First Author:Haimeng Tian

Correspondence Author:Hong-Bin Sun, Qionglin Liang

Co author:Junjie Zhou, Yunong Li, Yiming Wang, Lei Liu, Yongjian Ai, Ze-Nan Hu, Jifan Li, Rongxiu Guo, Zhibo Liu

Journal:Chemcatchem

Issue:22

Volume:11

Impact Factor:3.8

DOI number:10.1002/cctc.201901491

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

Teaching and Research Group:物理化学

Place of Publication:GERMANY

Abstract:Modifying the surface of metal catalyst is a crucial subject for improving the heterogeneous metal catalysts. It is still a great challenge to understand the structure-activity relationship (SAR) between the surface supporting groups and the metal particles. Herein, Rh NPs supported on the magnetic silica sphere with various functional groups (-NH2, -SH, -SO3H, -N=CH2, -Cl, -NHCOCH3 and -NHCH2Ph) have been prepared for catalytic hydrogenation of nitroarenes under atmospheric pressure at room temperature. We discover that the chemical state of Rh NPs depends on the supporting groups significantly. The electron-donating functionalities can effectively elevate the Rh-0/Rh3+ ratio, which increase the catalytic performance both in conversion and selectivity. The amino group decorated catalyst has such a good selectivity that no dechlorination reaction is observable in the hydrogenation of 2-chloro-3-nitropyridine. What's more, by introducing magnetic Fe3O4 nuclei and mesoporous silica encapsulating layer, the catalyst can be recovered conveniently by an external magnet, and can be reused 10 cycles without any loss of activity.

Key Words:Electron density Functional groups Rh nanoparticles Atmospheric hydrogen Catalytic hydrogenation

Document Code:WOS:000490012300001

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:5543-5552

ISSN No.:1867-3880

Translation or Not:no