Tuning electron delocalization and surface area in COFs derived N,B co-doped carbon materials for efficient selective hydrogenation of nitroarenes  

作　　者：Hao Hu Chunlei Song Di Wang Yinglong Tao Shijian Zhou Yan Kong 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China

出　　处：《Chinese Chemical Letters》2023年第5期315-318,共4页中国化学快报（英文版）

基　　金：National Natural Science Foundation of China(Nos.21776129 and 21706121);Natural Science Foundation of Jiangsu Province(No.BK20170995);Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX211171);the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。

摘　　要：Metal-free carbon catalysts with excellent conduction performance have drawn much research attention in reduction reactions.Herein,a N,B co-doped carbon catalyst with high pyrrolic N proportion(35.75%)and excellent surface area(1409 m^(2)/g)was successfully prepared via carbonizing covalent organic framework materials(COFs)containing N and B atoms assisted by ZnCl_(2)molten salt.The presence of ZnCl_(2)maintains the micropore structure of COFs to provide high specific surface areas and abundant lattice defects for carbon materials.In addition,electron-withdrawing B heteroatom further facilitates the formation of pyrrolic N at defect sites by modifying the electronic structure of carbon network.The tuning of surface areas and active N species in carbon catalysts successfully improve the selective hydrogenation of nitrobenzene to aniline.The optimized carbon material exhibits excellent nitrobenzene conversion(99.9%)and aniline selectivity(>99%)within 15 min,as well as excellent substrate suitability.This work provides a certain guiding for the design and application of metal-free catalysis.

关 键 词：N B co-doped carbon materials COFs carbonization Molten salt assist N species regulation Hydrogenation of nitroarenes 

分 类 号：TQ246.31[化学工程—有机化工] TQ426