Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content

Autores
Benito, Patricia Virginia; Gregori, Manuel; Andreoli, Sara; Fornasari, Giuseppe; Ospitali, Francesca; Millefanti, Stefano; Avila, Maria Sol; Garetto, Teresita Francisca; Albonetti, Stefania
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Pd/Cu-MCM-41 catalysts for the hydrodechlorination of CF3OCFClCF2Cl to CF3OCFCF2 were prepared. Palladium- and copper-containing samples (Pd/Cu = 1 molar ratio) were synthesized by adding Pd2+ and Cu2+ during the formation of MCM-41, and then the slurries were aged by microwave-hydrothermal treatment. The effect of the silica source (silicates or TEOS) and total metal loading (2.4 and 4.0 wt.%) on the chemical–physical properties and catalytic performances was studied. Bimetallic silicate-derived samples show features similar to those of the pristine MCM-41, regardless of the total metal content. Conversely, the long-range order of the mesoporous structure decreases for TEOS-derived catalysts, and large metal contents seem to alter the structure for these materials. During template removal by thermal treatment, palladium and copper are on the surface of MCM-41 particles, forming Pd1−xCuxO solid solutions whose composition is silica source-dependent. The amount of copper in Pd1−xCuxO is greater for TEOS-derived samples. After reduction, both Pd- and Cu-enriched alloys were found by XRD in silicate-derived samples, while XPS measurements indicated that the surface of the catalyst is enriched with copper. XRD and XPS analyses on TEOS samples indicated that the surface Cu/Pd ratio is closer to 1, and fcc PdCu alloys with a high copper content were identified. The composition of metallic particles modifies the selectivity, TEOS-derived catalysts being more selective to the target CF3OCFCF2.
Fil: Benito, Patricia Virginia. Università di Bologna; Italia
Fil: Gregori, Manuel. Università di Bologna; Italia. R&D Centre. Solvay Specialty Polymers SpA; Italia
Fil: Andreoli, Sara. Università di Bologna; Italia
Fil: Fornasari, Giuseppe. Università di Bologna; Italia
Fil: Ospitali, Francesca. Università di Bologna; Italia
Fil: Millefanti, Stefano. R&D Centre. Solvay Specialty Polymers SpA; Italia
Fil: Avila, Maria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Garetto, Teresita Francisca. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Albonetti, Stefania. Università di Bologna; Italia
Materia
Palladium
Copper
Mcm-41
Silicate
Teos
Hydrodechlorination
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/30917
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/30917
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal contentBenito, Patricia VirginiaGregori, ManuelAndreoli, SaraFornasari, GiuseppeOspitali, FrancescaMillefanti, StefanoAvila, Maria SolGaretto, Teresita FranciscaAlbonetti, StefaniaPalladiumCopperMcm-41SilicateTeosHydrodechlorinationhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Pd/Cu-MCM-41 catalysts for the hydrodechlorination of CF3OCFClCF2Cl to CF3OCFCF2 were prepared. Palladium- and copper-containing samples (Pd/Cu = 1 molar ratio) were synthesized by adding Pd2+ and Cu2+ during the formation of MCM-41, and then the slurries were aged by microwave-hydrothermal treatment. The effect of the silica source (silicates or TEOS) and total metal loading (2.4 and 4.0 wt.%) on the chemical–physical properties and catalytic performances was studied. Bimetallic silicate-derived samples show features similar to those of the pristine MCM-41, regardless of the total metal content. Conversely, the long-range order of the mesoporous structure decreases for TEOS-derived catalysts, and large metal contents seem to alter the structure for these materials. During template removal by thermal treatment, palladium and copper are on the surface of MCM-41 particles, forming Pd1−xCuxO solid solutions whose composition is silica source-dependent. The amount of copper in Pd1−xCuxO is greater for TEOS-derived samples. After reduction, both Pd- and Cu-enriched alloys were found by XRD in silicate-derived samples, while XPS measurements indicated that the surface of the catalyst is enriched with copper. XRD and XPS analyses on TEOS samples indicated that the surface Cu/Pd ratio is closer to 1, and fcc PdCu alloys with a high copper content were identified. The composition of metallic particles modifies the selectivity, TEOS-derived catalysts being more selective to the target CF3OCFCF2.Fil: Benito, Patricia Virginia. Università di Bologna; ItaliaFil: Gregori, Manuel. Università di Bologna; Italia. R&D Centre. Solvay Specialty Polymers SpA; ItaliaFil: Andreoli, Sara. Università di Bologna; ItaliaFil: Fornasari, Giuseppe. Università di Bologna; ItaliaFil: Ospitali, Francesca. Università di Bologna; ItaliaFil: Millefanti, Stefano. R&D Centre. Solvay Specialty Polymers SpA; ItaliaFil: Avila, Maria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Garetto, Teresita Francisca. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Albonetti, Stefania. Università di Bologna; ItaliaElsevier2014-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/30917Albonetti, Stefania; Garetto, Teresita Francisca; Avila, Maria Sol; Millefanti, Stefano; Ospitali, Francesca; Fornasari, Giuseppe; et al.; Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content; Elsevier; Catalysis Today; 246; 9-2014; 108-1150920-5861CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0920586114006105info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2014.08.027info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:11:38Zoai:ri.conicet.gov.ar:11336/30917instacron: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:34982025-09-03 10:11:38.928CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content
title Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content
spellingShingle Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content
Benito, Patricia Virginia
Palladium
Copper
Mcm-41
Silicate
Teos
Hydrodechlorination
title_short Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content
title_full Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content
title_fullStr Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content
title_full_unstemmed Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content
title_sort Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content
dc.creator.none.fl_str_mv Benito, Patricia Virginia
Gregori, Manuel
Andreoli, Sara
Fornasari, Giuseppe
Ospitali, Francesca
Millefanti, Stefano
Avila, Maria Sol
Garetto, Teresita Francisca
Albonetti, Stefania
author Benito, Patricia Virginia
author_facet Benito, Patricia Virginia
Gregori, Manuel
Andreoli, Sara
Fornasari, Giuseppe
Ospitali, Francesca
Millefanti, Stefano
Avila, Maria Sol
Garetto, Teresita Francisca
Albonetti, Stefania
author_role author
author2 Gregori, Manuel
Andreoli, Sara
Fornasari, Giuseppe
Ospitali, Francesca
Millefanti, Stefano
Avila, Maria Sol
Garetto, Teresita Francisca
Albonetti, Stefania
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Palladium
Copper
Mcm-41
Silicate
Teos
Hydrodechlorination
topic Palladium
Copper
Mcm-41
Silicate
Teos
Hydrodechlorination
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Pd/Cu-MCM-41 catalysts for the hydrodechlorination of CF3OCFClCF2Cl to CF3OCFCF2 were prepared. Palladium- and copper-containing samples (Pd/Cu = 1 molar ratio) were synthesized by adding Pd2+ and Cu2+ during the formation of MCM-41, and then the slurries were aged by microwave-hydrothermal treatment. The effect of the silica source (silicates or TEOS) and total metal loading (2.4 and 4.0 wt.%) on the chemical–physical properties and catalytic performances was studied. Bimetallic silicate-derived samples show features similar to those of the pristine MCM-41, regardless of the total metal content. Conversely, the long-range order of the mesoporous structure decreases for TEOS-derived catalysts, and large metal contents seem to alter the structure for these materials. During template removal by thermal treatment, palladium and copper are on the surface of MCM-41 particles, forming Pd1−xCuxO solid solutions whose composition is silica source-dependent. The amount of copper in Pd1−xCuxO is greater for TEOS-derived samples. After reduction, both Pd- and Cu-enriched alloys were found by XRD in silicate-derived samples, while XPS measurements indicated that the surface of the catalyst is enriched with copper. XRD and XPS analyses on TEOS samples indicated that the surface Cu/Pd ratio is closer to 1, and fcc PdCu alloys with a high copper content were identified. The composition of metallic particles modifies the selectivity, TEOS-derived catalysts being more selective to the target CF3OCFCF2.
Fil: Benito, Patricia Virginia. Università di Bologna; Italia
Fil: Gregori, Manuel. Università di Bologna; Italia. R&D Centre. Solvay Specialty Polymers SpA; Italia
Fil: Andreoli, Sara. Università di Bologna; Italia
Fil: Fornasari, Giuseppe. Università di Bologna; Italia
Fil: Ospitali, Francesca. Università di Bologna; Italia
Fil: Millefanti, Stefano. R&D Centre. Solvay Specialty Polymers SpA; Italia
Fil: Avila, Maria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Garetto, Teresita Francisca. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Albonetti, Stefania. Università di Bologna; Italia
description Pd/Cu-MCM-41 catalysts for the hydrodechlorination of CF3OCFClCF2Cl to CF3OCFCF2 were prepared. Palladium- and copper-containing samples (Pd/Cu = 1 molar ratio) were synthesized by adding Pd2+ and Cu2+ during the formation of MCM-41, and then the slurries were aged by microwave-hydrothermal treatment. The effect of the silica source (silicates or TEOS) and total metal loading (2.4 and 4.0 wt.%) on the chemical–physical properties and catalytic performances was studied. Bimetallic silicate-derived samples show features similar to those of the pristine MCM-41, regardless of the total metal content. Conversely, the long-range order of the mesoporous structure decreases for TEOS-derived catalysts, and large metal contents seem to alter the structure for these materials. During template removal by thermal treatment, palladium and copper are on the surface of MCM-41 particles, forming Pd1−xCuxO solid solutions whose composition is silica source-dependent. The amount of copper in Pd1−xCuxO is greater for TEOS-derived samples. After reduction, both Pd- and Cu-enriched alloys were found by XRD in silicate-derived samples, while XPS measurements indicated that the surface of the catalyst is enriched with copper. XRD and XPS analyses on TEOS samples indicated that the surface Cu/Pd ratio is closer to 1, and fcc PdCu alloys with a high copper content were identified. The composition of metallic particles modifies the selectivity, TEOS-derived catalysts being more selective to the target CF3OCFCF2.
publishDate 2014
dc.date.none.fl_str_mv 2014-09
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/11336/30917
Albonetti, Stefania; Garetto, Teresita Francisca; Avila, Maria Sol; Millefanti, Stefano; Ospitali, Francesca; Fornasari, Giuseppe; et al.; Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content; Elsevier; Catalysis Today; 246; 9-2014; 108-115
0920-5861
CONICET Digital
CONICET
url http://hdl.handle.net/11336/30917
identifier_str_mv Albonetti, Stefania; Garetto, Teresita Francisca; Avila, Maria Sol; Millefanti, Stefano; Ospitali, Francesca; Fornasari, Giuseppe; et al.; Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content; Elsevier; Catalysis Today; 246; 9-2014; 108-115
0920-5861
CONICET Digital
CONICET
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/S0920586114006105
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2014.08.027
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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 13.13397

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