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Influence of the Support Crystal Structure of WO3/Au Catalysts in CO Oxidation

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Abstract

Gold nanoparticles (partially below 5 nm in diameter) were successfully deposited on hexagonal and monoclinic WO3 supports by deposition–precipitation, which had been considered previously not feasible owing to the low isoelectronic point of WO3. The catalysts were characterized by TEM, SEM, N2-adsorption, XRD, and XPS. In CO oxidation m-WO3/Au showed better catalytic activity over 100 °C than h-WO3/Au. This was explained by that m-WO3 had higher surface OH coverage, resulting in larger Au nanoparticle loading and thus better catalytic activity.

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Acknowledgments

I. M. Szilágyi thanks for a János Bolyai Research Fellowship of the Hungarian Academy of Sciences and a Marie Curie Intra-European Fellowship (PIEF-GA-2009-235655). TÉT_10-1-2011-0045 and OTKA-PD-109129 Grants are gratefully acknowledged. Consultation with Dr. Ferenc Somodi (Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, USA) about the catalysis test results is acknowledged.

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Authors and Affiliations

  1. Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, Budapest, 1111, Hungary

    Tamás Firkala, Balázs Fórizs & Imre Miklós Szilágyi

  2. Institute of Materials and Environmental Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59–67, Budapest, 1025, Hungary

    Tamás Firkala, Eszter Drotár & András Tompos

  3. Institute for Technical Physics and Materials Science, Research Centre of Natural Sciences, Hungarian Academy of Sciences, Konkoly–Thege út 29–33, Budapest, 1121, Hungary

    Attila L. Tóth

  4. Department of Atomic Physics, Budapest University of Technology and Economics, Budafoki út 8, Budapest, 1111, Hungary

    Katalin Varga-Josepovits

  5. Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, P.O. Box 92, Budapest, 1521, Hungary

    Krisztina László

  6. Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00550, Helsinki, Finland

    Markku Leskelä & Imre Miklós Szilágyi

  7. Technical Analytical Chemistry Research Group of the Hungarian Academy of Sciences, Budapest University of Technology and Economics, Szt. Gellért tér 4, Budapest, 1111, Hungary

    Imre Miklós Szilágyi

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  1. Tamás Firkala
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  2. Balázs Fórizs
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  3. Eszter Drotár
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  5. Attila L. Tóth
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  6. Katalin Varga-Josepovits
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  7. Krisztina László
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  8. Markku Leskelä
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  9. Imre Miklós Szilágyi
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Correspondence to Imre Miklós Szilágyi.

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Firkala, T., Fórizs, B., Drotár, E. et al. Influence of the Support Crystal Structure of WO3/Au Catalysts in CO Oxidation. Catal Lett 144, 831–836 (2014). https://doi.org/10.1007/s10562-014-1217-5

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  • DOI: https://doi.org/10.1007/s10562-014-1217-5

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