First Author:Rongxiu Guo

Correspondence Author:Xiaodong Li, Dun Niu, Hong-bin Sun

Co author:Xinyue Zhang, Ze-Nan Hu, Hong Li, Jianyi Gao, Jiaping Wang, Qionglin Liang

Journal:Chemical Engineering Journal

Volume:425

Impact Factor:13.3

DOI number:10.1016/j.cej.2021.131417

Affiliation of Author(s):Department of Chemistry, Northeastern University

Teaching and Research Group:物理化学

Place of Publication:SWITZERLAND

Abstract:Hollow metal nanoparticles have attracted great interest in heterogeneous catalysis research due to their unique structures as nanoreactors. Here, we report hollow PtCu nanoparticles encapsulated in microporous silica shells (H-PtCu@SiO2), which can serve as the nanoreactor with high catalytic activity and high stability. The H-PtCu@SiO2 nanoreactor shows the state-of-the-art catalytic performance for the transfer hydrogenation of benzonitrile to dibenzylamine, which achieves up to 100% conversion and 99% selectivity in only 0.5 h. The void-confinement effect of H-PtCu@SiO2 is crucial for the outstanding catalytic performance by encaging the reactants in the nanoreactor. The computation demonstrates the limiting diffusion effect of the silica shell toward the ammonia borane, thus reduces the concentration of reductant species and prolongs the lifetime of the intermediate imine to improve the selectivity of secondary amine. Moreover, the silica shells can effectively enhance the catalytic stability of the H-PtCu@SiO2 nanoreactor.

Key Words:Benzonitrile, Selective transfer hydrogenation, Hollow PtCu nanoparticles, Nanoreactor, Nanocatalyst

Document Code:WOS:000707126000162

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:131417

ISSN No.:1385-8947

Translation or Not:no