Catalysis Letters

, Volume 116, Issue 1–2, pp 15–22 | Cite as

Adsorption and reaction of CO on CuO–CeO2 catalysts prepared by the combustion method

  • George Avgouropoulos
  • Theophilos Ioannides


Temperature-programmed techniques were employed to investigate the interaction of CO with CuO–CeO2 prepared by the urea-nitrates combustion method. These catalysts exhibited high and stable CO oxidation activity at relatively low reaction temperatures (< 150 °C). The CO adsorption capacity and catalytic activity of the catalysts was analogous to the concentration of easily-reduced copper oxide surface species. TPD and TPSR results can be explained by a dual scheme of CO adsorption: (i) on oxidized sites, which get reduced with simultaneous formation of surface CO2 and (ii) on reduced sites created by the former interaction. 10–20% of adsorbed CO desorbs molecularly in the absence of gas-phase O2, but reacts totally towards CO2 in the presence of gas-phase O2. Inhibition by CO2 observed under steady-state CO oxidation conditions is due to CO2 adsorption as found by CO2-TPD.


CO oxidation ceria copper oxide combustion method TPD TPSR 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Foundation for Research and Technology-HellasInstitute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ICE-HT)PatrasGreece

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