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Chemcial Industry and Engineering 2023, Vol. 40 Issue (6) :45-52    DOI: 10.13353/j.issn.1004.9533.20230141
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Hydrogenation of chlorinated nitrobenzene by Pd supported on monodispersed nitrogen-doped carbon nanospheres
YU Fang, ZU Rongyan, LYU Yunpeng, HAN Xinghua, WANG Zhipeng, LI Yu, SONG Jian
College of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, China

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Abstract The preparation of efficient Pd/C catalysts for selective hydrogenation of halogenated nitrobenzene to halogenated aniline is the key to get a breakthrough in this process. Here, supported Pd/CN-x(x represents the carbonization temperature of carbon-based support) catalysts were prepared via an impregnation method with monodispersed nitrogen-doped carbon nanospheres as the support and metallic palladium as the active component, and their catalytic performances for the hydrogenation of chlorinated nitrobenzene to chlorinated aniline were studied. The morphology, structure and surface chemical properties of obtained catalysts were characterized by Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction spectroscopy (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The effect of nitrogen-doped carbon support prepared at different temperatures on the activity and selectivity of selective hydrogenation of chloronitrobenzene for supported palladium catalysts were investigated. Experimental results revealed that the monodispersed nitrogen-doped carbon nanospheres as support could achieve uniform dispersion of Pd nanoparticles, and endow the obtained samples with excellent catalytic properties. In particular, the Pd/CN-600 catalyst exhibits 100% conversion of 3-chloronitrobenzene with a selectivity of 76.9% for 3-chloroaniline. In addition, it was indicated that the nitrogen-containing functional groups on the surface of the carbon nanospheres could influence the effective dispersion of the active Pd component and thus the selectivity of 3-chloroaniline.
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YU Fang
ZU Rongyan
LYU Yunpeng
HAN Xinghua
WANG Zhipeng
LI Yu
SONG Jian
Keywordsmonodispersed nitrogen-doped carbon nanospheres   catalytic hydrogenation   supported Pd catalysts   3-chloronitrobenzene   3-chloroaniline     
Received 2023-03-17;
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YU Fang, ZU Rongyan, LYU Yunpeng, HAN Xinghua, WANG Zhipeng, LI Yu, SONG Jian.Hydrogenation of chlorinated nitrobenzene by Pd supported on monodispersed nitrogen-doped carbon nanospheres[J]  Chemcial Industry and Engineering, 2023,V40(6): 45-52
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