Open Access
Oil & Gas Science and Technology - Rev. IFP
Volume 61, Number 5, September-October 2006
Page(s) 677 - 689
Published online 01 January 2007
Oil & Gas Science and Technology - Rev. IFP, Vol. 61 (2006), No. 5, pp. 677-689
DOI: 10.2516/ogst:2006006

Combining Solid State Physics Concepts and X-Ray Absorption Spectroscopy to Understand DeNOx Catalysis

Contribution des concepts de la physique des solides et de la spectroscopie d'absorption des rayons X à la compréhension du processus de catalyse DeNOx

D. Bazin1, D. Sayers2, J. Lynch3, L. Guczi4, G. Tréglia5 and C. Mottet5

1  LPS, Bâtiment 510, Université Paris XI, 91405 Orsay Cedex - France, email:
2  Department of Physics, North Carolina State University, 27695, Raleigh, North Carolina - United States
3  IFP,1 et 4, avenue de Bois-Preau, 92852 Rueil-Malmaison Cedex - France, email:
4  Department of Surface Chemistry and Catalysis, Institute of Isotope and Surface Chemistry, CRC HAS, P.O. Box 77, 1525 Budapest - Hungary, email:
5  CRMCN, Campus de Luminy, Case 913, 13288 Marseille Cedex 9 - France, email:,

Considering the NO adsorption process, starting from theoretical considerations, evaluation of the variation of the properties of metallic clusters versus their size and composition leads to a prediction of the NO adsorption mode on these nanoentities. Then, based on experimental results obtained mostly through X-ray absorption spectroscopy, we have connected the adsorption mode of the molecule to the behaviour of the metallic cluster following the adsorption process. A simple hypothesis leads us to discuss the catalytic activity of nanometer scale metallic clusters following NO adsorption.

Partant des considérations théoriques, l'évaluation de la variation des propriétés d'agrégats métalliques en fonction de leur taille et leur composition mène à une prédiction du mode d'adsorption du NO sur ces nanoentités. En nous appuyant sur les résultats expérimentaux obtenus surtout par la spectroscopie d'absorption de rayons X, nous proposons de lier le mode d'adsorption de la molécule au comportement de l'agrégat métallique suite à l'adsorption. Une hypothèse simple nous mène à envisager une interprétation de l'activité catalytique d'agrégats métalliques nanométriques lors de l'adsorption du NO.

© IFP 2006

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