Cu掺杂SnS_(2)纳米花高效电化学还原CO_(2)合成甲酸盐的研究  

Research on Cu-doped SnS_(2) nanoflowers for efficient electrochemical reduction of CO_(2) to synthesize formate

作　　者：丁笑含 赵林飞 袁章福 田越 徐秉声[2] DING Xiao-han;ZHAO Lin-fei;YUAN Zhang-fu;TIAN Yue;XU Bing-sheng(Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China;Resource and Environmental Branch,China National Institute of Standardization,Beijing 100191,China)

机构地区：[1]北京科技大学钢铁共性技术协同创新中心,北京100083 [2]中国标准化研究院资源环境研究分院,北京100191

出　　处：《现代化工》2025年第1期220-224,共5页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(51974022);国家重点研发计划(2023YFF0614302)。

摘　　要：为了提高Sn基材料表面CO_(2)电化学还原为甲酸盐的法拉第效率,利用一步溶剂热法合成了具有丰富硫空位的Cu掺杂SnS_(2)纳米花(Cu-SnS_(2-x))催化剂,在较宽的电位窗口实现了CO_(2)电化学还原制备甲酸盐。结果表明,通过调控催化剂制备过程中Cu和Sn的摩尔比,在-1.1 V vs.RHE电位条件下得到了72.64%的FE_(formate),电流密度J_(formate)达到-14.38 mA/cm^(2)。二维纳米片阵列增加了催化活性位点,Cu掺杂所产生的硫空位能够协同提高催化活性、促进电子转移,从而提高甲酸盐的选择性。To enhance the Faraday efficiency of the surface of Sn-based materials for electrochemical reduction of CO_(2) to formate,Cu-doped SnS_(2) nanoflower(Cu-SnS_(2-x))catalysts enriched with sulfur vacancies are synthesized via a one-step solvothermal method.The prepared catalysts facilitate the electrochemical reduction of CO_(2) to formate over a broad potential window.By adjusting the molar ratio of Cu to Sn during the catalyst preparation process,a formate Faraday efficiency of 72.64% is achieved at a potential of -1.1 V vs.RHE,with a formate current density reaching -14.38 mA·cm^(-2).Two-dimensional nanosheet array increases the active sites of the catalysts,and the sulfur vacancies induced by Cu doping synergistically enhances catalytic activity and facilitates electron transfer,thereby improving the selectivity of formate.

关 键 词：CO_(2)还原 电化学 掺杂 溶剂热 甲酸 

分 类 号：O643.36[理学—物理化学] X757[理学—化学]