Novel Au/TiO2/Al2O3• xH2O catalysts for CO oxidation

Wen Fu Yan; Zhen Ma; Shannon M. Mahurin; Jian Jiao; Edward W. Hagaman; Steven H. Overbury; Sheng Dai

doi:10.1007/s10562-007-9369-1

Novel Au/TiO₂/Al₂O₃• xH₂O catalysts for CO oxidation

Wen Fu Yan, Zhen Ma, Shannon M. Mahurin, Jian Jiao, Edward W. Hagaman, Steven H. Overbury, Sheng Dai

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Au/Al₂O₃• xH₂O and Au/TiO ₂/Al₂O₃• xH₂O (x = 0-3) catalysts were prepared by assembling gold nanoparticles on neat and TiO ₂-modified Al₂O₃, AlOOH, and Al(OH)₃ supports, and their catalytic activity in CO oxidation was tested either as synthesized or after on-line pretreatment in O₂-He at 500 °C. A promotional effect of TiO₂ on the activity of gold catalysts was observed upon 500 °C-pretreatment. The catalyst stability as a function of time on stream was tested in the absence or presence of H₂, and physiochemical characterization applying BET, ICP-OES, XRD, TEM, and ²⁷Al MAS NMR was conducted.

Original language	English
Pages (from-to)	209-218
Number of pages	10
Journal	Catalysis Letters
Volume	121
Issue number	3-4
DOIs	https://doi.org/10.1007/s10562-007-9369-1
State	Published - Mar 2008

Funding

Acknowledgments This work was supported by the Office of Basic Energy Sciences, U.S. Department of Energy. The Oak Ridge National Laboratory is managed by UT-Battelle, LLC for the U.S. DOE under Contract DE-AC05-00OR22725. This research was supported in part by the appointment for W. F. Yan, Z. Ma, S. M. Mahurin, and J. Jiao to the ORNL Research Associates Program, administered jointly by ORNL and the Oak Ridge Associated Universities.

Keywords

Activity
AlO
CO oxidation
Gold catalysts
Nanoparticles
Promotion
TiO

Access to Document

10.1007/s10562-007-9369-1

Cite this

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abstract = "Au/Al2O3• xH2O and Au/TiO 2/Al2O3• xH2O (x = 0-3) catalysts were prepared by assembling gold nanoparticles on neat and TiO 2-modified Al2O3, AlOOH, and Al(OH)3 supports, and their catalytic activity in CO oxidation was tested either as synthesized or after on-line pretreatment in O2-He at 500 °C. A promotional effect of TiO2 on the activity of gold catalysts was observed upon 500 °C-pretreatment. The catalyst stability as a function of time on stream was tested in the absence or presence of H2, and physiochemical characterization applying BET, ICP-OES, XRD, TEM, and 27Al MAS NMR was conducted.",

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AU - Yan, Wen Fu

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AU - Overbury, Steven H.

AU - Dai, Sheng

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AB - Au/Al2O3• xH2O and Au/TiO 2/Al2O3• xH2O (x = 0-3) catalysts were prepared by assembling gold nanoparticles on neat and TiO 2-modified Al2O3, AlOOH, and Al(OH)3 supports, and their catalytic activity in CO oxidation was tested either as synthesized or after on-line pretreatment in O2-He at 500 °C. A promotional effect of TiO2 on the activity of gold catalysts was observed upon 500 °C-pretreatment. The catalyst stability as a function of time on stream was tested in the absence or presence of H2, and physiochemical characterization applying BET, ICP-OES, XRD, TEM, and 27Al MAS NMR was conducted.

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