Mesoporous and nanostructured CeO as supports of nano-sized gold catalysts for low-temperature water-gas shift reaction

Z.-Y. Yuan, V. Idakiev, A. Vantomme, T. Tabakova, T.-Z. Ren, B.-L. Su

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

Mesoporous particles and 1D nanorods of cerium oxides have been prepared by modifying the hydrothermal route of a surfactant-assisted controllable synthesis. Mesoporous cerias were obtained in a sealed glass vessel under continuous stirring, while ceria nanorods were obtained in a Teflon-lined autoclave without stirring. The mesoporous cerias did not show long-range mesoscopic organization, exhibiting a broad mesopore size distribution in the region 8-15 nm. A BET surface area of 100 m/g with a total pore volume of 0.33 cm/g is obtained for as-synthesized mesoporous ceria. The ceria nanorods exhibit a cubic crystalline structure after calcination, having the lengths in the range of 150-300 nm and diameters in the range of 10-25 nm. The growth direction of ceria nanorods is along [1 1 0]. A surface area of above 50 m/g is obtained in the calcined nanorods. These synthesized ceria materials were used as supports of nano-sized gold catalysts, prepared by deposition-precipitation method. Their catalytic activity was evaluated by the low-temperature water-gas shift reaction. The gold/mesoporous ceria catalytic system exhibited higher catalytic activity than gold/ceria nanorods. It is revealed that the mesoporous and nanostructured cerias are of much interest as potential supports for gold-based catalysts that are effective for low-temperature water-gas shift reaction.
langue originaleAnglais
Pages (de - à)203-210
Nombre de pages8
journalCatalysis Today
Volume131
Numéro de publication1-4
Les DOIs
étatPublié - 29 févr. 2008

Empreinte digitale

Water gas shift
Cerium compounds
Catalyst supports
Gold
Catalysts
Nanorods
Temperature
Catalyst activity
Autoclaves
Polytetrafluoroethylene
Cerium
Polytetrafluoroethylenes
Surface-Active Agents
Calcination
Surface active agents
Crystalline materials
Glass
Oxides

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abstract = "Mesoporous particles and 1D nanorods of cerium oxides have been prepared by modifying the hydrothermal route of a surfactant-assisted controllable synthesis. Mesoporous cerias were obtained in a sealed glass vessel under continuous stirring, while ceria nanorods were obtained in a Teflon-lined autoclave without stirring. The mesoporous cerias did not show long-range mesoscopic organization, exhibiting a broad mesopore size distribution in the region 8-15 nm. A BET surface area of 100 m/g with a total pore volume of 0.33 cm/g is obtained for as-synthesized mesoporous ceria. The ceria nanorods exhibit a cubic crystalline structure after calcination, having the lengths in the range of 150-300 nm and diameters in the range of 10-25 nm. The growth direction of ceria nanorods is along [1 1 0]. A surface area of above 50 m/g is obtained in the calcined nanorods. These synthesized ceria materials were used as supports of nano-sized gold catalysts, prepared by deposition-precipitation method. Their catalytic activity was evaluated by the low-temperature water-gas shift reaction. The gold/mesoporous ceria catalytic system exhibited higher catalytic activity than gold/ceria nanorods. It is revealed that the mesoporous and nanostructured cerias are of much interest as potential supports for gold-based catalysts that are effective for low-temperature water-gas shift reaction.",
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Mesoporous and nanostructured CeO as supports of nano-sized gold catalysts for low-temperature water-gas shift reaction. / Yuan, Z.-Y.; Idakiev, V.; Vantomme, A.; Tabakova, T.; Ren, T.-Z.; Su, B.-L.

Dans: Catalysis Today, Vol 131, Numéro 1-4, 29.02.2008, p. 203-210.

Résultats de recherche: Contribution à un journal/une revueArticle

TY - JOUR

T1 - Mesoporous and nanostructured CeO as supports of nano-sized gold catalysts for low-temperature water-gas shift reaction

AU - Yuan, Z.-Y.

AU - Idakiev, V.

AU - Vantomme, A.

AU - Tabakova, T.

AU - Ren, T.-Z.

AU - Su, B.-L.

PY - 2008/2/29

Y1 - 2008/2/29

N2 - Mesoporous particles and 1D nanorods of cerium oxides have been prepared by modifying the hydrothermal route of a surfactant-assisted controllable synthesis. Mesoporous cerias were obtained in a sealed glass vessel under continuous stirring, while ceria nanorods were obtained in a Teflon-lined autoclave without stirring. The mesoporous cerias did not show long-range mesoscopic organization, exhibiting a broad mesopore size distribution in the region 8-15 nm. A BET surface area of 100 m/g with a total pore volume of 0.33 cm/g is obtained for as-synthesized mesoporous ceria. The ceria nanorods exhibit a cubic crystalline structure after calcination, having the lengths in the range of 150-300 nm and diameters in the range of 10-25 nm. The growth direction of ceria nanorods is along [1 1 0]. A surface area of above 50 m/g is obtained in the calcined nanorods. These synthesized ceria materials were used as supports of nano-sized gold catalysts, prepared by deposition-precipitation method. Their catalytic activity was evaluated by the low-temperature water-gas shift reaction. The gold/mesoporous ceria catalytic system exhibited higher catalytic activity than gold/ceria nanorods. It is revealed that the mesoporous and nanostructured cerias are of much interest as potential supports for gold-based catalysts that are effective for low-temperature water-gas shift reaction.

AB - Mesoporous particles and 1D nanorods of cerium oxides have been prepared by modifying the hydrothermal route of a surfactant-assisted controllable synthesis. Mesoporous cerias were obtained in a sealed glass vessel under continuous stirring, while ceria nanorods were obtained in a Teflon-lined autoclave without stirring. The mesoporous cerias did not show long-range mesoscopic organization, exhibiting a broad mesopore size distribution in the region 8-15 nm. A BET surface area of 100 m/g with a total pore volume of 0.33 cm/g is obtained for as-synthesized mesoporous ceria. The ceria nanorods exhibit a cubic crystalline structure after calcination, having the lengths in the range of 150-300 nm and diameters in the range of 10-25 nm. The growth direction of ceria nanorods is along [1 1 0]. A surface area of above 50 m/g is obtained in the calcined nanorods. These synthesized ceria materials were used as supports of nano-sized gold catalysts, prepared by deposition-precipitation method. Their catalytic activity was evaluated by the low-temperature water-gas shift reaction. The gold/mesoporous ceria catalytic system exhibited higher catalytic activity than gold/ceria nanorods. It is revealed that the mesoporous and nanostructured cerias are of much interest as potential supports for gold-based catalysts that are effective for low-temperature water-gas shift reaction.

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