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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dc.contributor.authorRocha, Kleper de O. [UNESP]
dc.contributor.authorMacedo, Wagner C. [UNESP]
dc.contributor.authorMarques, Clélia M.P.
dc.contributor.authorBueno, José M.C.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2021-06-25T10:10:40Z
dc.date.available2021-06-25T10:10:40Z
dc.date.issued2021-01-16
dc.description.abstractPt/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.en
dc.description.affiliationSão Paulo State University (UNESP) Department of Chemistry Science Faculty Av. Eng. Luiz Edmundo Carrijo Coube, 14-01
dc.description.affiliationSão Paulo State University (UNESP) Department of Physics
dc.description.affiliationFederal University of São Carlos (UFSCar) Department of Chemistry, C.P. 676
dc.description.affiliationFederal University of São Carlos (UFSCar) Department of Chemical Engineering, C.P. 676
dc.description.affiliationUnespSão Paulo State University (UNESP) Department of Chemistry Science Faculty Av. Eng. Luiz Edmundo Carrijo Coube, 14-01
dc.description.affiliationUnespSão Paulo State University (UNESP) Department of Physics
dc.identifierhttp://dx.doi.org/10.1016/j.ces.2020.115966
dc.identifier.citationChemical Engineering Science, v. 229.
dc.identifier.doi10.1016/j.ces.2020.115966
dc.identifier.issn0009-2509
dc.identifier.scopus2-s2.0-85089001322
dc.identifier.urihttp://hdl.handle.net/11449/205151
dc.language.isoeng
dc.relation.ispartofChemical Engineering Science
dc.sourceScopus
dc.subjectin situ XANES
dc.subjectMetal sintering
dc.subjectOne-pot preparation
dc.subjectPOM
dc.subjectPt catalyst
dc.subjectSol–gel
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 CH4en
dc.typeArtigo

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