文献类型：期刊文献

英文题名：Polyethyleneimine-functionalized mesoporous carbon nanosheets as metal-free catalysts for the selective oxidation of H2S at room temperature

作者：Wang, Jitong[1,2];Ke, Chengyu[1];Jia, Xianfeng[1,3];Ma, Cheng[1];Liu, Xiaojun[1];Qiao, Wenming[1];Ling, Licheng[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China;[3]Tangshan Normal Univ, Dept Chem, Tangshan 063000, Peoples R China

年份：2021

卷号：283

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20204409433765);WOS:【SCI-EXPANDED(收录号:WOS:000600016900008)】；

基金：This work is partly supported by the National Natural Science Foundation of China (No. 21978097, U1710252), CAS Key Laboratory of Carbon Materials (No: KLCMKFJJ2001), the Fundamental Research Funds for the Central Universities (222201817001, 50321041918013, 50321042017001).

语种：英文

外文关键词：Hydrogen sulfide; Polyethyleneimine; Carbon nanosheets; Catalytic oxidation

摘要：Nitrogen-functionalized mesoporous carbon nanosheets are designed and constructed by supporting polyethyleneimine (PEI) on mesoporous carbon nanosheets. The carbon nanosheets possess a two-dimensional lamellar structure, interconnected mesoporous framework and highly dispersed PEI with considerable basic sites which work cooperatively to improve the desulfurization capability at room temperature. The appropriate residual pores after PEI loading provide a fast H2S diffusion channel, accessible interfacial area and storeroom for the product. Moreover, the nanosheet structure could shorten the diffusion pathway to promote the reaction kinetics. The nitrogen functional group of PEI as base sites is effective to enhance the interaction with H2S and facilitate its dissociation into HS, resulting in a high breakthrough sulfur capacity of 13.68 mmol/g. A reaction mechanism by the combination of amine group promoted H2S dissociation and carbon induced O-2 activation is proposed. This work raises the possibility of employing nitrogen-functionalized porous carbons as efficient catalyst for H2S selective oxidation.