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Porous Co-Pt Nanoalloys for Production of Carbon Nanofibers and Composites Full article

Journal Materials
ISSN: 1996-1944
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 Afonnikova Sofya D. 1 , Popov Anton A. 2 , Bauman Yury I. 1 , Plyusnin Pavel E. 2 , Mishakov Ilya V. 1 , Trenikhin Mikhail V. 3 , Shubin Yury V. 2 , Vedyagin Aleksey A. 1 , Korenev Sergey V. 2
Affiliations
1 Boreskov Institute of Catalysis SB RAS, 5 Lavrentyev Ave., 630090 Novosibirsk, Russia
2 Nikolaev Institute of Inorganic Chemistry of SB RAS, 3 Lavrentyev Ave., 630090 Novosibirsk, Russia
3 Center of New Chemical Technologies BIC SB RAS, 54 Neftezavodskaya St., 644065 Omsk, Russia

Funding (2)

1 Ministry of Science and Higher Education of the Russian Federation 0239-2021-0010
2 Russian Science Foundation 21-13-00414 (121041300222-6)

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 AN PMID OpenAlex publication_identifier_short.sciact_ihcp_identifier_type
Dates:
Submitted: Oct 3, 2022
Accepted: Oct 21, 2022
Published online: Oct 24, 2022
Published print: Nov 1, 2022
Identifiers:
Web of science: WOS:000881222000001
Scopus: 2-s2.0-85141848552
Elibrary: 50393584
Chemical Abstracts: 2022:2868634
PMID: 36363048
OpenAlex: W4307262109
publication_identifier.sciact_ihcp_identifier_type: 3913
Citing:
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Scopus 12
Web of science 12
Elibrary 17
OpenAlex 12
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