Lu Jun, Ren Yanhan, Liang Jing, Zou Lie, Gao Yan, Li Fei, Gao Junfeng, Liu Jinxuan
State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China.
Union Faculty of Belarusian State Universities, Dalian University of Technology, Dalian, 116024, China.
Small. 2024 Nov;20(45):e2402879. doi: 10.1002/smll.202402879. Epub 2024 Jul 17.
Cu-doped BiOCO catalyst with copper (Cu) acting an electron hunter for conversion of carbon dioxide into formate is developed. The Cu-BiOCO catalyst with hollow microsphere structure extends the duration of CO retention on the catalyst, providing a greater number of active sites. It exhibits remarkable performance with conversion efficacy of 98.5% and current density of 800 mA cm across a wide potential window (-0.8 to -1.3 V vs RHE). Density functional theory investigations reveal that the presence of copper (Cu) significantly enhances the charge density at the active sites and influences the local electronic structure of bismuth (Bi), thereby reducing the energy barrier associated with the transformation of *OCHO species into formate.
开发了一种铜掺杂的BiOCO催化剂，其中铜（Cu）作为电子捕获剂，用于将二氧化碳转化为甲酸盐。具有中空微球结构的Cu-BiOCO催化剂延长了CO在催化剂上的保留时间，提供了更多的活性位点。在宽电位窗口（相对于可逆氢电极，-0.8至-1.3V）下，其表现出卓越的性能，转化效率为98.5%，电流密度为800 mA/cm²。密度泛函理论研究表明，铜（Cu）的存在显著提高了活性位点的电荷密度，并影响了铋（Bi）的局部电子结构，从而降低了与*OCHO物种转化为甲酸盐相关的能垒。
