Vertical Cu Nanoneedle Arrays Enhance the Local Electric Field Promoting C2 Hydrocarbons in the CO2 Electroreduction

被引:132
作者
Zhou, Yajiao [1 ]
Liang, Yanqing [1 ,2 ]
Fu, Junwei [1 ]
Liu, Kang [1 ]
Chen, Qin [1 ]
Wang, Xiqing [1 ]
Li, Hongmei [1 ]
Zhu, Li [3 ]
Hu, Junhua [4 ]
Pan, Hao [5 ,6 ]
Miyauchi, Masahiro [7 ]
Jiang, Liangxing [2 ]
Cortes, Emiliano [3 ]
Liu, Min [1 ]
机构
[1] Cent South Univ, Hunan Joint Int Res Ctr Carbon Dioxide Resource U, Sch Phys & Elect, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China
[3] Ludwig Maximilians Univ Munchen, Fac Phys, Chair Hybrid Nanosyst, D-80539 Munich, Germany
[4] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
[5] Cent South Univ, Xiangya Stomatol Hosp, Dept Periodont, Changsha 410008, Peoples R China
[6] Cent South Univ, Xiangya Stomatol Hosp, Oral Mucosal Sect, Changsha 410008, Peoples R China
[7] Tokyo Inst Technol, Sch Mat & Chem Technol, Dept Mat Sci & Engn, Tokyo 1528552, Japan
关键词
copper; nanoneedle arrays; CO2; reduction; *CO adsorption; C-2; hydrocarbon; ELECTROCHEMICAL REDUCTION; CARBON-DIOXIDE; CATALYSTS; SELECTIVITY; PRODUCTS; MECHANISM; COVERAGE;
D O I
10.1021/acs.nanolett.1c04653
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Electrocatalytic reduction of CO2 to multicarbon products is a potential strategy to solve the energy crisis while achieving carbon neutrality. To improve the efficiency of multicarbon products in Cu-based catalysts, optimizing the *CO adsorption and reducing the energy barrier for carbon-carbon (C-C) coupling are essential features. In this work, a strong local electric field is obtained by regulating the arrangement of Cu nanoneedle arrays (CuNNAs). CO2 reduction performance tests indicate that an ordered nanoneedle array reaches a 59% Faraday efficiency for multicarbon products (FEC2) at -1.2 V (vs RHE), compared to a FEC2 of 20% for a disordered nanoneedle array (CuNNs). As such, the very high and local electric fields achieved by an ordered Cu nanoneedle array leads to the accumulation of K+ ions, which benefit both *CO adsorption and C-C coupling. Our results contribute to the design of highly efficient catalysts for multicarbon products.
引用
收藏
页码:1963 / 1970
页数:8
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