硫掺杂强化铜基氮化碳材料电催化还原CO_(2)  

Enhancement of electrocatalytic reduction of carbon dioxide by sulfur doping in to a copper-based carbon nitride material

作　　者：高凤如 刘志超 肖发沂 石颖颖 俞伟婷 胡俊 GAO Fengru;LIU Zhichao;XIAO Fayi;SHI Yingying;YU Weiting;HU Jun(College of Animal Science and Technology,Shandong Vocational Animal Science and Veterinary College,Weifang 261061,China;Zhejiang Yilong Environmental Protection Technology Co.,Ltd.,Hangzhou 310000,China;College of Environment,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]山东畜牧兽医职业学院动物科技学院,山东潍坊261061 [2]浙江一龙环保科技有限公司,浙江杭州310000 [3]浙江工业大学环境学院,浙江杭州310014

出　　处：《化工环保》2024年第3期441-448,共8页Environmental Protection of Chemical Industry

基　　金：山东省高等学校低碳绿色养殖新技术研发中心项目;潍坊市生态循环农业工程实验室项目;潍坊高新区2021年科技惠民计划项目(2021KJHM19)。

摘　　要：制备了硫掺杂铜基氮化碳(CuSx-C_(3)N_(4))催化材料,运用SEM、EDS、TEM、XRD、XPS等技术对其进行了表征,并将其用于以CO为目标产物的电催化CO_(2)还原反应(CO_(2)RR),采用CO法拉第效率和分电流密度分别表征催化材料的CO选择性和催化活性。结果表明:硫掺杂提高了Cu-C_(3)N_(4)材料的CO选择性和催化活性;在掺硫量为1.5%、电位为-0.65 V(相对于可逆氢电极)的最佳条件下,CuSx-C_(3)N_(4)材料的CO选择性最高,CO法拉第效率高达90%;吡啶N比石墨N更易催化CO_(2)RR生成CO,硫掺杂提高了催化材料中吡啶N的占比;相对于Cu-C_(3)N_(4)材料,掺硫量为1.5%的CuSx-C_(3)N_(4)材料中吡啶N占比从22%升至35%,石墨N占比从15%降至12%。In this study,the CuSx-C_(3)N_(4)catalyst was prepared and characterized by SEM,EDS,TEM,XRD,and XPS.Then,the catalyst was used for the electrocatalytic reduction reaction of CO_(2)(CO_(2)RR)with CO as the target product.Faraday efficiency and partial current density were used to characterize the CO selectivity and catalytic activity of the CuSx-C_(3)N_(4)catalyst,respectively.The results show that sulfur doping improves the CO selectivity and catalytic activity of the Cu-C_(3)N_(4)catalyst.When the sulfur content is 1.5%,and the potential is-0.65 V(relative to the reversible hydrogen electrode),the CO selectivity of the CuSx-C_(3)N_(4)catalyst achieves the highest,and the Faraday efficiency of CO is as high as 90%.Pyridine N is easier to catalyze CO_(2)RR to produce CO than graphite N,and sulfur doping increases the proportion of pyridine N in the catalyst.Compared with the Cu-C_(3)N_(4)catalyst,the proportion of pyridine N in the CuSx-C_(3)N_(4)catalyst with a sulfur content of 1.5%increases from 22%to 35%,and the proportion of graphite N decreases from 15%to 12%.

关 键 词：硫掺杂 铜基氮化碳 电催化 CO_(2)还原 CO选择性 催化活性 

分 类 号：X701[环境科学与工程—环境工程]