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Citation: XU Xing-Zhong, YANG Jian-Feng, LI Xiao-Nian, YAN Xin-Huan. Hydrogenation of o-chloronitrobenzene over CNTs Supported Pt Catalyst Obtained by Laser Vaporization of Bulk Metal[J]. Acta Physico-Chimica Sinica, ;2008, 24(01): 121-126. doi: 10.3866/PKU.WHXB20080121 shu

Hydrogenation of o-chloronitrobenzene over CNTs Supported Pt Catalyst Obtained by Laser Vaporization of Bulk Metal

1.
State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China

Received Date: 18 June 2007
Available Online: 10 October 2007

Pt nano clusters were produced by the laser vaporization of bulk metal and were deposited on the surface of carbon nanotubes (CNTs) to produce carbon nanotubes supported Pt catalyst (Pt/CNTs). Transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS) showed that Pt nanoparticles had a narrow size distribution and the Pt content was connected with the preparation condition. X-ray diffraction (XRD) analysis showed that the Pt/CNTs had crystalloid structure which related to the catalytic performance. X-ray photoelectron spectroscopy (XPS) was used to measure core level binding energy shifts of Pt 4f7/2 and Pt 4f5/2. Its catalytic performance was evaluated by liquid-phase hydrogenation of o-chloronitrobenzene (o-CNB). The results showed that the Pt/CNTs catalyst exhibited higher conversion and selectivity. The most favorable preparation condition was obtained as follows: T=25 ℃, V=250 V, and p=300 Pa. It was found that the highest conversion of o-chloronitrobenzene could reach 99.7% while the selectivity to o-chloroaniline could reach 98.2% in alcohol at 60 ℃ under 1.0 MPa of hydrogen, showing od potential application.
- Platinum; Laser vaporization; Carbon nanotube; Hydrogenation; o-chloronitrobenzene
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