Preferential oxidation of CO in excess H2 over CuO/CeO2 catalysts: Characterization and performance as a function of the exposed face present in the CeO2 support

D. Gamarra, A. López Cámara, M. Monte, S. B. Rasmussen, L. E. Chinchilla, A. B. Hungría, G. Munuera, N. Gyorffy, Z. Schay, V. Cortés Corberán, J. C. Conesa, A. Martínez-Arias

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101 Citations (Scopus)

Abstract

A series of oxidised copper-cerium nanostructured catalysts prepared by impregnation of copper over ceria supports synthesized by different methods (hydrothermal with varying preparation parameters, microemulsion/precipitation), in order to achieve different specific morphologies (nanocubes, nanorods and nanospheres), have been examined with respect to their catalytic properties for preferential oxidation of CO in excess H2 (CO-PROX). The catalysts have been characterized in detail by XRD, Raman, SBET measurement, HREM, XPS, TPR and EPR, which allows establishing a model of structural characteristics of the catalysts. The characterization results have been correlated with analysis of CO-PROX catalytic properties by means of catalytic activity measurements complemented by operando-DRIFTS. Structural dependence of the CO oxidation reaction on the dispersed copper oxide entities as a function of the exposed face present at the surface of the different ceria supports is revealed. An important overall enhancement of the CO-PROX performance is detected for the sample supported on ceria nanocubes which is proposed to be a consequence of the interaction between copper oxide and (100) faces of the ceria support.

Original languageEnglish
Pages (from-to)224-238
Number of pages15
JournalApplied Catalysis B: Environmental
Volume130-131
DOIs
Publication statusPublished - Feb 7 2013

Keywords

  • CO-PROX
  • EPR
  • HREM
  • Nanostructured CuO-CeO catalysts
  • Operando-DRIFTS
  • Raman
  • TPR
  • XPS
  • XRD

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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  • Cite this

    Gamarra, D., Cámara, A. L., Monte, M., Rasmussen, S. B., Chinchilla, L. E., Hungría, A. B., Munuera, G., Gyorffy, N., Schay, Z., Corberán, V. C., Conesa, J. C., & Martínez-Arias, A. (2013). Preferential oxidation of CO in excess H2 over CuO/CeO2 catalysts: Characterization and performance as a function of the exposed face present in the CeO2 support. Applied Catalysis B: Environmental, 130-131, 224-238. https://doi.org/10.1016/j.apcatb.2012.11.008