Study of CuO-CeO2 catalysts supported on SiO2 on the low-temperature oxidation of CO

Julián Astudillo, Gonzalo Águila, Francisco Díaz, Sichem Guerrero, Paulo Araya

Resultado de la investigación: Contribución a una revistaArtículo

28 Citas (Scopus)

Resumen

A study was made on the effect of the Cu/Ce ratio and on the total load of both metals on the oxidation activity of CO with O2 using SiO2 as support. It was found that the optimum Cu/Ce ratio for a constant total load of 10% on silica (Aerosil 200) was 0.43 (w/w), which corresponded to a catalyst with 3% Cu and 7% Ce. For that ratio the highly dispersed CuO-CeO2 interface was maximized. The catalyst's activity increased with increasing the total Cu-Ce load, but it reached a maximum above which the activity kept constant due to a similar concentration of sites at the CuO-CeO2 interface. The higher surface area of the support led to a increase of CuO particles interacting with CeO2 and to a decrease of bulk CuO species not interacting with CeO2. The highly dispersed CuO-CeO2 interface was not affected by a higher available surface area explaining the similar activity in supports with different surface area.

Idioma originalInglés
Páginas (desde-hasta)169-176
Número de páginas8
PublicaciónApplied Catalysis A: General
Volumen381
N.º1-2
DOI
EstadoPublicada - 15 jun 2010

Áreas temáticas de ASJC Scopus

  • Catálisis
  • Química de procesos y tecnología

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