Effect of Thermal Treatment on the Atomic Structure and Electrochemical Characteristics of Bimetallic PtCu Core–Shell Nanoparticles in PtCu/C Electrocatalysts
| Autor: | D. B. Shemet, Lusegen A. Bugaev, Ivo Zizak, V. V. Srabionyan, Leon A. Avakyan, Karina E. Bdoyan, A. S. Mikheykin, Vladimir E. Guterman, V. A. Volochaev, V. V. Pryadchenko, S. V. Belenov |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
chemistry.chemical_element Nanoparticle 02 engineering and technology Thermal treatment 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy chemistry Chemical engineering Transmission electron microscopy Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Carbon Bimetallic strip Voltammetry |
| Zdroj: | The Journal of Physical Chemistry C. 122:17199-17210 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Supported PtCu/C electrocatalysts containing core–shell bimetallic PtCu nanoparticles were synthesized by sequential chemical reduction of Cu2+ and Pt(IV) in a carbon suspension, prepared on the basis of ethylene glycol–water solvent, and then treated at different temperatures in the range from 250 to 350 °C. The structural characterization of “as-prepared” PtCu nanoparticles and of those obtained after the thermal treatments was performed by transmission electron microscopy, X-ray diffraction, and Pt L3- and Cu K-edge extended X-ray absorption fine structure spectroscopy. The atomic cluster models of PtCu nanoparticles before and after the thermal treatment, reflecting the character of the components’ distribution, were generated. The electrochemical performance of the obtained PtCu/C electrocatalysts in oxygen reduction reaction was studied by cycling and linear voltammetry. |
| Databáze: | OpenAIRE |
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