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

被引：150

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

来源：

NANO LETTERS | 2022年 / 22卷 / 05期

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

页码：1963 / 1970

页数：8