Low-Crystalline AuCuIn Catalyst for Gaseous CO2 Electrolyzeropen access
- Authors
- Han, Gyeong Ho; Kim, Junhyeong; Jang, Seohyeon; Kim, Hyunki; Guo, Wenwu; Hong, Seokjin; Shin, Junhyeop; Nam, Inho; Jang, Ho Won; Kim, Soo Young; Ahn, Sang Hyun
- Issue Date
- Mar-2022
- Publisher
- WILEY
- Keywords
- electrochemical carbon dioxide reduction; electrodeposition; gas diffusion electrodes; low-crystalline trimetallic catalysts; membrane electrode assembly-based electrolyzers
- Citation
- ADVANCED SCIENCE, v.9, no.8
- Journal Title
- ADVANCED SCIENCE
- Volume
- 9
- Number
- 8
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/54881
- DOI
- 10.1002/advs.202104908
- ISSN
- 2198-3844
2198-3844
- Abstract
- Despite its importance for the establishment of a carbon-neutral society, the electrochemical reduction of CO2 to value-added products has not been commercialized yet because of its sluggish kinetics and low selectivity. The present work reports the fabrication of a low-crystalline trimetallic (AuCuIn) CO2 electroreduction catalyst and demonstrates its high performance in a gaseous CO2 electrolyzer. The high Faradaic efficiency (FE) of CO formation observed at a low overpotential in a half-cell test is ascribed to the controlled crystallinity and composition of this catalyst as well as to its faster charge transfer, downshifted d-band center, and low oxophilicity. The gaseous CO2 electrolyzer with the optimal catalyst as the cathode exhibits superior cell performance with a high CO FE and production rate, outperforming state-of-the-art analogs. Thus, the obtained results pave the way to the commercialization of CO2 electrolyzers and promote the establishment of a greener society.
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