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Protic Imidazolium Ionic Liquids for Electroreduction of CO2

2026-08Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
datacite.subject.fosEngenharia e Tecnologia::Outras Engenharias e Tecnologias
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
datacite.subject.sdg13:Ação Climática
dc.contributor.authorMessias, Sofia
dc.contributor.authorPaninho, A. B.
dc.contributor.authorPires, Carolina
dc.contributor.authorRangel, Carmen M.
dc.contributor.authorMartins, Rodrigo
dc.contributor.authorMendes, Manuel Joao
dc.contributor.authorBranco, Luis
dc.contributor.authorMachado, Ana
dc.date.accessioned2026-10-07T13:57:40Z
dc.date.available2026-10-07T13:57:40Z
dc.date.issued2026-08
dc.description.abstractABSTRACT: Protic ionic liquids characterized by permutable protons have important applications in electrochemistry. This work represents an unprecedented report of the use of such electrolytes for CO2 electroreduction (ECR) into CO at 10 bar and near room temperature (45 degrees C) on zinc electrodes. It was observed that when protic ILs are synthesized from strong acids, the competition with the hydrogen evolution reaction increases. In contrast, the use of softer acids in the synthesis significantly enhances CO production. Imidazolium-based protic ILs were chosen due to their known high CO2 solubility and consequently their potential to increase reaction productivity. The electrolytes were electrochemically characterized, their conductivities and diffusion coefficients were determined, and their performance was compared. Despite the aqueous nature of the electrolyte, remarkably, 100% Faradaic efficiencies were obtained with [HMIM][Lac] containing 50 wt % water. The performance of the aqueous protic 50 wt % [HMIM][Lac] electrolyte surpassed the performance of the non-protic 50 wt % [EMIM][OTf] electrolyte. Furthermore, among the investigated water concentrations, the maximum CO production for the protic 50 wt % [HMIM][Lac] (177 & micro;mol/cm2) is of the same order as the magnitude of 90 wt % [EMIM][OTf] (271 & micro;mol/cm2), an almost pure IL, more expensive, and less sustainable electrolyte. The non-fluorinated bio-based lactate anion concurs to the higher sustainability of the process. Hydrophilic protic ILs are thus promising as electrolytes for ECR.eng
dc.identifier.citationMessias, S., Paninho, A., Pires, C., Rangel, C., Martins, R., Mendes, M., Branco, L., & Machado, A. (2026). Protic Imidazolium Ionic Liquids for Electroreduction of CO2. In: ACS Sustainable Chemistry & Engineering, 2026, vol.14 (34), pp. 15387-15396. https://doi.org/10.1021/acssuschemeng.6c06152
dc.identifier.doi10.1021/acssuschemeng.6c06152
dc.identifier.issn2168-0485
dc.identifier.urihttp://hdl.handle.net/10400.9/6503
dc.language.isoeng
dc.peerreviewedyes
dc.publisherAmerican Chemical Society
dc.relationInstitute of Nanostructures, Nanomodelling and Nanofabrication
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.relationUnderstanding CO2 electro-reduction in porous materials
dc.relationPower-to-X: STREAMing Hydrogen from 3-Band Solar Cells boosted with Photonic Management
dc.relationSustainable Strategies for Solar Electrochemical Reduction of Carbon Dioxide to Fuels
dc.relation.hasversionhttps://pubs.acs.org/ascecg/article/14/34/15387/5249709/Protic-Imidazolium-Ionic-Liquids-for
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectIonic liquids
dc.subjectElectrochemical reduction
dc.subjectCarbon dioxide
dc.subjectCarbon capture
dc.subjectElectrolytes
dc.subjectSyngas
dc.titleProtic Imidazolium Ionic Liquids for Electroreduction of CO2eng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberLA/P/0037/2020
oaire.awardNumberLA/P/0008/2020
oaire.awardNumberPTDC/EQU-EPQ/2195/2021
oaire.awardNumber101124803
oaire.awardNumberSFRH/BD/147219/2019
oaire.awardTitleInstitute of Nanostructures, Nanomodelling and Nanofabrication
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardTitleUnderstanding CO2 electro-reduction in porous materials
oaire.awardTitlePower-to-X: STREAMing Hydrogen from 3-Band Solar Cells boosted with Photonic Management
oaire.awardTitleSustainable Strategies for Solar Electrochemical Reduction of Carbon Dioxide to Fuels
oaire.awardURIhttp://hdl.handle.net/10400.9/6092
oaire.awardURIhttp://hdl.handle.net/10400.9/6093
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FEQU-EPQ%2F2195%2F2021/PT
oaire.awardURIhttp://hdl.handle.net/10400.9/6090
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F147219%2F2019/PT
oaire.citation.endPage15396
oaire.citation.issue34
oaire.citation.startPage15387
oaire.citation.titleACS Sustainable Chemistry & Engineering
oaire.citation.volume14
oaire.fundingStreamConcurso para Atribuição do Estatuto e Financiamento de Laboratórios Associados (LA)
oaire.fundingStreamConcurso para Atribuição do Estatuto e Financiamento de Laboratórios Associados (LA)
oaire.fundingStream3599-PPCDT
oaire.fundingStreamHORIZON ERC Grants
oaire.fundingStreamOE
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMessias
person.familyNameRangel
person.familyNameMartins
person.familyNameMendes
person.familyNameBranco
person.familyNameMachado
person.givenNameSofia
person.givenNameCarmen M.
person.givenNameRodrigo
person.givenNameManuel Joao
person.givenNameLuis
person.givenNameAna
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person.identifier.orcid0000-0002-7432-8725
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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