Regulation of the selective hydrogenation performance of sulfur-doped carbon-supported palladium on chloronitrobenzene  

作　　者：Qunfeng Zhang Bingcheng Li Yuan Zhou Deshuo Zhang Chunshan Lu Feng Feng Jinghui Lv Qingtao Wang Xiaonian Li 

机构地区：[1]Institute of Industrial Catalysis of Zhejiang University of Technology,State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology,Hangzhou 310014,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第6期69-75,共7页中国化学工程学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(22078292,22008212,U20A20119,21776258)。

摘　　要：The overall performance of metal catalysts can be efficiently adjusted by modifying carbon carriers with different valence sulfur precursors.The wet impregnation technique successfully prepared carbon material carriers doped with varying sources of sulfur(Na_(2)SO_(4),NaHSO_(3),Na_(2)S·9H_(2)O).Palladium carbon catalysts doped with different sulfur precursors had been prepared with the aid of the liquid-phase reduction method of the selective hydrogenation of o-chloronitrobenzene(o-CNB)to o-chloroaniline(o-CAN).The catalyst prepared for Na_(2)S·9H_(2)O as a precursor has excellent performance,and the selectivity for o-CAN is more than 99.9%at 100%conversion.In addition,the characterization results show that with the decrease of S valence,the electronic effect between S and Pd increases,and the outer electron shift of Pd increases,which reduces the adsorption and dissociation ability of Pd to hydrogen,resulting in excellent selectivity.The effects provided a good idea for the hydrogenation of o-CNB and a different point of view on sulfur doping in a variety of hydrogenation reactions.

关 键 词：CATALYST HYDROGENATION SELECTIVITY Sulfur doping Electronic effect 

分 类 号：O643.36[理学—物理化学]