Electrochemical reduction of CO2 to ethane through stabilization of an ethoxy intermediate
Article
Article Title | Electrochemical reduction of CO2 to ethane through stabilization of an ethoxy intermediate |
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ERA Journal ID | 1313 |
Article Category | Article |
Authors | Vasileff, Anthony (Author), Zhu, Yanping (Author), Zhi, Xing (Author), Zhao, Yongqiang (Author), Ge, Lei (Author), Chen, Hao Ming (Author), Zheng, Yao (Author) and Qiao, Shi-Zhang (Author) |
Journal Title | Angewandte Chemie |
Journal Citation | 59 (4), pp. 19649-19653 |
Number of Pages | 5 |
Year | 2020 |
Place of Publication | Weinheim, Germany |
ISSN | 0044-8249 |
1433-7851 | |
1521-3773 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/anie.202004846 |
Abstract | Electrochemical conversion of CO2 into ethane is seldom observed because of the generally higher selectivity towards methane, ethylene, and ethanol. Consequently, little experimental evidence for its reaction mechanism exists and thus remains largely unknown. Now, by combining electrochemistry with in situ X-ray absorption fine-structure and in situ Raman techniques, iodide-derived copper (ID-Cu) and oxide-derived copper (OD-Cu) systems were studied to obtain a deeper understanding of the CO2 to ethane mechanism. With trace iodine species on the surface and positively charged Cu species, production of ethane is significantly more favored on ID-Cu compared to OD-Cu, with higher selectivity and faster kinetics. For the first time, it is experimentally found that the formation of ethane follows the same pathway to ethylene and ethanol, and better stabilization of the late stage ethoxy intermediate can steer the reaction to ethane over ethanol. |
Keywords | CO2 reduction; copper catalysts; in situ spectroscopy; Raman; XAFS |
ANZSRC Field of Research 2020 | 400404. Electrochemical energy storage and conversion |
340601. Catalysis and mechanisms of reactions | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Adelaide |
National Taiwan University, Taiwan | |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6070/electrochemical-reduction-of-co2-to-ethane-through-stabilization-of-an-ethoxy-intermediate
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