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Influence of Vanadium or Cobalt Oxides on the CO Oxidation Behavior of Au/MOx/CeO2–Al2O3 Systems

Ramirez Reina, T, Moreno, AA, Ivanova, S, Ordriozola, JA and Centeno, MA (2012) Influence of Vanadium or Cobalt Oxides on the CO Oxidation Behavior of Au/MOx/CeO2–Al2O3 Systems ChemCatChem, 4 (4). pp. 512-520.

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Abstract

A series of V2O5- and Co3O4-modified ceria/alumina supports and their corresponding gold catalysts were synthesized and their catalytic activities evaluated in the CO oxidation reaction. V2O5-doped solids demonstrated a poor capacity to abate CO, even lower than that of the original ceria/alumina support, owing to the formation of CeVO4. XRD, Raman spectroscopy, and H2-temperature programmed reduction studies confirmed the presence of this stoichiometric compound, in which cerium was present as Ce3+ and its redox properties were avoided. Co3O4-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 CeVO4 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.

Item Type: Article
Subjects : Chemical and Process Engineering
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Ramirez Reina, TUNSPECIFIEDUNSPECIFIED
Moreno, AAUNSPECIFIEDUNSPECIFIED
Ivanova, SUNSPECIFIEDUNSPECIFIED
Ordriozola, JAUNSPECIFIEDUNSPECIFIED
Centeno, MAUNSPECIFIEDUNSPECIFIED
Date : 28 March 2012
Identification Number : 10.1002/cctc.201100373
Copyright Disclaimer : Copyright: 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Depositing User : Symplectic Elements
Date Deposited : 13 Sep 2016 10:48
Last Modified : 31 Oct 2017 18:42
URI: http://epubs.surrey.ac.uk/id/eprint/812131

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