Issue 6, 2017

Efficient chemoselective hydrogenation of halogenated nitrobenzenes over an easily prepared γ-Fe2O3-modified mesoporous carbon catalyst

Abstract

Efficient chemoselective hydrogenation of halogenated nitrobenzenes using low-cost catalysts is an important research area of applied catalysis. In this work, a Fe metal organic gel (Fe-MOG) was prepared via metal coordination interaction between Fe(NO3)3·9H2O and 1,4-naphthalenedicarboxylic acid. Fe-MOG was used as the precursor for the fabrication of a low-cost γ-Fe2O3-modified mesoporous carbon catalyst (γ-Fe2O3/MC) through carbonization under an N2 atmosphere at high temperature. The obtained γ-Fe2O3/MC catalyst had high catalytic activity and selectivity for the hydrogenation of Cl, Br and I functionalized nitrobenzenes without any obvious dehalogenation. The hydrogenation reactions had a product yield and selectivity for the corresponding halogenated aniline of 100% when using hydrazine hydrate as the reducing agent. The whole hydrogenation reaction process was environmentally friendly because of its harmless byproducts (H2O and N2). In addition, the γ-Fe2O3/MC catalyst was recyclable because of the magnetism of the γ-Fe2O3 active sites. The catalytic activity of the γ-Fe2O3/MC catalyst was not obviously decreased after being recycled five times. Therefore, the γ-Fe2O3/MC catalyst has great potential for future applications in the chemoselective hydrogenation of halogenated nitrobenzenes.

Graphical abstract: Efficient chemoselective hydrogenation of halogenated nitrobenzenes over an easily prepared γ-Fe2O3-modified mesoporous carbon catalyst

Supplementary files

Article information

Article type
Paper
Submitted
08 Dec 2016
Accepted
29 Jan 2017
First published
30 Jan 2017

Green Chem., 2017,19, 1548-1554

Efficient chemoselective hydrogenation of halogenated nitrobenzenes over an easily prepared γ-Fe2O3-modified mesoporous carbon catalyst

M. Tian, X. Cui, M. Yuan, J. Yang, J. Ma and Z. Dong, Green Chem., 2017, 19, 1548 DOI: 10.1039/C6GC03386E

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