Selective Hydrogenation of p-Chloronitrobenzene Catalyzed by Activated Carbon Supported Fe-Pt Bimetallic Catalyst

doi:10.11944/j.issn.1000-0518.2015.10.150083

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (10): 1164-1169.DOI: 10.11944/j.issn.1000-0518.2015.10.150083

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Selective Hydrogenation of p-Chloronitrobenzene Catalyzed by Activated Carbon Supported Fe-Pt Bimetallic Catalyst

GU Mu^a,HE Daiping^a^b^*(),JIANG Ping^a,YIN Xingchun^a,CHEN Hu^a

^aCollege of Chemistry
^bChongqing Key Laboratory of Photoelectric Functional Materials,College of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 400047,China

Received:2015-03-09 Accepted:2015-06-01 Published:2015-10-10 Online:2015-10-10
Contact: HE Daiping
Supported by:
Supported by the Foundation and Cutting-edge Research Plan of Chongqing(No.cstc2013jcyjA50006), Scientific and Technological Research Program of Chongqing Municipal Education Commission(No.KJ110621), Key Fund of Chongqing Normal University(No.10XLR021, No.11XB009)

Abstract

Abstract:

An activated carbon supported Pt-Fe bimetallic catalyst (Pt-Fe/AC) was prepared by impregnation reduction method, and its catalytic performance for selective hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline (p-CAN) was investigated. Compared with Pt/AC catalyst, the Pt-Fe/AC catalyst exhibited higher activity and excellent inhibition of dechlorination. One hundred percent selectivity towards p-CAN at complete conversion of p-CNB was achieved under the following conditions: 30 ℃ for 150 min, 1.0 MPa H₂, ethanol as solvent, and 0.02g Pt_0.003-Fe_0.04/AC catalyst(the lower case numbers represent the mass fraction of related metal in the catalyst) per gram p-CNB. The high selectivity towards p-CAN remained even at high temperature and H₂ pressure. The as-prepared catalysts were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The results show that Pt and Fe are well dispersed on the AC surface. The higher activity and excellent selectivity of the Pt_0.003-Fe_0.04/AC are primarily derived from the electron-deficient state of Pt due to the electronic effect of Pt nanoparticles with Fe, which weakened the extent of electron feedback from Pt particles to the aromatic ring of p-CAN and suppressed the hydrodechlorination of p-CAN.

Key words: selective hydrogenation, activated carbon, platinum iron bimetal, chloronitrobenzene, chloroaniline

CLC Number:

GU Mu, HE Daiping, JIANG Ping, YIN Xingchun, CHEN Hu. Selective Hydrogenation of p-Chloronitrobenzene Catalyzed by Activated Carbon Supported Fe-Pt Bimetallic Catalyst[J]. Chinese Journal of Applied Chemistry, 2015, 32(10): 1164-1169.

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Selective Hydrogenation of p-Chloronitrobenzene Catalyzed by Activated Carbon Supported Fe-Pt Bimetallic Catalyst

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