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Metal Phosphates as a New Class of Supports for Gold Nanocatalysts

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Abstract

Oxides and carbon are commonly used as supports for gold nanoparticles, but metal salts are barely considered as suitable supports. Our group recently communicated that gold nanoparticles supported on nanosized LaPO4 (6–8 nm) are active for CO oxidation (Yan et al., Angew Chem Int Ed 45:3614, 2006). In the current work, we systematically developed an array of Au/M–P–O catalysts and tested them for catalytic activity and stability. It was found that 200 °C-pretreated Au/M–P–O (M = Ca, Fe, Co, Y, La, Pr, Nd, Sm, Eu, Ho, Er) show high CO conversions below 50 °C, and 500 °C-pretreated Au/M–P–O (M = Ca, Y, La, Pr, Nd, Sm, Eu, Ho, Er) show high CO conversions below 100 °C. These samples were characterized by ICP-OES, BET, XRD, TEM, SEM, and H2-TPR. The stability of selected catalysts was studied as a function of time on stream. This work furnishes a new catalyst system for further fundamental and applied research.

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Acknowledgements

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 Z. Ma and H.F. Yin to the ORNL Research Associates Program, administered jointly by ORNL and the Oak Ridge Associated Universities.

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Authors and Affiliations

  1. Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    Zhen Ma, Hongfeng Yin, Steven H. Overbury & Sheng Dai

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  1. Zhen Ma
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  2. Hongfeng Yin
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  3. Steven H. Overbury
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  4. Sheng Dai
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Correspondence to Sheng Dai.

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Ma, Z., Yin, H., Overbury, S.H. et al. Metal Phosphates as a New Class of Supports for Gold Nanocatalysts. Catal Lett 126, 20–30 (2008). https://doi.org/10.1007/s10562-008-9627-x

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  • DOI: https://doi.org/10.1007/s10562-008-9627-x

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