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Size effect in the oxidation of platinum nanoparticles on graphite with nitrogen dioxide: An XPS and STM study

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Abstract

The interaction of NO2 with model catalysts prepared by platinum evaporation onto the surface of highly oriented pyrolytic graphite has been investigated at room temperature and a pressure of 3 × 10−6 Torr by X-ray photoelectron spectroscopy and scanning tunneling microscopy. In the catalyst containing only small (<2.5 nm) platinum particles, these particles oxidize to PtO and PtO2. The action of NO2 on the graphite support and on the graphite-supported Pt catalyst causes graphite oxidation. The oxygen concentration in the model catalyst is higher than on the support. This is supposed to be due to the spillover of oxygen atoms from platinum particles to graphite.

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Authors and Affiliations

  1. Boreskov Institute of Catalysis, Siberian Branch, Russia Academy of Sciences, Novosibirsk, 630090, Russia

    A. V. Kalinkin, A. M. Sorokin, M. Yu. Smirnov & V. I. Bukhtiyarov

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  1. A. V. Kalinkin
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  2. A. M. Sorokin
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  3. M. Yu. Smirnov
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  4. V. I. Bukhtiyarov
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Correspondence to A. V. Kalinkin.

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Original Russian Text © A.V. Kalinkin, A.M. Sorokin, M.Yu. Smirnov, V.I. Bukhtiyarov, 2014, published in Kinetika i Kataliz, 2014, Vol. 55, No. 3, pp. 371–378.

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Kalinkin, A.V., Sorokin, A.M., Smirnov, M.Y. et al. Size effect in the oxidation of platinum nanoparticles on graphite with nitrogen dioxide: An XPS and STM study. Kinet Catal 55, 354–360 (2014). https://doi.org/10.1134/S0023158414030045

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  • DOI: https://doi.org/10.1134/S0023158414030045

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