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dc.contributor.author
Barrios, Celina
dc.contributor.author
Baltanas, Miguel Angel
dc.contributor.author
Bolmaro, Raul Eduardo
dc.contributor.author
Bonivardi, Adrian Lionel
dc.date.available
2016-07-07T20:47:13Z
dc.date.issued
2014-07
dc.identifier.citation
Barrios, Celina; Baltanas, Miguel Angel; Bolmaro, Raul Eduardo; Bonivardi, Adrian Lionel; Preparation and structural characterization of Zn and CeO2 nanocomposite materials as catalytic supports; Elsevier; Powder Technology; 267; 7-2014; 180-192
dc.identifier.issn
0032-5910
dc.identifier.uri
http://hdl.handle.net/11336/6413
dc.description.abstract
Cerium(IV) and zinc(II) oxide nanocomposite powders (Zn-to-Ce atomic ratio between 0.5 and 2) as well as the pure oxideswere prepared by co-precipitation of cerium(III) and zinc(II) cations with oxalate (OC) or carbonate anions (CC), as active catalytic supports for the steamreforming of methanol (SRM) reaction. After the study of the decomposition of the precipitates in oxidizing atmosphere by thermogravimetry, differential scanning calorimetry, temperature-programmed oxidation (using infrared and mass spectrometry) and X-ray diffraction, a global reaction pathway for the decomposition of each type of precipitateswas proposed. The nanostructural characterization of the calcined composites at 723 Kwas followed by refined XRD analysis. Itwas possible to conclude that Zn(II) was not incorporated into the ceria lattice in any case. The size of the CeO2 crystals was rather constant (~10?15 nm) in all the ZnO?CeO2 nanocomposite powders, just as in the pure ceria (13?14 nm). Instead, the crystalline domains of ZnO were smaller in the nanocomposites than in pure zinc oxide (31?78 vs. 103? 118 nm, respectively), and even smaller in the CC than in the OC materials (31?38 vs. 57?78 nm for CC vs. OC, respectively). Upon the incorporation of palladiumto the oxides, to provide the metallic function on the catalysts, the carbonate-derived composites showed a better catalytic performance for the SRM reaction. Said improvement (in terms of percent selectivity to CO2) could be attributed to the improved dispersion of zinc oxide achieved on the CC nanocomposites.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Nanocomposite Powders
dc.subject
Active Catalytic Supports
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Zinc Oxide
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Cerium Oxide
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Palladium
dc.subject
Hydrogen Production
dc.subject.classification
Física de los Materiales Condensados
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Preparation and structural characterization of Zn and CeO2 nanocomposite materials as catalytic supports
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-06-10T18:39:50Z
dc.journal.volume
267
dc.journal.pagination
180-192
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Barrios, Celina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
dc.description.fil
Fil: Baltanas, Miguel Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
dc.description.fil
Fil: Bolmaro, Raul Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina
dc.description.fil
Fil: Bonivardi, Adrian Lionel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
dc.journal.title
Powder Technology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0032591014006160
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.powtec.2014.07.006
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.powtec.2014.07.006


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