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Size and shape effects in nanostructured catalysts based on combinations of copper and cerium oxides for preferential oxidation of CO in H2-rich streams

AuthorsMartínez Arias, Arturo ; Conesa Cegarra, José Carlos ; Monte Caballero, Manuel ; López Cámara, Antonio
Issue Date16-Aug-2015
CitationACS Fall Meeting (2015)
AbstractCatalysts based on combinations between copper and cerium oxides are an interesting alternative to noble metal ones for processes involved in production/purification of hydrogen produced from hydrocarbons or biomass like the water-gas shift or preferential oxidation of CO reactions. Active sites for such processes have been proposed to correspond to reduced species formed at the interface between both oxides. The morphological characteristics of such interfaces appear therefore most interesting in order to determine redox and catalytic properties of this type of systems for such processes. In principle, the combination of the two oxides can be done in direct (ceria as support of copper oxide) or inverse (copper oxide as support of ceria) configurations. Every one of these two configurations displays specific redox/catalytic properties. The presentation will discuss structure/activity relationships for this type of catalyst/process with the use of a multitechnique characterization approach including in situ-XAFS –XPS and –DRIFTS as well as conventional structural characterization, DFT+U calculations and activity tests.
DescriptionTrabajo presentado en el ACS Fall Meeting, celebrado en Boston (Estados Unidos) del 16 al 20 de agosto de 2015.
Appears in Collections:(ICP) Comunicaciones congresos
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