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Solar-driven thermos-photocatalytic methanation over a structured RuO₂:TiO₂/SBA-15 nanocomposite at low temperature

2024Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.sdg03:Saúde de Qualidade
dc.contributor.authorPaulista, Larissa
dc.contributor.authorFerreira, A.
dc.contributor.authorCastanheira, B.
dc.contributor.authorMartins, Ramiro
dc.contributor.authorDolic, M.
dc.contributor.authorBoaventura, Rui
dc.contributor.authorVilar, Vitor
dc.contributor.authorSilva, Tânia
dc.date.accessioned2026-03-12T14:45:54Z
dc.date.available2026-03-12T14:45:54Z
dc.date.issued2024
dc.description.abstractA new hybrid catalyst composed of mesostructured silica SBA-15 functionalized with TiO2 and further loaded with RuO2 was developed to efficiently promote thermo-photocatalytic CO2 hydrogenation into methane at low temperatures. The catalytic activity was assessed with respect to TiO2:RuO2 loading, catalyst dosage, illumination source (polychromatic sunlight and monochromatic LEDs) and power, [H2]:[CO2] molar ratio, temperature, and catalyst reusability. The best methanation yields were attained for the RuO2(6.4%):TiO2(16.9%)/SBA-15 nanocomposite at 150 ºC, under simulated sunlight (0.21 W) and stoichiometric [H2]:[CO2] molar ratio, reaching: a specific CH4 production rate of 13.6 mmol gcat-1 h-1; 99.8 % selectivity; 96.8 % CO2 conversion (110-min; 40 mL); and apparent photonic efficiency/quantum yield of 39.5 %/42.1 %. Considering only the active RuO2:TiO2 photocatalyst mass (23.3 %), the CH4 production rate increased to 58.6 mmol gactive_cat-1 h-1. Besides, this highly-active photocatalyst featured excellent UV-Vis-IR light absorbance, high surface area, and stability for reuse when moist gas was removed between cycles.por
dc.identifier.citationPaulista, Larissa; Ferreira, A.; Castanheira, B.; Martins, Ramiro; Dolic, M.; Boaventura, Rui; Vilar, Vitor; Solar-driven thermos-photocatalytic methanation over a structured RuO₂:TiO₂/SBA-15 nanocomposite at low temperature. Applied Catalysis B: Environmental. ISSN 1873-3883. 340, p. 1-25. DOI: 10.1016/2023.123232
dc.identifier.doi10.1016/2023.123232
dc.identifier.issn1873-3883
dc.identifier.urihttp://hdl.handle.net/10198/36049
dc.language.isoeng
dc.peerreviewedyes
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectSolar-assisted CO2 hydrogenation
dc.subjectThermo-photocatalysis
dc.subjectRenewable methane production
dc.subjectRuO2:TiO2-functionalized SBA
dc.subjectOutstanding UV-Vis-IR light response
dc.titleSolar-driven thermos-photocatalytic methanation over a structured RuO₂:TiO₂/SBA-15 nanocomposite at low temperaturepor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage25
oaire.citation.startPage1
oaire.citation.titleApplied Catalysis B: Environmental
oaire.citation.volume340
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMartins
person.givenNameRamiro
person.identifier.ciencia-idEA17-F39C-29C7
person.identifier.orcid0000-0003-4327-7782
relation.isAuthorOfPublicationbf713e37-c17f-4a4e-8323-a7b770a038bf
relation.isAuthorOfPublication.latestForDiscoverybf713e37-c17f-4a4e-8323-a7b770a038bf

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