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Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high temperatures in oxidizing atmospheres

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  • Wei-Zhen Li

    (Institute for Integrated Catalysis, Pacific Northwest National Laboratory)

  • Libor Kovarik

    (Institute for Integrated Catalysis, Pacific Northwest National Laboratory)

  • Donghai Mei

    (Institute for Integrated Catalysis, Pacific Northwest National Laboratory)

  • Jun Liu

    (Institute for Integrated Catalysis, Pacific Northwest National Laboratory)

  • Yong Wang

    (Institute for Integrated Catalysis, Pacific Northwest National Laboratory
    The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University)

  • Charles H. F. Peden

    (Institute for Integrated Catalysis, Pacific Northwest National Laboratory)

Abstract

The development of thermally stable, nanometer-sized precious metal-based catalysts remains a daunting challenge. Such materials, especially those based on the use of costly platinum metal, are essential and, to date, non-replaceable for a large number of industrially important catalytic processes. Here we report a well-defined cuboctahedral MgAl2O4 spinel support material that is capable of stabilizing platinum particles in the range of 1–3 nm on its relatively abundant {111} facets during extremely severe aging at 800 °C in air for 1 week. The aged catalysts retain platinum dispersions of 15.9% with catalytic activities for methanol oxidation being ~80% of that of fresh ones, whereas a conventional Pt/γ-Al2O3 catalyst is severely sintered and nearly inactive. We reveal the origin of the markedly superior ability of spinel {111} facets, resulting from strong interactions between spinel surface oxygens and epitaxial platinum {111} facets, inspiring the rational design of anti-sintering supported platinum group catalysts.

Suggested Citation

  • Wei-Zhen Li & Libor Kovarik & Donghai Mei & Jun Liu & Yong Wang & Charles H. F. Peden, 2013. "Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high temperatures in oxidizing atmospheres," Nature Communications, Nature, vol. 4(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3481
    DOI: 10.1038/ncomms3481
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