第一作者：Rongxiu Guo

通讯作者：Xiaodong Li, Dun Niu, Hong-bin Sun

合写作者：Xinyue Zhang, Ze-Nan Hu, Hong Li, Jianyi Gao, Jiaping Wang, Qionglin Liang

发表刊物：Chemical Engineering Journal

卷号：425

影响因子：13.3

DOI码：10.1016/j.cej.2021.131417

所属单位：Department of Chemistry, Northeastern University

教研室：物理化学

刊物所在地：SWITZERLAND

摘要：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.

关键字：Benzonitrile, Selective transfer hydrogenation, Hollow PtCu nanoparticles, Nanoreactor, Nanocatalyst

论文编号：WOS:000707126000162

学科门类：理学

一级学科：化学

页面范围：131417

ISSN号：1385-8947

是否译文：否