| Issue |
BIO Web Conf.
Volume 93, 2024
International Scientific Forestry Forum 2023: Forest Ecosystems as Global Resource of the Biosphere: Calls, Threats, Solutions (Forestry Forum 2023)
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|---|---|---|
| Article Number | 04012 | |
| Number of page(s) | 6 | |
| Section | Forest and Water, Forest Hydrology, Monitoring and Protection | |
| DOI | https://doi.org/10.1051/bioconf/20249304012 | |
| Published online | 20 March 2024 | |
Synthesis and study of some physicochemical features of Co-Pt nanostructured system
1 Federal Research Center of Coal and Coal Chemistry of SB RAS, 650000, Kemerovo
2 Federal Research Center Boreskov Institute of Catalysis of SB RAS, 630090, Novosibirsk
* Corresponding author: 2metil4@gmail.com
In the work by methods of XRD, TEM, SAED, XPS combined with mass-spectrometry of gaseous products, SAXS, and elemental analysis of samples the phase compositions and morphology of particles of nanostructured Co-Pt system synthesized by the method of reduction of hydrazine-hydrate aqueous solutions of precursors were studied (in the region rich in Pt for the first time). It was found that in the composition range up to ≈ 60 at. % Co. XRD-analysis of synthesized samples fixes as the only FCC phase of solid solution of Co in Pt, with the established upper limit of solubility %18±1 at. At the content of Co above the limit, along with it, the X-ray diffraction unregistered phases with the content of Co above the limit in solid solution are also formed. Their presence was confirmed by the SAXS method, and their metallic nature (not oxide-hydroxide) nature follows from the results of XRD, SAED. When FCC phase formed metal reduction process proceeded directly without cobalt hydroxides forming. According to results of XPS with the Ar-etching of samples there were internal platinum-rich sub-regions in Co-Pt nanoalloys.
© The Authors, published by EDP Sciences, 2024
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