First Author:Hongjie Bao

Correspondence Author:Hong-bin Sun,Qionglin Liang

Co author:Yunong Li, Lei Liu, Yongjian Ai, Junjie Zhou, Li Qi, Ruihang Jiang, Zenan Hu, Jingting Wang

Journal:Chemistry-A European Journal

Issue:54

Volume:24

Impact Factor:4.1

DOI number:10.1002/chem.201801942

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

Teaching and Research Group:物理化学

Place of Publication:GERMANY

Abstract:A novel core-shell structured nanocatalyst (Fe3O4@SiO2-NH2-FeCu nanoparticles) with ultrafine FeCu alloy NPs magnetically immobilized in porous silica has been fabricated. The obtained catalyst revealed excellent activity and chemoselectivity for catalyzing the hydrogenation of nitroarenes to corresponding anilines using hydrazine hydrate as the hydrogen source, and the reaction could be carried out smoothly in water, which is an environmentally friendly solvent. The FeCu alloy effectively prevented the dehalogenation of halonitroarenes, and X-ray photoelectron spectroscopy (XPS) study showed that it resulted from the electron-enrichment of Fe from Cu. A kinetics study indicated that the reaction order was about 1.5 towards 4-CNB and the apparent active energy (E-a) was 48.1 kJ mol(-1), which is a relatively low value. Furthermore, the FeCu NPs are magnetically immobilized in the silica spheres (Fe3O4@SiO2), therefore the catalyst can be easily recovered by use of an external magnet and also possesses a long life time.

Key Words:alloys; copper; heterogeneous catalysis; hydrogenation; iron; magnetic immobilization

Document Code:WOS:000445447400019

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:14418-14424

ISSN No.:0947-6539

Translation or Not:no