| Autor: |
Niu Zhuang-Zhuang, Chi Li-Ping, Wu Zhi-Zheng, Yang Peng-Peng, Fan Ming-Hui, Gao Min-Rui |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
National Science Open, Vol 2 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2097-1168 |
| DOI: |
10.1360/nso/20220044 |
| Popis: |
The electrochemical CO2 reduction reaction (CO2RR) on Cu catalyst holds great promise for converting CO2 into valuable multicarbon (C2+) compounds, but still suffers poor selectivity due to the sluggish kinetics of forming carbon–carbon (C–C) bonds. Here we reported a perovskite oxide-derived Cu catalyst with abundant grain boundaries for efficient C–C coupling. These grain boundaries are readily created from the structural reconstruction induced by CO2-assisted La leaching. Using this defective catalyst, we achieved a maximum C2+ Faradaic efficiency of 80.3% with partial current density over 400 mA cm−2 in neutral electrolyte in a flow-cell electrolyzer. By combining the structural and spectroscopic investigations, we uncovered that the in-situ generated defective sites trapped by grain boundaries enable favorable CO adsorption and thus promote C–C coupling kinetics for C2+ products formation. This work showcases the great potential of perovskite materials for efficient production of valuable multicarbon compounds via CO2RR electrochemistry. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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