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

Detalhes bibliográficos
Autor(a) principal: Rocha, Kleper de O. [UNESP]
Data de Publicação: 2021
Outros Autores: Macedo, Wagner C. [UNESP], Marques, Clélia M.P., Bueno, José M.C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.ces.2020.115966
http://hdl.handle.net/11449/205151
Resumo: 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.
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spelling 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 CH4in situ XANESMetal sinteringOne-pot preparationPOMPt catalystSol–gelPt/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.São Paulo State University (UNESP) Department of Chemistry Science Faculty Av. Eng. Luiz Edmundo Carrijo Coube, 14-01São Paulo State University (UNESP) Department of PhysicsFederal University of São Carlos (UFSCar) Department of Chemistry, C.P. 676Federal University of São Carlos (UFSCar) Department of Chemical Engineering, C.P. 676São Paulo State University (UNESP) Department of Chemistry Science Faculty Av. Eng. Luiz Edmundo Carrijo Coube, 14-01São Paulo State University (UNESP) Department of PhysicsUniversidade Estadual Paulista (Unesp)Universidade Federal de São Carlos (UFSCar)Rocha, Kleper de O. [UNESP]Macedo, Wagner C. [UNESP]Marques, Clélia M.P.Bueno, José M.C.2021-06-25T10:10:40Z2021-06-25T10:10:40Z2021-01-16info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.ces.2020.115966Chemical Engineering Science, v. 229.0009-2509http://hdl.handle.net/11449/20515110.1016/j.ces.2020.1159662-s2.0-85089001322Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengChemical Engineering Scienceinfo:eu-repo/semantics/openAccess2021-10-23T10:49:04Zoai:repositorio.unesp.br:11449/205151Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:52:25.334279Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv 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
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
spellingShingle 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
Rocha, Kleper de O. [UNESP]
in situ XANES
Metal sintering
One-pot preparation
POM
Pt catalyst
Sol–gel
title_short 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
title_full 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
title_fullStr 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
title_full_unstemmed 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
title_sort 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
author Rocha, Kleper de O. [UNESP]
author_facet Rocha, Kleper de O. [UNESP]
Macedo, Wagner C. [UNESP]
Marques, Clélia M.P.
Bueno, José M.C.
author_role author
author2 Macedo, Wagner C. [UNESP]
Marques, Clélia M.P.
Bueno, José M.C.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade Federal de São Carlos (UFSCar)
dc.contributor.author.fl_str_mv Rocha, Kleper de O. [UNESP]
Macedo, Wagner C. [UNESP]
Marques, Clélia M.P.
Bueno, José M.C.
dc.subject.por.fl_str_mv in situ XANES
Metal sintering
One-pot preparation
POM
Pt catalyst
Sol–gel
topic in situ XANES
Metal sintering
One-pot preparation
POM
Pt catalyst
Sol–gel
description 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.
publishDate 2021
dc.date.none.fl_str_mv 2021-06-25T10:10:40Z
2021-06-25T10:10:40Z
2021-01-16
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.ces.2020.115966
Chemical Engineering Science, v. 229.
0009-2509
http://hdl.handle.net/11449/205151
10.1016/j.ces.2020.115966
2-s2.0-85089001322
url http://dx.doi.org/10.1016/j.ces.2020.115966
http://hdl.handle.net/11449/205151
identifier_str_mv Chemical Engineering Science, v. 229.
0009-2509
10.1016/j.ces.2020.115966
2-s2.0-85089001322
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Chemical Engineering Science
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808129368177770496

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