Enhanced Ethylene Production from Electrocatalytic Acetylene Semi-hydrogenation Over Porous Carbon-Supported Cu Nanoparticles  

作　　者：Li Li Fanpeng Chen Bo-Hang Zhao Yifu Yu 

机构地区：[1]Institute of Molecular Plus,Department of Chemistry,School of Science,Tianjin University,Tianjin 300072,China

出　　处：《Transactions of Tianjin University》2024年第4期297-304,共8页天津大学学报（英文版）

基　　金：We acknowledge the National Natural Science Foundation of China(Nos.22271213 and 22209120).

摘　　要：Electrocatalytic semi-hydrogenation of acetylene(C_(2)H_(2))over copper nanoparticles(Cu NPs)offers a promising non-petroleum alternative for the green production of ethylene(C2H4).However,server hydrogen evolution reaction(HER)competition in this process prominently decreases C2H4 selectivity,thereby hindering its practical application.Herein,a Cu-based composite catalyst,wherein porous carbon with nanoscale pores was used as a support,is constructed to gather the C_(2)H_(2) feedstocks for suppressing the undesirable HER.As a result,the as-prepared catalyst exhibited C_(2)H_(2) conversion of 27.1%and C_(2)H_(4) selectivity of 88.4%at a C2H4 partial current density of 0.25 A/cm^(2) under optimal−1.0 V versus reversible hydrogen electrode(RHE)under the simulated coal-derived C_(2)H_(2) atmosphere,significantly outperforming the single Cu NPs counterparts.In addition,a series of in situ and ex situ experimental results show that not only the porous nature of the carbon support but also the stabilized Cu^(0)–Cu^(+) dual active sites through the strong metal–support interactions enhance the adsorption capacity of C_(2)H_(2),leading to high C_(2)H_(2) partial pressure,restraining the HER and thus improving the C2H4 selectivity.

关 键 词：ELECTROCATALYSIS Cu-based catalyst HYDROGENATION ETHYLENE SELECTIVITY 

分 类 号：TQ221.211[化学工程—有机化工] O643.36[理学—物理化学]