A dendritic Cu/Cu_(2)O structure with high curvature enables rapid and efficient reduction of carbon dioxide to C2 in an H-cell

作     者：Lei shao Bochen Hu Jinhui Hao Junjie Jin Weidong Shi Min Chen 邵磊;胡博琛;郝金辉;荆俊杰;施伟东;陈敏

作者机构：School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013JiangsuChina 

基　　金：国家自然科学基金(22225808,22075111) 中德合作集团项目(GZ1579) 江苏省国际科技创新支撑计划合作项目(BZ2022045) 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2024年第63卷第8期

页      码：144-153页

摘      要：Electrocatalytic reduction of CO_(2)(CO_(2)RR)to multicarbon products is an efficient approach for ad-dressing the energy crisis and achieving carbon *** H-cells,achieving high-current C_(2)products is challenging because of the inefficient mass transfer of the catalyst and the presence of the hydrogen evolution reaction(HER).In this study,dendritic Cu/Cu_(2)O with abundant Cu^(0)/Cu^(+)interfaces and numerous dendritic curves was synthesized in a CO_(2)atmosphere,resulting in the high selectivity and current density of the C_(2)*** Cu/Cu_(2)O achieved a C_(2)Faradaic efficiency of 69.8%and a C_(2)partial current density of 129.5 mA cm^(-2)in an *** element simulations showed that a dendritic structure with a high curvature generates a strong electric field,leading to a localized CO_(2)***,DRT analysis showed that a dendritic struc-ture with a high curvature actively adsorbed the surrounding high concentration of CO_(2),enhancing the mass transfer rate and achieving a high current *** the experiment,the impact of the electronic structure on the performance of the catalyst was investigated by varying the atomic ratio of Cu^(0)/Cu^(+)on the catalyst surface,which resulted in improved ethylene *** the optimal atomic ratio of Cu^(0)/Cu^(+),the charge transfer resistance was minimized,and the desorption rate of the intermediates was low,favoring C_(2)*** functional theory calculations indicated that the Cu^(0)/Cu^(+)interfaces exhibited a lower Gibbs free energy for the rate-determining step,enhancing C_(2)H4 *** Cu/Cu_(2)O catalyst also exhibited a low Cu d-band center,which enhanced the adsorption stability of*CO on the surface and facilitated C_(2)*** observa-tion explained the higher yield of C_(2)products at the Cu^(0)/Cu^(+)interface than that of H_(2)under rapid mass *** results of the net present value model showed that the H-cell holds

主 题 词：Reduction of CO_(2) High current Dendritic structure Cu/Cu_(2)O H-cell 

学科分类：081704[081704] 07[理学] 070304[070304] 08[工学] 0817[工学-轻工类] 0703[理学-化学类] 

核心收录：

D　O　I：10.1016/S1872-2067(24)60079-3

馆 藏 号：203134514...