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The characterisation and reactivity of nanostructured cerium-copper-oxide composites for environmental catalysis

Published online by Cambridge University Press:  21 March 2011

Othon Adamopoulos
Affiliation:
Dept of Materials Science and Engineering, The Royal Institute of Technology, Stockholm S-100 44, Sweden
Yu Zhang
Affiliation:
Dept of Materials Science and Engineering, The Royal Institute of Technology, Stockholm S-100 44, Sweden
Mark Croft
Affiliation:
Dept of Physics, Rutgers University, Piscataway, NJ, U. S. A
Igor Zakharchenko
Affiliation:
Dept of Ceramics and Materials Engineering, Rutgers University, Piscataway, NJ, U. S. A
Thomas Tsakalakos
Affiliation:
Dept of Ceramics and Materials Engineering, Rutgers University, Piscataway, NJ, U. S. A
Mamoun Muhammed
Affiliation:
Dept of Materials Science and Engineering, The Royal Institute of Technology, Stockholm S-100 44, Sweden
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Abstract

Nanophase Ce-Cu-O powder has been synthesised via co-precipitation approach, whereas computer-assisted thermodynamic modelling was used to predict the optimum experimental criteria. The properties of Ce-Cu-O composite (10 mol% CuO) have been extensively investigated by a variety of techniques. The obtained materials show different morphology compared to other doped ceria salts, with uniform distribution of Ce and Cu throughout the powder. Detailed XRD study does not show the formation of solid solution and the composites consist of two separate metal oxides. X-ray absorption spectroscopy study shows a variation of the existence of Cu and Ce in several oxidation states. Copper oxide seems to exist evenly distributed along the surfaces and boundaries of the crystal grains of CeO2 on the nanoscale. The temperature-programmed reduction indicated that Ce-Cu-O composite has an enhanced oxygen storage capacity compared to CeO2 or pure copper oxide.

Type
Research Article
Copyright
Copyright © Materials Research Society 2001

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References

1. Palmqvist, C., Johansson, E. M., Järås, S. G. and Muhammed, M., Cat. Lett. 56, 6975 (1998).CrossRefGoogle Scholar
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