UV Light-Assisted Synthesis of Highly Efficient Pd-Based Catalyst over NiO for Hydrogenation of o-Chloronitrobenzene

Weidong Jiang; Bin Xu; Guangyin Fan; Kaiming Zhang; Zhen Xiang; Xiaoqiang Liu

doi:10.3390/nano8040240

UV Light-Assisted Synthesis of Highly Efficient Pd-Based Catalyst over NiO for Hydrogenation of o-Chloronitrobenzene

Nanomaterials (Basel). 2018 Apr 14;8(4):240. doi: 10.3390/nano8040240.

Authors

Weidong Jiang^{1

2}, Bin Xu^{3

4}, Guangyin Fan⁵, Kaiming Zhang^{6

7}, Zhen Xiang^{8

9}, Xiaoqiang Liu^{10

11}

Affiliations

¹ School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China. jwdxb@suse.edu.cn.
² Key Laboratory of Green Catalysis of Sichuan Institute of High Education, Sichuan University of Science & Engineering, Zigong 643000, China. jwdxb@suse.edu.cn.
³ School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China. xbjwd@suse.edu.cn.
⁴ Key Laboratory of Green Catalysis of Sichuan Institute of High Education, Sichuan University of Science & Engineering, Zigong 643000, China. xbjwd@suse.edu.cn.
⁵ College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China. fanguangyin@cwnu.edu.cn.
⁶ School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China. kmzhang@suse.edu.cn.
⁷ Key Laboratory of Green Catalysis of Sichuan Institute of High Education, Sichuan University of Science & Engineering, Zigong 643000, China. kmzhang@suse.edu.cn.
⁸ School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China. zxiang@suse.edu.cn.
⁹ Key Laboratory of Green Catalysis of Sichuan Institute of High Education, Sichuan University of Science & Engineering, Zigong 643000, China. zxiang@suse.edu.cn.
¹⁰ School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China. xqliu@suse.edu.cn.
¹¹ Key Laboratory of Green Catalysis of Sichuan Institute of High Education, Sichuan University of Science & Engineering, Zigong 643000, China. xqliu@suse.edu.cn.

Abstract

Supported Pd-based catalyst over active nickel oxide (NiO) was repared using the impregnation method companying with UV-light irradiation. Moreover, the catalytic performance of the obtained Pd-based catalysts was evaluated towards the hydrogenation of o-chloronitrobenzene (o-CNB). Observations indicate that the as-prepared UV-irradiated Pd/NiO catalyst with a mole fraction 0.2% (0.2%Pd/NiO) has higher activity and selectivity in the o-CNB hydrogenation. Especially, UV-light irradiation played a positive role in the improvement of catalytic activity of 0.2%Pd/NiO catalyst, exhibiting an excess 11-fold activity superiority in contrast with non-UV-irradiated 0.2%Pd/NiO catalyst. In addition, it was investigated that effects of varied factors (i.e., reaction time, temperature, o-CNB/Pd ratio, Pd loading, hydrogen pressure) on the selective hydrogenation of ο-CNB catalyzed by UV-irradiated 0.2%Pd/NiO catalyst. Under the reaction conditions of 60 °C, 0.5 h, 1 MPa H₂ pressure, 100% conversion of o-CNB, and 81.1% o-CAN selectivity were obtained, even at high molar ratio (8000:1) of o-CNB to Pd.

Keywords: Pd/NiO catalyst; UV-light irradiation; hydrogenation; o-chloronitrobenzene.