Regulated CO adsorption by the electrode with OH− repulsive property for enhancing C–C coupling

Qixing Zhang; Dan Ren; Jing Gao; Zhongke Wang; Juan Wang; Sanjiang Pan; Manjing Wang; Jingshan Luo; Ying Zhao; Michael Grätzel; Xiaodan Zhang

Green Chemical Engineering (Sep 2023)

Regulated CO adsorption by the electrode with OH− repulsive property for enhancing C–C coupling

Qixing Zhang,
Dan Ren,
Jing Gao,
Zhongke Wang,
Juan Wang,
Sanjiang Pan,
Manjing Wang,
Jingshan Luo,
Ying Zhao,
Michael Grätzel,
Xiaodan Zhang

Affiliations

Qixing Zhang: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
Dan Ren: Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
Jing Gao: Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
Zhongke Wang: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
Juan Wang: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
Sanjiang Pan: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
Manjing Wang: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
Jingshan Luo: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
Ying Zhao: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
Michael Grätzel: Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
Xiaodan Zhang: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China; Corresponding author.

Journal volume & issue: Vol. 4, no. 3
pp. 331 – 337

Abstract

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Electrochemical CO2 reduction driven by renewable electricity is one of the promising strategies to store sustainable energy as fuels. However, the selectivity of value-added multi-carbon products remains poor for further application of this process. Here, we regulate CO adsorption by forming a Nafion layer on the copper (Cu) electrode that is repulsive to OH−, contributing to enhanced selectivity of CO2 reduction to C2+ products with the suppression of C1 products. The operando Raman spectroscopy indicates that the local OH− would adsorb on part of active sites and decrease the adsorption of CO. Therefore, the electrode with repulsive to OH− can adjust the concentration of OH−, leading to the increased adsorption of CO and enhanced C–C coupling. This work shows that electrode design could be an effective strategy for improving the selectivity of CO2 reduction to multi-carbon products.

Published in Green Chemical Engineering

ISSN: 2666-9528 (Online)
Publisher: KeAi Communications Co. Ltd.
Country of publisher: China
LCC subjects: Technology: Chemical technology: Chemical engineering; Science: Chemistry: Organic chemistry: Biochemistry
Website: https://www.keaipublishing.com/en/journals/green-chemical-engineering/

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