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Formic Acid Dehydration Using Mechanochemically Prepared TiO2-Graphite Composites

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dc.contributor.authorYruela Garrido, Marta
dc.contributor.authorMartín Rodríguez, Nuria
dc.contributor.authorCastillejos López, Eva
dc.contributor.authorCampos Castellanos, Eduardo
dc.contributor.authorConesa, José María
dc.contributor.authorRodríguez Ramos, Inmaculada
dc.contributor.authorGuerrero Ruiz, Antonio R
dc.date.accessioned2025-02-10T17:52:26Z
dc.date.available2025-02-10T17:52:26Z
dc.date.issued2024-07-27
dc.descriptionThe registered version of this article, first published in ChemCatChem, is available online at the publisher's website: Wiley, https://doi.org/10.1002/cctc.202400897
dc.descriptionLa versión registrada de este artículo, publicado por primera vez en ChemCatChem, está disponible en línea en el sitio web del editor: Wiley, https://doi.org/10.1002/cctc.202400897
dc.description.abstractCommercial high surface area graphite (HSAG300) and commercial TiO2 were used to produce composite materials through a simple mechanochemical method involving milling and ultrasonic treatments. The acid and basic sites exposed on the surfaces of these materials were characterized by temperature-programmed desorption (TPD) of ammonia and carbon dioxide. The catalytic materials were tested in the dehydration reaction of formic acid to produce hydrogen-free CO. While HSAG300 is practically inactive under reaction conditions (continuous gas flow at temperatures in the range of 100–250 °C), all samples containing TiO2 are active, exhibiting high selectivity to CO without significant deactivation at moderate reaction temperatures. It is demonstrated that the presence of graphite in the catalysts enhances the specific catalytic activity of TiO2. Assuming that the dehydration reaction is catalyzed by acid sites on the TiO2 surfaces, a comparative evaluation of the surface sites reveals that the graphite-TiO2 interactions not only change the density of surface sites but also modify the strength of the acid centers of TiO2. In summary, the interaction of HSAG300 with TiO2 modulates the surface properties of the prepared composite catalysts, decreasing the total number of basic surface sites and increasing the strength of acidic sites compared to bare TiO2.en
dc.description.versionversión publicada
dc.identifier.citationM. Yruela-Garrido, N. Martín-Rodríguez, E. Castillejos, E. Campos-Castellanos, J. M. Conesa, I. Rodríguez-Ramos, A. Guerrero-Ruiz, ChemCatChem 2024, 16, e202400897. https://doi.org/10.1002/cctc.202400897
dc.identifier.doihttps://doi.org/10.1002/cctc.202400897
dc.identifier.issn1867-3899
dc.identifier.urihttps://hdl.handle.net/20.500.14468/25879
dc.journal.issue16
dc.journal.titleChemCatChem
dc.language.isoen
dc.publisherWiley
dc.relation.centerFacultades y escuelas::Facultad de Ciencias
dc.relation.departmentQuímica Inorgánica y Química Técnica
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.es
dc.subject23 Química
dc.subject.keywordsformic aciden
dc.subject.keywordsdehydrationen
dc.subject.keywordscarbon dioxide TPDen
dc.subject.keywordsTiO2 catalystsen
dc.subject.keywordsgraphite supporten
dc.titleFormic Acid Dehydration Using Mechanochemically Prepared TiO2-Graphite Compositesen
dc.typeartículoes
dc.typejournal articleen
dspace.entity.typePublication
relation.isAuthorOfPublicationdee0d46d-b5de-4894-b408-b28a7fefce5b
relation.isAuthorOfPublication4bac4f9b-3f25-4779-ae7e-3c35605c694e
relation.isAuthorOfPublicationcc207db8-3a2f-44eb-9e3f-01005f87485a
relation.isAuthorOfPublication.latestForDiscoverydee0d46d-b5de-4894-b408-b28a7fefce5b
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