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Artículo

Cobalt oxide-based catalysts supported on zirconia fibers synthesized by atomic layer deposition

Leonardi, Sabrina AntonelaIcon ; Milt, Viviana GuadalupeIcon ; Fontanini, María Magdalena; Miro, Eduardo ErnestoIcon ; Bortolozzi, Juan PabloIcon
Fecha de publicación: 01/2023
Editorial: Elsevier Science SA
Revista: Materials Chemistry and Physics
ISSN: 0254-0584
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Cerámicos

Resumen

This work is focused on the synthesis and evaluation of cobalt oxides grown onto zirconia fibers by the Atomic Layer Deposition (ALD) technique. CO oxidation is a wide studied reaction so that it was used as a model for testing the synthesized catalysts. Morphological and physicochemical properties were investigated through various characterization techniques. The deposited loading of the active phase was low (<1.2 at.% in all samples), and it was dispersed homogeneously along the zirconium oxide with fiber morphology with an length/diameter aspect ratio of about 50. Bulk and surface analysis showed the presence of different cobalt species (Co2+ and Co3+) that allow obtaining active catalysts for the reaction under study. Both the total amount of cobalt and the proportion of Co3+ species were higher as the number of ALD cycles increased. Through stability experiments, a change in the active species was detected after various cycles of reaction. This modification led to an increase in the surface Co3+ amount with changes in the coordination state.
Palabras clave: ALD TECHNIQUE , CO OXIDATION , COBALT CATALYSTS , ZRO2 FIBERS
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/222084
URL: https://www.sciencedirect.com/science/article/pii/S0254058422013499
DOI: https://doi.org/10.1016/j.matchemphys.2022.127043
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Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Citación
Leonardi, Sabrina Antonela; Milt, Viviana Guadalupe; Fontanini, María Magdalena; Miro, Eduardo Ernesto; Bortolozzi, Juan Pablo; Cobalt oxide-based catalysts supported on zirconia fibers synthesized by atomic layer deposition; Elsevier Science SA; Materials Chemistry and Physics; 294; 1-2023; 1-8
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