•  
  •  
 
Nano Research

Article Title

Selectivity regulation of CO2 electroreduction through contact interface engineering on superwetting Cu nanoarray electrodes

Authors

Zhao Cai, State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Yusheng Zhang, State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Yuxin Zhao, State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering, No. 339, Songling road, Laoshan District, Qingdao 266101, China
Yueshen Wu, Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, USA
Wenwen Xu, State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, USA
Xuemei Wen, State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Yang Zhong, State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China College of Energy, Beijing University of Chemical Technology, Beijing 100029, China
Ying Zhang, School of Chemistry, Monash University, Wellington Road, Clayton 3800, VIC, Australia
Wen Liu, State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Hailiang Wang, Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, USA
Yun Kuang, State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Xiaoming Sun, State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China College of Energy, Beijing University of Chemical Technology, Beijing 100029, China

Keywords

CO2 reduction, selectivity, copper, contact interface, reaction kinetics

Abstract

Electrocatalytic CO2 reduction is a promising way to mitigate the urgent energy and environmental issues, but how to increase the selectivity for desired product among multiple competing reaction pathways remains a bottleneck. Here, we demonstrate that engineering the gas–liquid–solid contact interface on the electrode surface could tailor the selectivity of CO2 reduction and meanwhile suppress H2 production through regulated reaction kinetics. Specifically, polytetrafluoroethylene (PTFE) was utilized to modify a Cu nanoarray electrode as an example, which is able to change the electrode surface from aerophobic to aerophilic state. The enriched nano-tunnels of the Cu nanoarray electrode can facilitate CO2 transportation and pin gaseous products on the electrode surface. The latter is believed to be the reason that boosts the Faradaic efficiency of liquid products by 67% and limits the H2 production to less than half of before. This interface engineering strategy also lowered H2O (proton) affinity, therefore promoting CO and HCOOH production. Engineering the electrode contact interface controls the reaction kinetics and the selectivity of products, which should be inspiring for other electrochemical reactions.

Graphical Abstract

Publisher

Tsinghua University Press

Share

COinS