The effect of thermal treatment on the atomic structure of PtCu core-shell nanoparticles in PtCu/C electrocatalysts

Nanocatalysts PtCu/C with core-shell structure of PtCu nanoparticles were synthesized by the method of sequential chemical reduction of Cu2+ and Pt(IV) in carbon suspension, prepared on the basis of ethylene glycol-water solvent. The characterization of atomic structure of "as prepared" Pt...

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-05, Vol.848 (1), p.12018
Main Authors: Shemet, D B, Pryadchenko, V V, Srabionyan, V V, Belenov, S B, Mikheykin, A S, Avakyan, L A, Guterman, V E, Bugaev, L A
Format: Article
Language:English
Subjects:
Atomic structure
Chemical reduction
Copper
Core-shell particles
Core-shell structure
Electrocatalysts
Ethylene glycol
Fine structure
Heat treatment
Intermetallic compounds
Nanoparticles
Parameters
Physics
Platinum
Structural analysis
X ray absorption
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Summary:Nanocatalysts PtCu/C with core-shell structure of PtCu nanoparticles were synthesized by the method of sequential chemical reduction of Cu2+ and Pt(IV) in carbon suspension, prepared on the basis of ethylene glycol-water solvent. The characterization of atomic structure of "as prepared" PtCu nanoparticles and obtained after thermal treatment at 350 °C was performed by Pt L3- and Cu K-edge extended X-ray absorption fine structure (EXAFS), complemented with TEM and XRD studies. The processing of EXAFS was performed by the technique that enables to reduce the effect of correlations among fitting parameters on the determined values of local structure parameters of the absorbing atoms, which have the nearest surrounding consisting both Pt and Cu atoms.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/848/1/012018