Pt/Al2O3La2O3 catalysts stable at high temperature in air, prepared using a “one-pot” sol–gel process: Synthesis, characterization, and catalytic activity in the partial oxidation of CH4

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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.creatorRocha, Kleper de O. [UNESP]-
Autor(es): dc.creatorMacedo, Wagner C. [UNESP]-
Autor(es): dc.creatorMarques, Clélia M.P.-
Autor(es): dc.creatorBueno, José M.C.-
Data de aceite: dc.date.accessioned2022-02-22T00:43:34Z-
Data de disponibilização: dc.date.available2022-02-22T00:43:34Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-01-15-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.ces.2020.115966-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/205151-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/205151-
Descrição: dc.descriptionPt/Al2O3La2O3 catalysts were prepared by a “one-pot” sol–gel method, with different final synthesis temperatures. The catalysts were characterized by in situ X-ray absorption spectroscopy (XAS). The partial oxidation of methane (POM) reaction was used to evaluate catalyst stability. DRIFTS-CO analysis indicated the interaction of Pt with the support by Pt-O-(Al-O, La-O) bonds, which suppressed bridge CO adsorption. In situ POM-DXAS-MS analysis showed that after use in the POM reaction at about 1000 K and cooling to room temperature, the Pt/Al2O3La2O3 catalysts presented partial oxidation of Pt0, indicating the formation of a core–shell structure. The nanoparticles generated using the “one-pot” method showed higher Pt-O-Al type interaction with the support, relative to free Pt-O at the surface, resulting in high resistance to sintering in the POM reaction. The temperature used in the “one-pot” synthesis significantly influenced the Pt-O-Al interaction, which modified the resistance to sintering at 1073 K in air.-
Descrição: dc.descriptionSão Paulo State University (UNESP) Department of Chemistry Science Faculty Av. Eng. Luiz Edmundo Carrijo Coube, 14-01-
Descrição: dc.descriptionSão Paulo State University (UNESP) Department of Physics-
Descrição: dc.descriptionFederal University of São Carlos (UFSCar) Department of Chemistry, C.P. 676-
Descrição: dc.descriptionFederal University of São Carlos (UFSCar) Department of Chemical Engineering, C.P. 676-
Descrição: dc.descriptionSão Paulo State University (UNESP) Department of Chemistry Science Faculty Av. Eng. Luiz Edmundo Carrijo Coube, 14-01-
Descrição: dc.descriptionSão Paulo State University (UNESP) Department of Physics-
Idioma: dc.languageen-
Relação: dc.relationChemical Engineering Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectin situ XANES-
Palavras-chave: dc.subjectMetal sintering-
Palavras-chave: dc.subjectOne-pot preparation-
Palavras-chave: dc.subjectPOM-
Palavras-chave: dc.subjectPt catalyst-
Palavras-chave: dc.subjectSol–gel-
Título: dc.titlePt/Al2O3La2O3 catalysts stable at high temperature in air, prepared using a “one-pot” sol–gel process: Synthesis, characterization, and catalytic activity in the partial oxidation of CH4-
Tipo de arquivo: dc.typelivro digital-
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