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Phase behavior of Pt–Cu nanoparticles with different architecture upon their thermal treatment

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Abstract

Using the methods of powder X-ray diffraction, transmission electron microscopy, and EXAFS spectroscopy, the phase behavior of bimetallic Pt–Cu nanoparticles with different architecture that are deposited on a highly disperse carbon carrier has been investigated during their thermal treatment in inert atmosphere. It is established that Pt–Cu nanoparticles with a Cu-core–Pt-shell structure rearrange into nanoparticles with a Pt–Cu solid-solution structure in the temperature range from 280 to 300°C. This transformation is accompanied by a sharp change in the unit-cell parameter. Such a change in the crystal lattice parameter does not occur during the thermal treatment of material with similar composition containing Pt–Cu nanoparticles with a solid-solution structure. The results can be used in elucidating the structure of Pt–M/C materials with different nanoparticle architectures.

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Authors and Affiliations

  1. Southern Federal University, Rostov-on-Don, 344090, Russia

    S. V. Belenov, V. A. Volochaev, V. V. Pryadchenko, V. V. Srabionyan, D. B. Shemet & V. E. Guterman

  2. MISiS National Research Technological University, Moscow, 119991, Russia

    N. Yu. Tabachkova

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  1. S. V. Belenov
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Correspondence to S. V. Belenov.

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Original Russian Text © S.V. Belenov, V.A. Volochaev, V.V. Pryadchenko, V.V. Srabionyan, D.B. Shemet, N.Yu. Tabachkova, V.E. Guterman, 2017, published in Rossiiskie Nanotekhnologii, 2017, Vol. 12, Nos. 3–4.

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Belenov, S.V., Volochaev, V.A., Pryadchenko, V.V. et al. Phase behavior of Pt–Cu nanoparticles with different architecture upon their thermal treatment. Nanotechnol Russia 12, 147–155 (2017). https://doi.org/10.1134/S1995078017020033

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