氧化气氛对ZnO电催化CO_(2)还原CO选择性的影响  

Influence of Oxidising Atmosphere on Electrocatalytic CO_(2)Reduction to CO Selectivity of ZnO Catalyst

作　　者：唐雨浓 魏梓豪 孙敏 闫晓霖[1] TANG Yu-nong;WEI Zi-hao;SUN Min;YAN Xiao-lin(School of Science,Inner Mongolia Agricultural University,Inner Mongolia Hohhot 010018;School of Chemistry and Chemical Engineering,Inner Mongolia University,Inner Mongolia Hohhot 010021,China)

机构地区：[1]内蒙古农业大学理学院,内蒙古呼和浩特010018 [2]内蒙古大学化学与化工学院,内蒙古呼和浩特010021

出　　处：《广州化工》2024年第16期41-45,共5页GuangZhou Chemical Industry

摘　　要：利用电还原技术将CO_(2)转化为高附加值的化学原料CO气体可以减少碳排放,改善环境。本文研究ZnO催化剂在饱和CO_(2)的KHCO3溶液对CO_(2)还原反应的催化活性,探究催化剂的合成方法和制备条件对催化活性的影响。研究表明,在O_(2)气氛下合成的ZnO对CO_(2)的还原能力优于其他气氛煅烧合成的ZnO,制备的ZnO-3催化剂具有更快的电子传输速率,在-1.2 V(vs.RHE)对CO的选择性最高,法拉第效率可达到84.5%。Carbon emissions can be reduced and the environment improved by converting CO_(2)into the high value-added chemical raw material CO gas using electro-reduction technology.The catalytic activity of ZnO catalysts for CO_(2)reduction reactions in KHCO_(3) solutions saturated with CO_(2)was investigated and the effect of the method of catalyst synthesis and the preparation conditions on the catalytic activity was studied.It was found that ZnO synthesised in an O_(2)atmosphere had a better ability to reduce CO_(2)than ZnO synthesised by calcination in other atmospheres.The prepared ZnO-3 catalyst had a faster electron transfer rate,with the highest selectivity for CO at-1.2 V(vs.RHE)and a Faraday efficiency of 84.5%.

关 键 词：CO_(2)还原 电催化 CO 氧化锌 

分 类 号：O614.24[理学—无机化学] TQ151.5[理学—化学]