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: Article

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

Huella dactilar

Carbon Monoxide
Catalyst supports
Silicon Dioxide
Oxidation
Temperature
Catalyst activity
Metals
Silica
Catalysts

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Citar esto

Astudillo, Julián ; Águila, Gonzalo ; Díaz, Francisco ; Guerrero, Sichem ; Araya, Paulo. / Study of CuO-CeO2 catalysts supported on SiO2 on the low-temperature oxidation of CO. En: Applied Catalysis A: General. 2010 ; Vol. 381, N.º 1-2. pp. 169-176.
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abstract = "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.",
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Study of CuO-CeO2 catalysts supported on SiO2 on the low-temperature oxidation of CO. / Astudillo, Julián; Águila, Gonzalo; Díaz, Francisco; Guerrero, Sichem; Araya, Paulo.

En: Applied Catalysis A: General, Vol. 381, N.º 1-2, 15.06.2010, p. 169-176.

Resultado de la investigación: Article

TY - JOUR

T1 - Study of CuO-CeO2 catalysts supported on SiO2 on the low-temperature oxidation of CO

AU - Astudillo, Julián

AU - Águila, Gonzalo

AU - Díaz, Francisco

AU - Guerrero, Sichem

AU - Araya, Paulo

PY - 2010/6/15

Y1 - 2010/6/15

N2 - 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.

AB - 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.

KW - CeO

KW - CO oxidation

KW - CuO

KW - SiO

KW - Supported catalysts

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