Enhance the activity of multi-carbon products for Cu via P doping towards CO2 reduction

• 作者: Xiangdong Kong Cheng Wang Han Zheng Zhigang Geng Jun Bao Jie Zeng
• 来源期刊: 中国科学：化学（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: ARTICLES
• 页码范围: 1096-1102
• 页数: 7页
• 语种: 英文

摘要

Electronic structure engineering is a powerful method to tailor the behavior of adsorbed intermediates on the surface of catalysts,thus regulating catalytic activity towards CO2 electroreduction.Herein,we prepared a series of P-doped Cu catalysts for CO2 electroreduction into multi-carbon(C2+)products by regulating the surface electronic structure of Cu.The introduction of P could stabilize the surface Cuδ+species,enhancing the activity for C2+products via adjusting the adsorbed strength of the CO intermediates(CO).When the molar ratio of P to Cu was 8.3％,the catalyst exhibited a Faradaic efficiency of 64％for C2+products,which was 1.9 times as high as that(33％)for Cu catalysts at the applied current density of 210 mA cm 2.Notably,at the applied current density of 300 mA cm-2,the P-doped Cu catalyst with the molar ratio of P to Cu of 8.3％exhibited the highest partial current density for C2+products of 176 mA cm-2,whereas the partial current density for C2+products over the Cu catalyst was only 84 mA cm-2.Mechanistic studies revealed that modulating the molar ratios of P to Cu regulated the adsorbed strength of *CO.A moderate adsorbed strength of *CO induced by appropriate P doping was responsible for the facilitated C-C coupling process.