https://scholars.lib.ntu.edu.tw/handle/123456789/575739
Title: | Electrochemical Reduction of CO2 to Ethane through Stabilization of an Ethoxy Intermediate | Authors: | Vasileff A Zhu Y Zhi X Zhao Y Ge L HAO MING CHEN Zheng Y Qiao S.-Z. |
Keywords: | Carbon dioxide; Electrochemistry; Electrolytic reduction; Ethane; Ethanol; Ethylene; Reaction intermediates; Stabilization; X ray absorption; Electrochemical conversion; Electrochemical reductions; Ethoxy intermediates; Experimental evidence; Iodine species; Positively charged; Reaction mechanism; Situ x-rays; Copper oxides | Issue Date: | 2020 | Journal Volume: | 59 | Journal Issue: | 44 | Start page/Pages: | 19649-19653 | Source: | Angewandte Chemie - International Edition | 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. ? 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85085523889&doi=10.1002%2fanie.202004846&partnerID=40&md5=ca74a64ba095d30be9a0621fa5054bdd https://scholars.lib.ntu.edu.tw/handle/123456789/575739 |
ISSN: | 14337851 | DOI: | 10.1002/anie.202004846 |
Appears in Collections: | 化學系 |
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