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Observing the oxidation of platinum

Author

Listed:
  • Matthijs A. Spronsen

    (Leiden University
    Harvard University)

  • Joost W. M. Frenken

    (Leiden University
    Advanced Research Center for Nanolithography (ARCNL))

  • Irene M. N. Groot

    (Leiden University
    Leiden University)

Abstract

Despite its importance in oxidation catalysis, the active phase of Pt remains uncertain, even for the Pt(111) single-crystal surface. Here, using a ReactorSTM, the catalytically relevant structures are identified as two surface oxides, different from bulk α-PtO2, previously observed. They are constructed from expanded oxide rows with a lattice constant close to that of α-PtO2, either assembling into spoked wheels, 1–5 bar O2, or closely packed in parallel lines, above 2.2 bar. Both are only ordered at elevated temperatures (400–500 K). The triangular oxide can also form on the square lattice of Pt(100). Under NO and CO oxidation conditions, similar features are observed. Furthermore, both oxides are unstable outside the O2 atmosphere, indicating the presence of active O atoms, crucial for oxidation catalysts.

Suggested Citation

  • Matthijs A. Spronsen & Joost W. M. Frenken & Irene M. N. Groot, 2017. "Observing the oxidation of platinum," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00643-z
    DOI: 10.1038/s41467-017-00643-z
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    Cited by:

    1. Jan Knudsen & Tamires Gallo & Virgínia Boix & Marie Døvre Strømsheim & Giulio D’Acunto & Christopher Goodwin & Harald Wallander & Suyun Zhu & Markus Soldemo & Patrick Lömker & Filippo Cavalca & Mattia, 2021. "Stroboscopic operando spectroscopy of the dynamics in heterogeneous catalysis by event-averaging," Nature Communications, Nature, vol. 12(1), pages 1-8, December.

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