Atomic-Scale Interface for Pt Nanoparticles on SrTiO 3 (001)

Chen, Yanna; Das, Anusheela; Duplessis, Isaiah D.; Keane, Denis T.; Bedzyk, Michael J.

doi:10.1021/acsami.3c19560

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Atomic-Scale Interface for Pt Nanoparticles on SrTiO 3 (001)

Chen, Yanna·Das, Anusheela·Duplessis, Isaiah D.·Keane, Denis T.·Bedzyk, Michael J.

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Abstract

The interfacial structure formed by Pt nanoparticles grown epitaxially on a SrTiO 3 (001) surface by pulsed laser deposition was studied by X-ray standing-wave (XSW) excited core-level photoelectron emission. The XSW-generated 3D atomic map of the Pt and interfacial oxygens for the oxidized Pt/SrTiO 3 interface differs significantly from that of the as-deposited interface. After oxidation, the Pt atoms shifted upward and their atomic occupation at fcc-like sites evolved as the oxidation temperature increased. Interfacial oxygen atoms were differentiated from bulk O atoms by the chemical shift in the binding energy of their 1s electrons. After oxidation, the interfacial oxygen atoms rearranged to form a TiO 2 bilayer at the interface. Furthermore, these results provide a more complete description of the strong metal–support interaction process at the interface.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY X-ray standing waves interface metal nanoparticles nanoparticles oxidation oxygen platinum strontium titanate

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Chen, Yanna, Das, Anusheela, Duplessis, Isaiah D., Keane, Denis T., Bedzyk, Michael J.. 2024-05-10. Atomic-Scale Interface for Pt Nanoparticles on SrTiO 3 (001). https://doi.org/10.1021/acsami.3c19560

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