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dc.contributor.author
Benito, Patricia Virginia
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dc.contributor.author
Gregori, Manuel
dc.contributor.author
Andreoli, Sara
dc.contributor.author
Fornasari, Giuseppe
dc.contributor.author
Ospitali, Francesca
dc.contributor.author
Millefanti, Stefano
dc.contributor.author
Avila, Maria Sol
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dc.contributor.author
Garetto, Teresita Francisca
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dc.contributor.author
Albonetti, Stefania
dc.date.available
2017-12-18T19:05:08Z
dc.date.issued
2014-09
dc.identifier.citation
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
dc.identifier.issn
0920-5861
dc.identifier.uri
http://hdl.handle.net/11336/30917
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Palladium
dc.subject
Copper
dc.subject
Mcm-41
dc.subject
Silicate
dc.subject
Teos
dc.subject
Hydrodechlorination
dc.subject.classification
Recubrimientos y Películas
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dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Pd–Cu interaction in Pd/Cu-MCM-41 catalysts: Effect of silica source and metal content
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-12-18T15:02:11Z
dc.journal.volume
246
dc.journal.pagination
108-115
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Ámsterdam
dc.description.fil
Fil: Benito, Patricia Virginia. Università di Bologna; Italia
dc.description.fil
Fil: Gregori, Manuel. Università di Bologna; Italia. R&D Centre. Solvay Specialty Polymers SpA; Italia
dc.description.fil
Fil: Andreoli, Sara. Università di Bologna; Italia
dc.description.fil
Fil: Fornasari, Giuseppe. Università di Bologna; Italia
dc.description.fil
Fil: Ospitali, Francesca. Università di Bologna; Italia
dc.description.fil
Fil: Millefanti, Stefano. R&D Centre. Solvay Specialty Polymers SpA; Italia
dc.description.fil
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
dc.description.fil
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
dc.description.fil
Fil: Albonetti, Stefania. Università di Bologna; Italia
dc.journal.title
Catalysis Today
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0920586114006105
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.cattod.2014.08.027
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