Porous Co-Pt nanoalloys for production of carbon nanofibers and composites Full article
| Journal |
Materials
ISSN: 1996-1944 |
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| Output data | Year: 2022, Volume: 15, Number: 21, Article number : 7456, Pages count : 15 DOI: 10.3390/ma15217456 | ||||||
| Tags | cobalt; platinum; porous nanoalloys; X-ray diffraction; alloy catalysts; carbon nanofibers | ||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0010 (АААА-А21-121011390054-1) |
| 2 | Russian Science Foundation | 21-13-00414 |
Abstract:
The controllable synthesis of carbon nanofibers (CNF) and composites based on CNF (Metals/CNF) is of particular interest. In the present work, the samples of CNF were produced via ethylene decomposition over Co-Pt (0–100 at.% Pt) microdispersed alloys prepared by a reductive thermolysis of multicomponent precursors. XRD analysis showed that the crystal structure of alloys in the composition range of 5–35 at.% Pt corresponds to a fcc lattice based on cobalt (Fm-3m), while the CoPt (50 at.% Pt) and CoPt3 (75 at.% Pt) samples are intermetallics with the structure P4/mmm and Pm-3m, respectively. The microstructure of the alloys is represented by agglomerates of polycrystalline particles (50–150 nm) interconnected by the filaments. The impact of Pt content in the Co1−xPtx samples on their activity in CNF production was revealed. The interaction of alloys with ethylene is accompanied by the generation of active particles on which the growth of nanofibers occurs. Plane Co showed low productivity (~5.5 g/gcat), while Pt itself exhibited no activity at all. The addition of 15–25 at.% Pt to cobalt catalyst leads to an increase in activity by 3–5 times. The maximum yield of CNF reached 40 g/gcat for Co0.75Pt0.25 sample. The local composition of the active alloyed particles and the structural features of CNF were explored.
Cite:
Afonnikova S.D.
, Popov A.A.
, Bauman Y.I.
, Plyusnin P.E.
, Mishakov I.V.
, Trenikhin M.V.
, Shubin Y.V.
, Vedyagin A.A.
, Korenev S.V.
Porous Co-Pt nanoalloys for production of carbon nanofibers and composites
Materials. 2022. V.15. N21. 7456 :1-15. DOI: 10.3390/ma15217456 WOS Scopus РИНЦ OpenAlex
Porous Co-Pt nanoalloys for production of carbon nanofibers and composites
Materials. 2022. V.15. N21. 7456 :1-15. DOI: 10.3390/ma15217456 WOS Scopus РИНЦ OpenAlex
Dates:
| Submitted: | Oct 3, 2022 |
| Accepted: | Oct 21, 2022 |
| Published print: | Oct 24, 2022 |
| Published online: | Oct 24, 2022 |
Identifiers:
| Web of science: | WOS:000881222000001 |
| Scopus: | 2-s2.0-85141848552 |
| Elibrary: | 50393584 |
| OpenAlex: | W4307262109 |