NO reduction by CO catalyzed with Au/TiO2 in oxygen-rich condition

J. A. Wang, J. A. Toledo, C. Angeles, M. Moran-Pineda, A. García-Ruiz

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Resumen

Gold nanoparticles supported on titania catalysts with different Au loadings were prepared and evaluated in the reaction of NO reduction by CO in an oxygen rich condition. The crystalline structures of the Au/TiO2 materials were refined with Rietveld method. TiO2 support chiefly contains anatase phase, having a crystalline size ranged from 5 to 15 nm. Au particles have an average crystal size approximately 2-5 nm as Au concentration less 3 wt %. In the reaction of NO + CO + O2, the Au/TiO2 catalysts show a selectivity to 100 % N2, neither NO2 nor N2O was yielded in the reaction temperature between 25 and 400°C, which strongly indicates that Au/TiO2 catalysts are much superior to the other catalysts like Pt/TiO2 catalysts on which N2O was usually produced in the reaction temperature below 200°C and NO 2 was produced in the reaction temperature above 300°C under a similar reaction condition.

Idioma originalInglés
Título de la publicación alojadaNew Catalytic Materials
EditorialMaterials Research Society
Páginas197-204
Número de páginas8
ISBN (versión impresa)9781605112565
DOI
EstadoPublicada - 2010

Serie de la publicación

NombreMaterials Research Society Symposium Proceedings
Volumen1279
ISSN (versión impresa)0272-9172

Huella

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