Porous bilayer electrode-guided gas diffusion for enhanced CO2 electrochemical reduction

Wang, Yucheng, Lei, Hanhui, Xiang, Hang, Fu, Yongqing, Xu, Chenxi, Jiang, Yinzhu, Xu, Ben Bin, Yu, Eileen Hao, Gao, Chao and Liu, Terence Xiaoteng 2021. Porous bilayer electrode-guided gas diffusion for enhanced CO2 electrochemical reduction. Advanced Energy & Sustainability Research 2 (11) , 2100083. 10.1002/aesr.202100083

PDF - Published Version Available under License Creative Commons Attribution. Download (1MB)

Abstract

Comparing with the massive efforts in developing innovative catalyst materials system and technologies, structural design of cells has attracted less attention on the road toward high-performance electrochemical CO2 reduction reaction (eCO2RR). Herein, a hybrid gas diffusion electrode-based reaction cell is proposed using highly porous carbon paper (CP) and graphene aerogels (GAs), which is expected to offer directional diffusion of gas molecules onto the catalyst bed, to sustain a high performance in CO2 conversion. The above-mentioned hypothesis is supported by the experimental and simulation results, which show that the CP + GA combined configuration increases the Faraday efficiency (FE) from ≈60% to over 94% toward carbon monoxide (CO) and formate production compared with a CP only cell with Cu2O as the catalyst. It also suppresses the undesirable side reaction–hydrogen evolution over 65 times than the conventional H-type cell (H-cell). By combining with advanced catalysts with high selectivity, a 100% FE of the cell with a high current density can be realized. The described strategy sheds an extra light on future development of eCO2RR with a structural design of cell-enabled high CO2 conversion.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	Wiley Open Access
ISSN:	2699-9412
Date of First Compliant Deposit:	24 January 2023
Last Modified:	03 May 2023 07:43
URI:	https://orca.cardiff.ac.uk/id/eprint/155256

Citation Data

Cited 7 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item