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Citation: 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. doi: 10.11944/j.issn.1000-0518.2015.10.150083 shu

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

1.
a College of Chemistry, Chongqing 400047, China;
2.
b Chongqing Key Laboratory of Photoelectric Functional Materials, College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 400047, China

Corresponding author: HE Daiping,
Received Date: 9 March 2015
Available Online: 24 April 2015
Fund Project: 重庆市基础与前沿研究计划(cstc2013jcyjA50006) (cstc2013jcyjA50006)重庆市教委科学技术研究项目(KJ110621) (KJ110621)重庆师范大学重点基金(12XLZ12,10XLR021)资助 (12XLZ12,10XLR021)

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 0.02 g 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.
- selective hydrogenation,
- activated carbon,
- platinum iron bimetal,
- chloronitrobenzene,
- chloroaniline
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