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Electrochemical promotion of Pt impregnated catalyst for the treatment of automotive exhaust emissions

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Abstract

This study has shown that Pt/K-βAl2O3 electrochemical catalyst can reach high catalytic activity for the selective reduction of N2O by C3H6. In addition it was also demonstrated that Electrochemical Promotion could be a solution to reduce the adverse effects of poisons (O2 and H2O) on the catalytic activity. For instance, in the presence of O2 (1%) and H2O (3%) in the reactive stream, electrochemical pumping of potassium ions to the Pt catalyst increased the N2O reduction rate by a factor of 7.4 at 400 °C. We have also demonstrated that the wet impregnation procedure led to a very stable Pt film, with very good resistance to thermal sintering under real operation conditions. Therefore, the use of Pt impregnated films deposited on K-βAl2O3 solid electrolytes is a feasible solution for the treatment of automotive exhaust gases.

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Acknowledgements

Financial support by the Ministerio de Educación y Ciencia of Spain (Projects: CTQ2004-07350-C02-01/PQ and CTQ2007-62512/PPQ) and the European Marie-Curie EFEPOC project (MSCF-CT-2006-046201) are gratefully acknowledged.

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Authors and Affiliations

  1. Departamento de Ingeniería Química, Facultad de Ciencias Químicas, Universidad de Castilla La Mancha, Avda. Camilo José Cela s/n 13071, Ciudad Real, Spain

    Antonio de Lucas-Consuegra, Fernando Dorado, Carmen Jiménez-Borja & José Luís Valverde

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  1. Antonio de Lucas-Consuegra
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  2. Fernando Dorado
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  3. Carmen Jiménez-Borja
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  4. José Luís Valverde
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Correspondence to Antonio de Lucas-Consuegra.

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de Lucas-Consuegra, A., Dorado, F., Jiménez-Borja, C. et al. Electrochemical promotion of Pt impregnated catalyst for the treatment of automotive exhaust emissions. J Appl Electrochem 38, 1151–1157 (2008). https://doi.org/10.1007/s10800-008-9559-6

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  • DOI: https://doi.org/10.1007/s10800-008-9559-6

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