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
dc.contributor.author | Rocha, Kleper de O. [UNESP] | |
dc.contributor.author | Macedo, Wagner C. [UNESP] | |
dc.contributor.author | Marques, Clélia M.P. | |
dc.contributor.author | Bueno, José M.C. | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.contributor.institution | Universidade Federal de São Carlos (UFSCar) | |
dc.date.accessioned | 2021-06-25T10:10:40Z | |
dc.date.available | 2021-06-25T10:10:40Z | |
dc.date.issued | 2021-01-16 | |
dc.description.abstract | Pt/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.affiliation | São Paulo State University (UNESP) Department of Chemistry Science Faculty Av. Eng. Luiz Edmundo Carrijo Coube, 14-01 | |
dc.description.affiliation | São Paulo State University (UNESP) Department of Physics | |
dc.description.affiliation | Federal University of São Carlos (UFSCar) Department of Chemistry, C.P. 676 | |
dc.description.affiliation | Federal University of São Carlos (UFSCar) Department of Chemical Engineering, C.P. 676 | |
dc.description.affiliationUnesp | São Paulo State University (UNESP) Department of Chemistry Science Faculty Av. Eng. Luiz Edmundo Carrijo Coube, 14-01 | |
dc.description.affiliationUnesp | São Paulo State University (UNESP) Department of Physics | |
dc.identifier | http://dx.doi.org/10.1016/j.ces.2020.115966 | |
dc.identifier.citation | Chemical Engineering Science, v. 229. | |
dc.identifier.doi | 10.1016/j.ces.2020.115966 | |
dc.identifier.issn | 0009-2509 | |
dc.identifier.scopus | 2-s2.0-85089001322 | |
dc.identifier.uri | http://hdl.handle.net/11449/205151 | |
dc.language.iso | eng | |
dc.relation.ispartof | Chemical Engineering Science | |
dc.source | Scopus | |
dc.subject | in situ XANES | |
dc.subject | Metal sintering | |
dc.subject | One-pot preparation | |
dc.subject | POM | |
dc.subject | Pt catalyst | |
dc.subject | Sol–gel | |
dc.title | 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 | en |
dc.type | Artigo |