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Novel Au/TiO2/Al2O· xH2O catalysts for CO oxidation

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Abstract

Au/Al2O· xH2O and Au/TiO2/Al2O· xH2O (x = 0–3) catalysts were prepared by assembling gold nanoparticles on neat and TiO2-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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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.

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Correspondence to Sheng Dai.

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Yan, W.F., Ma, Z., Mahurin, S.M. et al. Novel Au/TiO2/Al2O· xH2O catalysts for CO oxidation. Catal Lett 121, 209–218 (2008). https://doi.org/10.1007/s10562-007-9369-1

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  • DOI: https://doi.org/10.1007/s10562-007-9369-1

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