文献类型：期刊文献

英文题名：Coating PtRh alloy nanoparticles with mesoporous silica for the hydrogenation of toluene to methylcyclohexane

作者：Hu, Ru[1];Li, Jiajuan[1];Zhang, Hang[1];Liu, Dong[1];Zhou, Shenghu[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：135

期号：4

起止页码：1945

外文期刊名：REACTION KINETICS MECHANISMS AND CATALYSIS

收录：;EI(收录号：20222612299487);WOS:【SCI-EXPANDED(收录号:WOS:000817843700002)】；

基金：This work is financially supported by the National Natural Science Foundation of China (Grant Nos. 22078099 and 21776090). Additional support was provided by Feringa Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：Core-shell; Synergistic effect; Bimetallic; Nanocatalysis; Hydrogenation

摘要：In this work, PtRh@mSiO(2) mesoporous core-shell nanoparticles were successfully prepared by a sol-gel method and their catalytic properties for hydrogenation of toluene to methylcyclohexane was investigated. The PtRh alloy nanoparticles were synthesized by co-reduction of Pt and Rh precursors with NaBH4 in the presence of tetradecyltrimethylammonum bromide, and further coated by SiO2 through the hydrolysis and condensation polymerization of tetraethylorthosilicate. The following calcination and H-2 reduction give PtRh@mSiO(2) mesoporous core-shell nanocatalysts, which features similar to 5 nm PtRh alloy nanoparticles coated with similar to 10 nm mesoporous silica shells confirmed by a series of characterization techniques. Compared with the control individual Pt@mSiO(2) and Rh@mSiO(2), Pt1Rh1@mSiO(2) exhibits better catalytic performance for hydrogenation of toluene to methylcyclohexane. The mesoporous silica shells in PtRh@mSiO(2) prevent the agglomeration and sintering of inner PtRh nanoparticles while allowing the mass transfer for catalytic reactions, and the performance enhancement could be attributed to the synergistic effect between Pt and Rh.