Details

Autor(en) / Beteiligte

• Zhou, Yajiao
• Liang, Yanqing
• Fu, Junwei
• Liu, Kang
• Chen, Qin
• Wang, Xiqing
• Li, Hongmei
• Zhu, Li
• Hu, Junhua
• Pan, Hao
• Miyauchi, Masahiro
• Jiang, Liangxing
• Cortés, Emiliano
• Liu, Min

Titel

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

Ist Teil von

• Nano letters, 2022-03, Vol.22 (5), p.1963-1970

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.