Gold catalysts supported on ceria-modified mesoporous zirconia for low-temperature water-gas shift reaction

V. Idakiev, T. Tabakova, K. Tenchev, Z.-Y. Yuan, T.-Z. Ren, B.-L. Su

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

New gold catalytic system prepared on ceriamodified mesoporous zirconia used as water-gas shift (WGS) catalyst is reported. Mesoporous zirconia was synthesized using surfactant templating method through a neutral [C (EO) -Zr(OC H ) ] assembly pathway. Ceria modifying additive was deposited on mesoporous zirconia by deposition-precipitation method. Gold-based catalysts with different gold content (1-3 wt. %) were synthesized by deposition-precipitation of gold hydroxide on mixed metal oxide support. The supports and the catalysts were characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, N adsorption analysis and temperature programmed reduction. The catalytic behavior of the gold-based catalysts was evaluated in WGS reaction in a wide temperature range (140-300 °C) and at different space velocities and H O/CO ratios. The influence of gold content and particle size on the catalytic performance was investigated. The WGS activity of the new Au/ceria-modified mesoporous zirconia catalysts was compared with that of gold catalysts supported on simple oxides CeO and mesoporous ZrO , revealing significantly higher catalytic activity of Au/ceria-modified mesoporous zirconia. A high degree of synergistic interaction between ceria and mesoporous zirconia and a positive modification of structural and catalytic properties by ceria have been achieved. It is clearly revealed that the ceria-modified mesoporous zirconia is of much interest as potential support for gold-based catalyst. The Au/ceria-modified mesoporous zirconia catalytic system is found to be effective catalyst for WGS reaction.
langue originaleAnglais
Pages (de - à)15-20
Nombre de pages6
journalJournal of Porous Materials
Volume19
Numéro de publication1
Les DOIs
étatPublié - 1 févr. 2012

Empreinte digitale

Water gas shift
Cerium compounds
Catalyst supports
Zirconia
Gold
Catalysts
Temperature
Oxides
zirconium oxide
Carbon Monoxide
High resolution transmission electron microscopy
Surface-Active Agents
X ray powder diffraction
Catalyst activity
Surface active agents
Metals
Particle size
Adsorption

Citer ceci

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abstract = "New gold catalytic system prepared on ceriamodified mesoporous zirconia used as water-gas shift (WGS) catalyst is reported. Mesoporous zirconia was synthesized using surfactant templating method through a neutral [C (EO) -Zr(OC H ) ] assembly pathway. Ceria modifying additive was deposited on mesoporous zirconia by deposition-precipitation method. Gold-based catalysts with different gold content (1-3 wt. {\%}) were synthesized by deposition-precipitation of gold hydroxide on mixed metal oxide support. The supports and the catalysts were characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, N adsorption analysis and temperature programmed reduction. The catalytic behavior of the gold-based catalysts was evaluated in WGS reaction in a wide temperature range (140-300 °C) and at different space velocities and H O/CO ratios. The influence of gold content and particle size on the catalytic performance was investigated. The WGS activity of the new Au/ceria-modified mesoporous zirconia catalysts was compared with that of gold catalysts supported on simple oxides CeO and mesoporous ZrO , revealing significantly higher catalytic activity of Au/ceria-modified mesoporous zirconia. A high degree of synergistic interaction between ceria and mesoporous zirconia and a positive modification of structural and catalytic properties by ceria have been achieved. It is clearly revealed that the ceria-modified mesoporous zirconia is of much interest as potential support for gold-based catalyst. The Au/ceria-modified mesoporous zirconia catalytic system is found to be effective catalyst for WGS reaction.",
author = "V. Idakiev and T. Tabakova and K. Tenchev and Z.-Y. Yuan and T.-Z. Ren and B.-L. Su",
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Gold catalysts supported on ceria-modified mesoporous zirconia for low-temperature water-gas shift reaction. / Idakiev, V.; Tabakova, T.; Tenchev, K.; Yuan, Z.-Y.; Ren, T.-Z.; Su, B.-L.

Dans: Journal of Porous Materials, Vol 19, Numéro 1, 01.02.2012, p. 15-20.

Résultats de recherche: Contribution à un journal/une revueArticle

TY - JOUR

T1 - Gold catalysts supported on ceria-modified mesoporous zirconia for low-temperature water-gas shift reaction

AU - Idakiev, V.

AU - Tabakova, T.

AU - Tenchev, K.

AU - Yuan, Z.-Y.

AU - Ren, T.-Z.

AU - Su, B.-L.

PY - 2012/2/1

Y1 - 2012/2/1

N2 - New gold catalytic system prepared on ceriamodified mesoporous zirconia used as water-gas shift (WGS) catalyst is reported. Mesoporous zirconia was synthesized using surfactant templating method through a neutral [C (EO) -Zr(OC H ) ] assembly pathway. Ceria modifying additive was deposited on mesoporous zirconia by deposition-precipitation method. Gold-based catalysts with different gold content (1-3 wt. %) were synthesized by deposition-precipitation of gold hydroxide on mixed metal oxide support. The supports and the catalysts were characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, N adsorption analysis and temperature programmed reduction. The catalytic behavior of the gold-based catalysts was evaluated in WGS reaction in a wide temperature range (140-300 °C) and at different space velocities and H O/CO ratios. The influence of gold content and particle size on the catalytic performance was investigated. The WGS activity of the new Au/ceria-modified mesoporous zirconia catalysts was compared with that of gold catalysts supported on simple oxides CeO and mesoporous ZrO , revealing significantly higher catalytic activity of Au/ceria-modified mesoporous zirconia. A high degree of synergistic interaction between ceria and mesoporous zirconia and a positive modification of structural and catalytic properties by ceria have been achieved. It is clearly revealed that the ceria-modified mesoporous zirconia is of much interest as potential support for gold-based catalyst. The Au/ceria-modified mesoporous zirconia catalytic system is found to be effective catalyst for WGS reaction.

AB - New gold catalytic system prepared on ceriamodified mesoporous zirconia used as water-gas shift (WGS) catalyst is reported. Mesoporous zirconia was synthesized using surfactant templating method through a neutral [C (EO) -Zr(OC H ) ] assembly pathway. Ceria modifying additive was deposited on mesoporous zirconia by deposition-precipitation method. Gold-based catalysts with different gold content (1-3 wt. %) were synthesized by deposition-precipitation of gold hydroxide on mixed metal oxide support. The supports and the catalysts were characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, N adsorption analysis and temperature programmed reduction. The catalytic behavior of the gold-based catalysts was evaluated in WGS reaction in a wide temperature range (140-300 °C) and at different space velocities and H O/CO ratios. The influence of gold content and particle size on the catalytic performance was investigated. The WGS activity of the new Au/ceria-modified mesoporous zirconia catalysts was compared with that of gold catalysts supported on simple oxides CeO and mesoporous ZrO , revealing significantly higher catalytic activity of Au/ceria-modified mesoporous zirconia. A high degree of synergistic interaction between ceria and mesoporous zirconia and a positive modification of structural and catalytic properties by ceria have been achieved. It is clearly revealed that the ceria-modified mesoporous zirconia is of much interest as potential support for gold-based catalyst. The Au/ceria-modified mesoporous zirconia catalytic system is found to be effective catalyst for WGS reaction.

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DO - 10.1007/s10934-010-9441-x

M3 - Article

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VL - 19

SP - 15

EP - 20

JO - Journal of Porous Materials

JF - Journal of Porous Materials

SN - 1380-2224

IS - 1

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