Ultrafine FeCu Alloy Nanoparticles Magnetically Immobilized in Amine-Rich Silica Spheres for Dehalogenation-Proof Hydrogenation of Nitroarenes

被引：31

作者：

Bao, Hongjie ^{[1
]}

Li, Yunong ^{[1
]}

Liu, Lei ^{[1
]}

Ai, Yongjian ^{[2
]}

Zhou, Junjie ^{[1
]}

Qi, Li ^{[1
]}

Jiang, Ruihang ^{[1
]}

Hu, Zenan ^{[1
]}

Wang, Jingting ^{[1
]}

Sun, Hongbin ^{[1
]}

Liang, Qionglin ^{[2
]}

机构：

[1] Northeastern Univ, Dept Chem, Shenyang 170819, Liaoning, Peoples R China

[2] Tsinghua Univ, Dept Chem, Minist Educ, Key Lab Bioorgan Phosphorus Chem & Chem Biol, Beijing 100084, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2018年 / 24卷 / 54期

基金：

中国国家自然科学基金;

关键词：

alloys; copper; heterogeneous catalysis; hydrogenation; iron; magnetic immobilization; CATALYTIC TRANSFER HYDROGENATION; AROMATIC NITRO-COMPOUNDS; SELECTIVE HYDROGENATION; CHEMOSELECTIVE HYDROGENATION; AMMONIA BORANE; PARA-CHLORONITROBENZENE; NITRO/NITRILE COMPOUNDS; O-CHLORONITROBENZENE; NICKEL NANOPARTICLES; CARBONYL-COMPOUNDS;

D O I：

10.1002/chem.201801942

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：14418 / 14424

页数：7

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