Argentina | Artículos de revistas
dc.creatorGómez, Leticia Ester
dc.creatorMiro, Eduardo Ernesto
dc.creatorBoix, Alicia Viviana
dc.date.accessioned2015-06-25T18:15:19Z
dc.date.accessioned2018-11-06T12:23:13Z
dc.date.available2015-06-25T18:15:19Z
dc.date.available2018-11-06T12:23:13Z
dc.date.created2015-06-25T18:15:19Z
dc.date.issued2013-03-29
dc.identifierGómez, Leticia Ester; Miro, Eduardo Ernesto; Boix, Alicia Viviana; Spectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction; Pergamon-elsevier Science Ltd; International Journal Of Hydrogen Energy; 38; 29-3-2013; 5645-5654
dc.identifier0360-3199
dc.identifierhttp://hdl.handle.net/11336/948
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1865961
dc.description.abstractMn-Co-Ce mixed oxides are active and selective catalysts for the CO preferential oxidation (COPROX), which is a promising process for the purification of hydrogen streams. In this work, we report a careful spectroscopic characterization of the said system, with the aim of relating its physical chemistry properties to the catalytic behavior. In all the Co-Mn-Ce samples, we detected the formation of partially developed (Mn,Co)3O4 mixed spinels. The presence of these species, which can be reduced during the TPR experiments at an intermediate temperature range (300-600°C), was also suggested by XRD and LRS. XPS results show that in all cases the catalytic surface is enriched in Mn, while the opposite occurs for Co. As regards the catalytic activity, we observed that the best formulations were those containing intermediate Mn/Co ratios (1/4 and 1/1), which can be ascribed to the promoting effect of Mn in improving the redox properties of Co active sites and provoking an increase in surface area. The best catalyst, which has a Mn/Co ratio of 1/4, was very stable after 75 h of time-on-stream with CO2 included in the feed.
dc.languageeng
dc.publisherPergamon-elsevier Science Ltd
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.ijhydene.2013.03.004
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectMn-Co-Ce MIXED OXIDES
dc.subjectCOPROX
dc.subjectXPS
dc.subjectRAMAN
dc.subjectCO2 TOLERANCE
dc.subjectHYDROGEN
dc.titleSpectroscopic characterization of Mn-Co-Ce mixed oxides, active catalysts for COPROX reaction
dc.typeArtículos de revistas
dc.typeArtículos de revistas
dc.typeArtículos de revistas


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