Article
Influence of Vanadium or Cobalt Oxides on the CO Oxidation Behavior of Au/MO x/CeO 2-Al 2O 3 Systems
Author/s | Ramírez Reina, Tomás
Álvarez Moreno, Andrea Ivanova, Svetlana Odriozola Gordón, José Antonio Centeno Gallego, Miguel Ángel |
Department | Universidad de Sevilla. Departamento de Química Inorgánica |
Publication Date | 2012 |
Deposit Date | 2018-03-16 |
Published in |
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Abstract | A series of V 2O 5- and Co 3O 4-modified ceria/alumina supports and their corresponding gold catalysts were synthesized and their catalytic activities evaluated in the CO oxidation reaction. V 2O 5-doped solids demonstrated ... A series of V 2O 5- and Co 3O 4-modified ceria/alumina supports and their corresponding gold catalysts were synthesized and their catalytic activities evaluated in the CO oxidation reaction. V 2O 5-doped solids demonstrated a poor capacity to abate CO, even lower than that of the original ceria/alumina support, owing to the formation of CeVO 4. XRD, Raman spectroscopy, and H 2-temperature programmed reduction studies confirmed the presence of this stoichiometric compound, in which cerium was present as Ce 3+ and its redox properties were avoided. Co 3O 4-doped supports showed a high activity in CO oxidation at subambient temperatures. The vanadium oxide-doped gold catalysts were not efficient because of gold particle agglomeration and CeVO 4 formation. However, the gold-cobalt oxide-ceria/alumina catalysts demonstrated a high capacity to abate CO at and below room temperature. Total conversion was achieved at -70°C. The calculated apparent activation energy values revealed a theoretical optimum loading of a half-monolayer. |
Project ID. | ENE2012-374301-C03-01
TEP-8196 2009B60024 |
Citation | Ramírez Reina, T., Álvarez Moreno, A., Ivanova, S., Odriozola Gordón, J.A. y Centeno Gallego, M.Á. (2012). Influence of Vanadium or Cobalt Oxides on the CO Oxidation Behavior of Au/MO x/CeO 2-Al 2O 3 Systems. ChemCatChem, 4, 512-520. |
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