Electric-field promoted C–C coupling over Cu nanoneedles for CO_(2) electroreduction to C_(2) products

作     者：HuangJingWei Li Huimin Zhou Yajiao Zhou Junhua Hu Masahiro Miyauchi Junwei Fu Min Liu 李黄经纬;周惠敏;周亚姣;胡俊华;Masahiro Miyauchi;傅俊伟;刘敏

作者机构：Hunan Provincial Key Laboratory of Chemical Power SourcesState Key Laboratory of Powder MetallurgySchool of Physics and ElectronicsCentral South UniversityChangsha 410083HunanChina School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450002HenanChina Department of Materials Science and EngineeringSchool of Materials and Chemical TechnologyTokyo Institute of TechnologyTokyo 152-8552Japan 

基　　金：国家自然科学基金(1872174,22002189,U1932148) 国家科技部重点研发国际间合作项目(2017YFE0127800,2018YFE0203402) 湖南省重点领域研发计划(2020WK2002) 湖南省自然科学基金(2020JJ2041,2020JJ5691) 湖南省科技计划项目(2017XK20262,2017TP1001) 深圳科技创新项目(JCYJ20180307151313532) 中南大学中央高校基本科研业务费专项资金 

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

年 卷 期：2022年第43卷第2期

页      码：519-525页

摘      要：Cu-based catalysts are the most promising candidates for electrochemical CO_(2)reduction(CO_(2)RR)to multi-carbon(C_(2))*** the C-C coupling process,the rate-determining step for C_(2)product generation,is an important strategy to improve the production and selectivity of the C_(2)*** this study,we determined that the local electric field can promote the C-C coupling reaction and enhance CO_(2)electroreduction to C_(2)***,finite-element simulations indicated that the high curvature of the Cu nanoneedles results in a large local electric field on their *** functional theory(DFT)calculations proved that a large electric field can promote C-C *** by this prediction,we prepared a series of Cu catalysts with different *** Cu nanoneedles(NNs)exhibited the largest number of curvatures,followed by the Cu nanorods(NRs),and Cu nanoparticles(NPs).The Cu NNs contained the highest concentration of adsorbed K+,which resulted in the highest local electric field on the *** adsorption sensor tests indicated that the Cu NNs exhibited the strongest CO adsorption ability,and in-situ Fourier-transform infrared spectroscopy(FTIR)showed the strongest*COCO and*CO signals for the Cu *** experimental results demonstrate that high-curvature nanoneedles can induce a large local electric field,thus promoting C-C *** a result,the Cu NNs show a maximum FEC_(2)of 44%for CO_(2)RR at a low potential(-0.6 V ***),which is approximately 2.2 times that of the Cu *** work provides an effective strategy for enhancing the production of multi-carbon products during CO_(2)RR.

主 题 词：Electric-field effect C–C coupling Cu nanoneedle C_(2)products CO_(2)electroreduction 

学科分类：083002[083002] 0830[工学-生物工程类] 081705[081705] 08[工学] 0817[工学-轻工类] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/S1872-2067(21)63866-4

馆 藏 号：203107128...