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Platinum colloid supported on graphite: X-ray photoelectron spectroscopy study

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Abstract

Two states of platinum, Pt0 and Pt+δ, with the binding energy of the Pt(4f7/2) line at 71.4±0.1 and 72.2±0.3 eV, are revealed by XPS in colloidal platinum deposited onto graphite. The latter state is assigned to surface Pt atoms partially oxidized due to the interaction with water and/or oxygen-terminated sulfonate group in an organic shell. The colloid deposition is found to be temperature dependent with the apparent activation energy of ∼40 kJ/mol.

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Authors and Affiliations

  1. Boreskov Institute of Catalysis, 630090, Novosibirsk, Russia

    Sh. K. Shaikhutdinov

  2. Abteilung Oberflächenchemie und Katalyse, Universität Ulm, 89069, Ulm/Donau, Germany

    M. Schildenberger & M. Noeske

  3. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, Berlin, Germany

    G. Mestl

Authors
  1. Sh. K. Shaikhutdinov
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  2. M. Schildenberger
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  3. M. Noeske
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  4. G. Mestl
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Shaikhutdinov, S.K., Schildenberger, M., Noeske, M. et al. Platinum colloid supported on graphite: X-ray photoelectron spectroscopy study. React Kinet Catal Lett 67, 129–135 (1999). https://doi.org/10.1007/BF02475838

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  • DOI: https://doi.org/10.1007/BF02475838

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