In Situ Study of the Gas-Phase Electrolysis of Water on Platinum by NAP-XPS

Authors

  • Dr. Rosa Arrigo,

    Corresponding author
    1. Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany)
    2. Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34–36, 45470 Mülheim an der Ruhr (Germany)
    • Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany)

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  • Dr. Michael Hävecker,

    1. Helmholtz-Zentrum Berlin für Materialien und Energie, BESSY-II, Albert-Einstein-Strasse 15 12489 Berlin (Germany)
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  • Dr. Manfred E. Schuster,

    1. Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany)
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  • Dr. Chinmoy Ranjan,

    1. Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34–36, 45470 Mülheim an der Ruhr (Germany)
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  • Eugen Stotz,

    1. Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany)
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  • Dr. Axel Knop-Gericke,

    1. Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany)
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  • Prof. Dr. Robert Schlögl

    1. Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4–6, 14195 Berlin (Germany)
    2. Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34–36, 45470 Mülheim an der Ruhr (Germany)
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  • We thank Achim Klein-Hoffmann (FHI) for preparation of cross-section TEM samples and Youngmi Yi for help in conventional electrochemical measurements. We thank Dr. Detre Teschner and Dr. Tulio Rocha Costa Rizuti for help in improving the manuscript. We thank Bessy II staff for their continuing support during the XPS measurements. NAP-XPS=near-ambient-pressure X-ray photoelectron spectroscopy.

Abstract

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Chasing down the active state: Near-ambient-pressure X-ray photoelectron spectroscopy was used to study the surface of a Pt electrode during the oxygen evolution reaction (OER). A hydrated Pt metal phase with dissolved oxygen in the near-surface region is OER-active and considered to be the precursor of the analytically detected PtO2, which is in fact the deactivation product of the electrode.

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