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dc.contributor.author
Morales, Maria Roxana
dc.contributor.author
Lajaunie, Luc
dc.contributor.author
Calvino, José Juan
dc.contributor.author
Cauqui, Miguel Ángel
dc.contributor.author
Cadus, Luis Eduardo
dc.contributor.author
Hernández Garrido, Juan Carlos
dc.date.available
2021-12-09T14:20:00Z
dc.date.issued
2021-10-15
dc.identifier.citation
Morales, Maria Roxana; Lajaunie, Luc; Calvino, José Juan; Cauqui, Miguel Ángel; Cadus, Luis Eduardo; et al.; In-depth structural and analytical study of the washcoating layer of a Mn-Cu monolithic catalyst using STEM-FIB, EDX and EELS. Insights into stability under working conditions; Elsevier Science; Applied Surface Science; 563; 15-10-2021; 1-13
dc.identifier.issn
0169-4332
dc.identifier.uri
http://hdl.handle.net/11336/148485
dc.description.abstract
The texture, structure, composition, and electronic state of new and used monolithic Mn-Cu catalysts were studied. Characterisation was performed at different scales and spatial resolution by combining STEM-FIB and imaging techniques (STEM-HAADF) and spectroscopy (STEM-EDX and EELS of space resolution). A thickness of the alumina layer that varies between 1 and 2 µm was observed, while the thickness of the Mn-Cu catalyst layer varies linearly with the number of charges between 1 µm and 2 µm, for 1 and 2 charges, respectively. In both fresh and used catalysts, the migration of both phases was observed to a different extent, depending on the number of charges of the Mn-Cu phase. This was associated with the synthesis conditions or the catalytic behaviour in the combustion of the n -hexane. The STEM-EDX analyses showed a homogeneous distribution of Mn and Cu, with values like the theoretical one. At the nanoscale, the SR-EELS analyses detected the presence of nanometric patches with lower Cu content, chemically inhomogeneous with a higher Mn oxidation state than the rest of the material. The advanced characterisation techniques used in this work allowed the precise identification of part of the constitutive phases of the Mn-Cu system generated in-situ on the monolith. Among them, manganese oxides with different oxidation states (MnO, Mn3O4, Mn2O3), Mn3Cu3O8 and CuO were detected.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MN-CU MONOLITHIC CATALYST
dc.subject
N-HEXANE COMBUSTION
dc.subject
SR-EELS
dc.subject
STEM-EDX
dc.subject
STEM-FIB
dc.subject.classification
Otras Ingeniería Química
dc.subject.classification
Ingeniería Química
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
In-depth structural and analytical study of the washcoating layer of a Mn-Cu monolithic catalyst using STEM-FIB, EDX and EELS. Insights into stability under working conditions
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-12-01T13:53:45Z
dc.identifier.eissn
1873-5584
dc.journal.volume
563
dc.journal.pagination
1-13
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Morales, Maria Roxana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Investigaciones en Tecnología Química. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Investigaciones en Tecnología Química; Argentina
dc.description.fil
Fil: Lajaunie, Luc. Universidad de Cádiz; España
dc.description.fil
Fil: Calvino, José Juan. Universidad de Cádiz; España
dc.description.fil
Fil: Cauqui, Miguel Ángel. Universidad de Cádiz; España
dc.description.fil
Fil: Cadus, Luis Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Investigaciones en Tecnología Química. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Investigaciones en Tecnología Química; Argentina
dc.description.fil
Fil: Hernández Garrido, Juan Carlos. Universidad de Cádiz; España
dc.journal.title
Applied Surface Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0169433221013933
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.apsusc.2021.150318
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