Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation

Autores
Meher, Sumanta Kumar; Cargnello, Matteo; Troiani, Horacio Esteban; Montini, T.; Ranga Rao, G.; Fornasiero, Paolo
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Controlling the structures of supports and supported phases is important for catalytic applications where synergic effects can play a main role. In this context, we present versatile methods for suitable microstructurization of CeO2 support and improved dispersion of supported Pt crystallites in a Pt/CeO2 system for enhanced catalytic oxidation of CO. The physicochemical properties investigated using SEM, BET, visible Raman, H2-TPR and OSC measurements demonstrated the important role played by the precursor on the properties of CeO2. Further, 0.5 wt% Pt deposited over CeO2 via ethylene glycol assisted reduction (EGR) was found to be more advantageous than conventional impregnation (IMP) in producing very finely dispersed Pt particles that did not noticeably sinter even after thermal treatment at 500 ◦C for longer duration. H2-chemisorption and H2-TPR experiments further substantiated better Pt dispersion on CeO2 prepared in the presence of Cl− ions regardless of the method employed, thus suggesting a strong microstructural effect of support during growth and anti-sintering activity of Pt crystallites. The CO oxidation activity additionally demonstrates that samples prepared by EGR method show remarkably better performance (100% conversion in <100 ◦C) as compared to their impregnated counterparts (100% conversion at ∼300 ◦C). The present approach to improve the catalytic activity of Pt/CeO2 based heteronanocomposites by finely dispersing low concentrations of Pt nanocrystallites over microstructurally tuned CeO2 support is encouraging in the context of designing novel metal–metal oxide based catalysts for astute potential applicability under vibrantly testing conditions.
Fil: Meher, Sumanta Kumar. Indian Institute of Technology Madras. Department of Chemistry; India
Fil: Cargnello, Matteo. Universita Degli Studi Di Trieste; Italia
Fil: Troiani, Horacio Esteban. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina
Fil: Montini, T.. Universita Degli Studi Di Trieste; Italia
Fil: Ranga Rao, G.. Indian Institute of Technology Madras. Department of Chemistry; India
Fil: Fornasiero, Paolo. Universita Degli Studi Di Trieste; Italia
Materia
Ceo2
Surface Morphology
Alcohol Reduction
Pt Dispersion
Co Oxidation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/8912
Acceder
id CONICETDig_3872cdb93f481e1d33c04141da232905
oai_identifier_str oai:ri.conicet.gov.ar:11336/8912
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidationMeher, Sumanta KumarCargnello, MatteoTroiani, Horacio EstebanMontini, T.Ranga Rao, G.Fornasiero, PaoloCeo2Surface MorphologyAlcohol ReductionPt DispersionCo Oxidationhttps://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2Controlling the structures of supports and supported phases is important for catalytic applications where synergic effects can play a main role. In this context, we present versatile methods for suitable microstructurization of CeO2 support and improved dispersion of supported Pt crystallites in a Pt/CeO2 system for enhanced catalytic oxidation of CO. The physicochemical properties investigated using SEM, BET, visible Raman, H2-TPR and OSC measurements demonstrated the important role played by the precursor on the properties of CeO2. Further, 0.5 wt% Pt deposited over CeO2 via ethylene glycol assisted reduction (EGR) was found to be more advantageous than conventional impregnation (IMP) in producing very finely dispersed Pt particles that did not noticeably sinter even after thermal treatment at 500 ◦C for longer duration. H2-chemisorption and H2-TPR experiments further substantiated better Pt dispersion on CeO2 prepared in the presence of Cl− ions regardless of the method employed, thus suggesting a strong microstructural effect of support during growth and anti-sintering activity of Pt crystallites. The CO oxidation activity additionally demonstrates that samples prepared by EGR method show remarkably better performance (100% conversion in <100 ◦C) as compared to their impregnated counterparts (100% conversion at ∼300 ◦C). The present approach to improve the catalytic activity of Pt/CeO2 based heteronanocomposites by finely dispersing low concentrations of Pt nanocrystallites over microstructurally tuned CeO2 support is encouraging in the context of designing novel metal–metal oxide based catalysts for astute potential applicability under vibrantly testing conditions.Fil: Meher, Sumanta Kumar. Indian Institute of Technology Madras. Department of Chemistry; IndiaFil: Cargnello, Matteo. Universita Degli Studi Di Trieste; ItaliaFil: Troiani, Horacio Esteban. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; ArgentinaFil: Montini, T.. Universita Degli Studi Di Trieste; ItaliaFil: Ranga Rao, G.. Indian Institute of Technology Madras. Department of Chemistry; IndiaFil: Fornasiero, Paolo. Universita Degli Studi Di Trieste; ItaliaElsevier Science2013-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/8912Meher, Sumanta Kumar; Cargnello, Matteo; Troiani, Horacio Esteban; Montini, T.; Ranga Rao, G.; et al.; Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation; Elsevier Science; Applied Catalysis B: Environmental; 130-31; 2-2013; 121-1310926-3373enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0926337312004900info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcatb.2012.10.022info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-29T12:33:30Zoai:ri.conicet.gov.ar:11336/8912instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-29 12:33:30.516CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation
title Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation
spellingShingle Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation
Meher, Sumanta Kumar
Ceo2
Surface Morphology
Alcohol Reduction
Pt Dispersion
Co Oxidation
title_short Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation
title_full Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation
title_fullStr Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation
title_full_unstemmed Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation
title_sort Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation
dc.creator.none.fl_str_mv Meher, Sumanta Kumar
Cargnello, Matteo
Troiani, Horacio Esteban
Montini, T.
Ranga Rao, G.
Fornasiero, Paolo
author Meher, Sumanta Kumar
author_facet Meher, Sumanta Kumar
Cargnello, Matteo
Troiani, Horacio Esteban
Montini, T.
Ranga Rao, G.
Fornasiero, Paolo
author_role author
author2 Cargnello, Matteo
Troiani, Horacio Esteban
Montini, T.
Ranga Rao, G.
Fornasiero, Paolo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ceo2
Surface Morphology
Alcohol Reduction
Pt Dispersion
Co Oxidation
topic Ceo2
Surface Morphology
Alcohol Reduction
Pt Dispersion
Co Oxidation
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.10
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Controlling the structures of supports and supported phases is important for catalytic applications where synergic effects can play a main role. In this context, we present versatile methods for suitable microstructurization of CeO2 support and improved dispersion of supported Pt crystallites in a Pt/CeO2 system for enhanced catalytic oxidation of CO. The physicochemical properties investigated using SEM, BET, visible Raman, H2-TPR and OSC measurements demonstrated the important role played by the precursor on the properties of CeO2. Further, 0.5 wt% Pt deposited over CeO2 via ethylene glycol assisted reduction (EGR) was found to be more advantageous than conventional impregnation (IMP) in producing very finely dispersed Pt particles that did not noticeably sinter even after thermal treatment at 500 ◦C for longer duration. H2-chemisorption and H2-TPR experiments further substantiated better Pt dispersion on CeO2 prepared in the presence of Cl− ions regardless of the method employed, thus suggesting a strong microstructural effect of support during growth and anti-sintering activity of Pt crystallites. The CO oxidation activity additionally demonstrates that samples prepared by EGR method show remarkably better performance (100% conversion in <100 ◦C) as compared to their impregnated counterparts (100% conversion at ∼300 ◦C). The present approach to improve the catalytic activity of Pt/CeO2 based heteronanocomposites by finely dispersing low concentrations of Pt nanocrystallites over microstructurally tuned CeO2 support is encouraging in the context of designing novel metal–metal oxide based catalysts for astute potential applicability under vibrantly testing conditions.
Fil: Meher, Sumanta Kumar. Indian Institute of Technology Madras. Department of Chemistry; India
Fil: Cargnello, Matteo. Universita Degli Studi Di Trieste; Italia
Fil: Troiani, Horacio Esteban. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina
Fil: Montini, T.. Universita Degli Studi Di Trieste; Italia
Fil: Ranga Rao, G.. Indian Institute of Technology Madras. Department of Chemistry; India
Fil: Fornasiero, Paolo. Universita Degli Studi Di Trieste; Italia
description Controlling the structures of supports and supported phases is important for catalytic applications where synergic effects can play a main role. In this context, we present versatile methods for suitable microstructurization of CeO2 support and improved dispersion of supported Pt crystallites in a Pt/CeO2 system for enhanced catalytic oxidation of CO. The physicochemical properties investigated using SEM, BET, visible Raman, H2-TPR and OSC measurements demonstrated the important role played by the precursor on the properties of CeO2. Further, 0.5 wt% Pt deposited over CeO2 via ethylene glycol assisted reduction (EGR) was found to be more advantageous than conventional impregnation (IMP) in producing very finely dispersed Pt particles that did not noticeably sinter even after thermal treatment at 500 ◦C for longer duration. H2-chemisorption and H2-TPR experiments further substantiated better Pt dispersion on CeO2 prepared in the presence of Cl− ions regardless of the method employed, thus suggesting a strong microstructural effect of support during growth and anti-sintering activity of Pt crystallites. The CO oxidation activity additionally demonstrates that samples prepared by EGR method show remarkably better performance (100% conversion in <100 ◦C) as compared to their impregnated counterparts (100% conversion at ∼300 ◦C). The present approach to improve the catalytic activity of Pt/CeO2 based heteronanocomposites by finely dispersing low concentrations of Pt nanocrystallites over microstructurally tuned CeO2 support is encouraging in the context of designing novel metal–metal oxide based catalysts for astute potential applicability under vibrantly testing conditions.
publishDate 2013
dc.date.none.fl_str_mv 2013-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/8912
Meher, Sumanta Kumar; Cargnello, Matteo; Troiani, Horacio Esteban; Montini, T.; Ranga Rao, G.; et al.; Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation; Elsevier Science; Applied Catalysis B: Environmental; 130-31; 2-2013; 121-131
0926-3373
url http://hdl.handle.net/11336/8912
identifier_str_mv Meher, Sumanta Kumar; Cargnello, Matteo; Troiani, Horacio Esteban; Montini, T.; Ranga Rao, G.; et al.; Alcohol induced ultra-fine dispersion of Pt on tuned morphologies of CeO2 for CO oxidation; Elsevier Science; Applied Catalysis B: Environmental; 130-31; 2-2013; 121-131
0926-3373
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0926337312004900
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcatb.2012.10.022
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.10058

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