dc.creatorFigueroa, Santiago Jose Alejandro
dc.creatorRequejo, Felix Gregorio
dc.creatorLede, Eduardo Javier
dc.creatorLamaita, Luciano
dc.creatorPeluso, Miguel Andrés
dc.creatorSambeth, Jorge Enrique
dc.date.accessioned2018-08-28T18:28:45Z
dc.date.accessioned2018-11-06T15:18:26Z
dc.date.available2018-08-28T18:28:45Z
dc.date.available2018-11-06T15:18:26Z
dc.date.created2018-08-28T18:28:45Z
dc.date.issued2005-10
dc.identifierFigueroa, Santiago Jose Alejandro; Requejo, Felix Gregorio; Lede, Eduardo Javier; Lamaita, Luciano; Peluso, Miguel Andrés; et al.; XANES study of electronic and structural nature of Mn-sites in manganese oxides with catalytic properties; Elsevier Science; Catalysis Today; 107-108; 10-2005; 849-855
dc.identifier0920-5861
dc.identifierhttp://hdl.handle.net/11336/57380
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1895882
dc.description.abstractThe characterization of a series of manganese oxides prepared by different methods were performed by X-ray diffraction (XRD) and X-ray absorption near-edge structure (XANES) analysis. Low crystallized phases were found by means of XRD. The XANES results indicated that the mean oxidation state value of all the samples was between 3+ and 4+. XANES analysis of spectra and extended X-ray absorption fine structure (EXAFS) data revealed that Mn was present in three different octahedral environments; one of them corresponded to the environment of Mn in the pyrolusite phase while the other two can be associated to Mn in ramsdellite-like environment and Mn in a octahedral site with Mn-vacancies in the second shell of coordination. The different oxides were analyzed in the reaction of total oxidation of ethanol and we found that the catalytic activity was enhanced when the couple Mn3+-Mn4+ was present in the structure of the oxides.
dc.languageeng
dc.publisherElsevier Science
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.cattod.2005.07.156
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0920586105004244
dc.rightshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectMN-VACANCIES
dc.subjectPCA
dc.subjectPYROLUSITE
dc.subjectXANES
dc.titleXANES study of electronic and structural nature of Mn-sites in manganese oxides with catalytic properties
dc.typeArtículos de revistas
dc.typeArtículos de revistas
dc.typeArtículos de revistas


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