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- Publisher Website: 10.1038/s41929-023-01046-8
- Scopus: eid_2-s2.0-85174492778
- WOS: WOS:001085944100001
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Article: Electrochemical acetate production from high-pressure gaseous and liquid CO2
Title | Electrochemical acetate production from high-pressure gaseous and liquid CO2 |
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Authors | |
Issue Date | 19-Oct-2023 |
Publisher | Nature Research |
Citation | Nature Catalysis, 2023 How to Cite? |
Abstract | Electroreduction of CO2 (CO2RR) to high-value chemicals is important to environmental and energy landscapes, with one of the challenges being direct and efficient acetate production. Here we demonstrate a Cu(OH)2-derived Cu/CuOx catalyst that achieves 87% Faradaic efficiency for the CO2RR to acetate in KOH electrolytes with borate additives under 58 atm CO2(g). Dynamic electrolytic speciation reveals high and low concentrations of dissolved CO2(aq) and proton donor HCO3−, respectively, as the key to acetate. In situ Raman spectroscopy suggests that the oxygen-bound bidentate intermediate *OC•O* formed as the acetate precursor on Cu(I) under high pressures. Introducing CO2(l) to the interface between CO2(g) and the electrolyte by melting CO2(s) further increases [CO2(aq)] and boosts the acetate partial current density to 86 mA cm–2 with 71% Faradaic efficiency. A Cu2+ cross-linked alginate coating layer on the cathode surface drastically enhances the durability of Cu/CuOx catalyst over a 20 h reaction, affording a potassium acetate yield of 30 mg h−1 cm−2 directly from the CO2RR. |
Persistent Identifier | http://hdl.handle.net/10722/340570 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, Jiachen | - |
dc.contributor.author | Kuang, Yun | - |
dc.contributor.author | Zhang, Xiao | - |
dc.contributor.author | Hung, Wei-Hsuan | - |
dc.contributor.author | Chiang, Ching-Yu | - |
dc.contributor.author | Zhu, Guanzhou | - |
dc.contributor.author | Chen, Gan | - |
dc.contributor.author | Wang, Feifei | - |
dc.contributor.author | Liang, Peng | - |
dc.contributor.author | Dai, Hongjie | - |
dc.date.accessioned | 2024-03-11T10:45:35Z | - |
dc.date.available | 2024-03-11T10:45:35Z | - |
dc.date.issued | 2023-10-19 | - |
dc.identifier.citation | Nature Catalysis, 2023 | - |
dc.identifier.uri | http://hdl.handle.net/10722/340570 | - |
dc.description.abstract | <p>Electroreduction of CO<sub>2</sub> (CO<sub>2</sub>RR) to high-value chemicals is important to environmental and energy landscapes, with one of the challenges being direct and efficient acetate production. Here we demonstrate a Cu(OH)<sub>2</sub>-derived Cu/CuO<sub><em>x</em></sub> catalyst that achieves 87% Faradaic efficiency for the CO<sub>2</sub>RR to acetate in KOH electrolytes with borate additives under 58 atm CO<sub>2</sub>(g). Dynamic electrolytic speciation reveals high and low concentrations of dissolved CO<sub>2</sub>(aq) and proton donor HCO<sub>3</sub><sup>−</sup>, respectively, as the key to acetate. In situ Raman spectroscopy suggests that the oxygen-bound bidentate intermediate *OC<sup>•</sup>O* formed as the acetate precursor on Cu(I) under high pressures. Introducing CO<sub>2</sub>(l) to the interface between CO<sub>2</sub>(g) and the electrolyte by melting CO<sub>2</sub>(s) further increases [CO<sub>2</sub>(aq)] and boosts the acetate partial current density to 86 mA cm<sup>–</sup><sup>2</sup> with 71% Faradaic efficiency. A Cu<sup>2+</sup> cross-linked alginate coating layer on the cathode surface drastically enhances the durability of Cu/CuO<sub><em>x</em></sub> catalyst over a 20 h reaction, affording a potassium acetate yield of 30 mg h<sup>−1</sup> cm<sup>−2</sup> directly from the CO<sub>2</sub>RR.</p> | - |
dc.language | eng | - |
dc.publisher | Nature Research | - |
dc.relation.ispartof | Nature Catalysis | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Electrochemical acetate production from high-pressure gaseous and liquid CO2 | - |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41929-023-01046-8 | - |
dc.identifier.scopus | eid_2-s2.0-85174492778 | - |
dc.identifier.eissn | 2520-1158 | - |
dc.identifier.isi | WOS:001085944100001 | - |
dc.identifier.issnl | 2520-1158 | - |