations to form the insoluble cesium phosphomolybdate and the strong metal-support interactions (SMSI) between the CsPM clusters and the HP-UiO-66 framework. Cesium phosphomolybdate encapsulated in HP-UiO-66 was successfully synthesized. The obtained materials showed superior catalytic performance in alkene epoxidation reaction, which was attributed to the well-designed CsPM@HP-UiO-66 composites.