Abstract
Deposited electrocatalysts with different distributions of components in PtCu bimetallic nanoparticles involved in their composition were synthesized by simultaneous and sequential reduction of Cu(2+) and Pt(IV) in a carbon suspension. The dependence of the atomic structure of PtCu nanoparticles on the synthesis conditions and the degree of influence of post-treatment was established from analysis of the changes in Fourier transforms of the experimental Pt and Cu EXAFS spectra, as well as the structural parameters obtained by their fitting before and after the treatment of the materials in an acid solution. A technique was proposed for visualizing the atomic structure of synthesized bimetallic nanoparticles. This technique made it possible to determine the character of the distribution of the components over the nanoparticle volume in accordance with the component composition and local atomic structure parameters determined from EXAFS spectroscopy and to obtain the visualization of the distribution of the components in PtCu nanoparticles synthesized by the aforementioned methods.
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Original Russian Text © V.V. Srabionyan, V.V. Pryadchenko, A.A. Kurzin, S.V. Belenov, L.A. Avakyan, V.E. Guterman, L.A. Bugaev, 2016, published in Fizika Tverdogo Tela, 2016, Vol. 58, No. 4, pp. 730–739.
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Srabionyan, V.V., Pryadchenko, V.V., Kurzin, A.A. et al. Atomic structure of PtCu nanoparticles in PtCu/C catalysts from EXAFS spectroscopy data. Phys. Solid State 58, 752–762 (2016). https://doi.org/10.1134/S1063783416040247
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DOI: https://doi.org/10.1134/S1063783416040247