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Article: Electroreduction of CO2to Formate on a Copper-Based Electrocatalyst at High Pressures with High Energy Conversion Efficiency

TitleElectroreduction of CO<inf>2</inf>to Formate on a Copper-Based Electrocatalyst at High Pressures with High Energy Conversion Efficiency
Authors
Issue Date2020
Citation
Journal of the American Chemical Society, 2020, v. 142, n. 16, p. 7276-7282 How to Cite?
AbstractElectrocatalytic CO2 reduction (CO2RR) to valuable fuels is a promising approach to mitigate energy and environmental problems, but controlling the reaction pathways and products remains challenging. Here a novel Cu2O nanoparticle film was synthesized by square-wave (SW) electrochemical redox cycling of high-purity Cu foils. The cathode afforded up to 98% Faradaic efficiency for electroreduction of CO2 to nearly pure formate under ≥45 atm CO2 in bicarbonate catholytes. When this cathode was paired with a newly developed NiFe hydroxide carbonate anode in KOH/borate anolyte, the resulting two-electrode high-pressure electrolysis cell achieved high energy conversion efficiencies of up to 55.8% stably for long-term formate production. While the high-pressure conditions drastically increased the solubility of CO2 to enhance CO2 reduction and suppress hydrogen evolution, the (111)-oriented Cu2O film was found to be important to afford nearly 100% CO2 reduction to formate. The results have implications for CO2 reduction to a single liquid product with high energy conversion efficiency.
Persistent Identifierhttp://hdl.handle.net/10722/334673
ISSN
2023 Impact Factor: 14.4
2023 SCImago Journal Rankings: 5.489
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Jiachen-
dc.contributor.authorKuang, Yun-
dc.contributor.authorMeng, Yongtao-
dc.contributor.authorTian, Xin-
dc.contributor.authorHung, Wei Hsuan-
dc.contributor.authorZhang, Xiao-
dc.contributor.authorLi, Aowen-
dc.contributor.authorXu, Mingquan-
dc.contributor.authorZhou, Wu-
dc.contributor.authorKu, Ching Shun-
dc.contributor.authorChiang, Ching Yu-
dc.contributor.authorZhu, Guanzhou-
dc.contributor.authorGuo, Jinyu-
dc.contributor.authorSun, Xiaoming-
dc.contributor.authorDai, Hongjie-
dc.date.accessioned2023-10-20T06:49:49Z-
dc.date.available2023-10-20T06:49:49Z-
dc.date.issued2020-
dc.identifier.citationJournal of the American Chemical Society, 2020, v. 142, n. 16, p. 7276-7282-
dc.identifier.issn0002-7863-
dc.identifier.urihttp://hdl.handle.net/10722/334673-
dc.description.abstractElectrocatalytic CO2 reduction (CO2RR) to valuable fuels is a promising approach to mitigate energy and environmental problems, but controlling the reaction pathways and products remains challenging. Here a novel Cu2O nanoparticle film was synthesized by square-wave (SW) electrochemical redox cycling of high-purity Cu foils. The cathode afforded up to 98% Faradaic efficiency for electroreduction of CO2 to nearly pure formate under ≥45 atm CO2 in bicarbonate catholytes. When this cathode was paired with a newly developed NiFe hydroxide carbonate anode in KOH/borate anolyte, the resulting two-electrode high-pressure electrolysis cell achieved high energy conversion efficiencies of up to 55.8% stably for long-term formate production. While the high-pressure conditions drastically increased the solubility of CO2 to enhance CO2 reduction and suppress hydrogen evolution, the (111)-oriented Cu2O film was found to be important to afford nearly 100% CO2 reduction to formate. The results have implications for CO2 reduction to a single liquid product with high energy conversion efficiency.-
dc.languageeng-
dc.relation.ispartofJournal of the American Chemical Society-
dc.titleElectroreduction of CO<inf>2</inf>to Formate on a Copper-Based Electrocatalyst at High Pressures with High Energy Conversion Efficiency-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/jacs.0c00122-
dc.identifier.scopuseid_2-s2.0-85088936360-
dc.identifier.volume142-
dc.identifier.issue16-
dc.identifier.spage7276-
dc.identifier.epage7282-
dc.identifier.eissn1520-5126-
dc.identifier.isiWOS:000529156100007-

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