Embedding Pd-Cu Alloy Nanoparticles in Shell of Surface-Porous N-Doped Carbon Nanosphere for Selective Hydrogenation of p-Chloronitrobenzene  

作　　者：Yingcen Liu Wanyue Ye Hua Lin Caicheng Song Zeming Rong Rongwen Lu Hao Zhang He Huang Zhicheng Tang Shufen Zhang 

机构地区：[1]State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian,Liaoning,116024 China

出　　处：《Chinese Journal of Chemistry》2021年第10期2843-2851,共9页中国化学（英文版）

基　　金：supported by the Joint Funds of the National Natural Science Foundation of China(U1608223);National Natural Science Foundation of China(22078044);the Dalian High-level Talents Innovation Support Program(2019RD06);the Liaoning Revitalization Talent Program(1801006).

摘　　要：Main observation and conclusion A catalyst PdxCuy/NC in which Pd-Cu alloy nanoparticles are superficially embeded in shell of surface-porous N-doped carbon nanosphere was successfully devised for p-chloronitrobenzene(p-CNB)selective hydrogenation.Bimetal ions were loaded in shell of a m-phenylenediamine derived core-shell polymer sphere and the catalyst was obtained after calcination under reducing atmosphere.The as synthesized catalyst exhibited high selectivity in hydrogenation of p-CNB to p-chloroaniline(p-CAN)(up to 98.8%)under full conversion and the performance was basically remained after 6 cyclic experiments.The reasons for the high selectivity were discussed based on the characterization results of catalyst.The interaction between N-doped support and metal atoms affected the electron distribution in alloy,electron-deficient Pd and electron-rich Cu,and thus improved hydrogenation selectivity.In addition,the alloy nanoparticles were distributed only in the porous shell of support,which benefits to prevent side reactions.This work described a scheme for tactfully designing catalyst for selective hydrogenation,which can provide experience and inspiration for relevant works and fields.

关 键 词：Alloys Supported catalysts CHEMOSELECTIVITY P-CHLORONITROBENZENE Superficially embedding 

分 类 号：TB383[一般工业技术—材料科学与工程] O643.36[理学—物理化学]