Electron-Efficient Co-Electrosynthesis of Formates from CO 2 and Methanol Feedstocks.

Autor: Li X; State Key Laboratory of Structural Chemistry, Fujian Provincial Key Laboratory of Material and Techniques toward Hydrogen Energy, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China.; College of Chemistry and Materials Science, Fujian Normal University, 350002, Fuzhou, Fujian, China.; Fujian College, University of Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China., Chen Q; State Key Laboratory of Structural Chemistry, Fujian Provincial Key Laboratory of Material and Techniques toward Hydrogen Energy, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China.; College of Chemistry and Materials Science, Fujian Normal University, 350002, Fuzhou, Fujian, China.; Fujian College, University of Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China., Sun W; State Key Laboratory of Structural Chemistry, Fujian Provincial Key Laboratory of Material and Techniques toward Hydrogen Energy, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China.; Fujian College, University of Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China., He C; State Key Laboratory of Structural Chemistry, Fujian Provincial Key Laboratory of Material and Techniques toward Hydrogen Energy, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China., Wen Z; State Key Laboratory of Structural Chemistry, Fujian Provincial Key Laboratory of Material and Techniques toward Hydrogen Energy, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China.; Fujian College, University of Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2024 Nov 04; Vol. 63 (45), pp. e202412410. Date of Electronic Publication: 2024 Sep 17.
DOI: 10.1002/anie.202412410
Abstrakt: The electrochemical conversion of CO 2 into valuable chemicals using renewable electricity shows significant promise for achieving carbon neutrality and providing alternative energy storage solutions. However, its practical application still faces significant challenges, including high energy consumption, poor selectivity, and limited stability. Here, we propose a hybrid acid/alkali electrolyzer that couples the acidic CO 2 reduction reaction (CO 2 RR) at the cathode with alkaline methanol oxidation reaction (MOR) at the anode. This dual electro-synthesis cell is implemented by developing Bi nanosheets as cathode catalysts and oxide-decorated Cu 2 Se nanoflowers as anode catalysts, enabling high-efficiency electron utilization for formate production with over 180 % coulombic efficiency and more than 90 % selectivity for both CO 2 RR and MOR conversion. The hybrid acid/alkali CO 2 RR-MOR cell also demonstrates long-term stability exceeding 90 hours of continuous operation, delivers a formate partial current density of 130 mA cm -2 at a voltage of only 2.1 V, and significantly reduces electricity consumption compared to the traditional CO 2 electrolysis system. This study illuminates an innovative electron-efficiency and energy-saving techniques for CO 2 electrolysis, as well as the development of highly efficient electrocatalysts.
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
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