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Thermal Ageing Induced Effects on Pd/LaFeO3 for NOx Reduction by Hydrocarbons: Influence of the Preparation Method

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Abstract

The influence of the support synthesis for the preparation of supported Pd/LaFeO3 perovskite based catalysts and the nature of the palladium precursor on the catalytic performances in the selective reduction of NO to N2 by hydrocarbons have been investigated. According to the preparation method, subsequent surface and bulk characterisation revealed significant changes in the degree of dispersion and the chemical environment of oxidic palladium species depending on the extent of interaction with the support. Pd nitrate precursor leads to the stabilisation of the Pd surface concentration. The metal support interactions thus obtained strongly enhance the catalytic performances, particularly the resistance to thermal ageing whereas sol–gel synthesis produces the higher support activity.

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Acknowledgements

We gratefully acknowledge Mrs L. Burylo, Mrs M. Frere and Dr. L. Gengembre who conducted XRD and XPS measurements.

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Authors and Affiliations

  1. UCCS, UMR 8181, Bât C3, Université des Sciences et Technologies de Lille, 59650, Villeneuve d’Ascq, France

    Pierre Miquel, Yas Yamin, Christophe Dujardin & Pascal Granger

  2. RENAULT SAS, Direction de l’Ingénierie des MATériaux, 1 Allée Cornuel, 91510, Lardy, France

    Pierre Miquel & Karine Lombaert

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  1. Pierre Miquel
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  2. Yas Yamin
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  3. Karine Lombaert
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  4. Christophe Dujardin
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  5. Pascal Granger
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Correspondence to Christophe Dujardin.

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Miquel, P., Yamin, Y., Lombaert, K. et al. Thermal Ageing Induced Effects on Pd/LaFeO3 for NOx Reduction by Hydrocarbons: Influence of the Preparation Method. Top Catal 52, 1791 (2009). https://doi.org/10.1007/s11244-009-9333-y

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  • DOI: https://doi.org/10.1007/s11244-009-9333-y

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