Porous Co-Pt nanoalloys for production of carbon nanofibers and composites | Sciact

Porous Co-Pt nanoalloys for production of carbon nanofibers and composites Научная публикация

Журнал

Materials
ISSN: 1996-1944

Вых. Данные

Год: 2022, Том: 15, Номер: 21, Номер статьи : 7456, Страниц : 15 DOI: 10.3390/ma15217456

Ключевые слова

cobalt; platinum; porous nanoalloys; X-ray diffraction; alloy catalysts; carbon nanofibers

Авторы

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

Организации

1	Boreskov Institute of Catalysis SB RAS
2	Nikolaev Institute of Inorganic Chemistry of SB RAS
3	Center of New Chemical Technologies BIC SB RAS

Информация о финансировании (2)

1	Министерство науки и высшего образования Российской Федерации	0239-2021-0010 (АААА-А21-121011390054-1)
2	Российский научный фонд	21-13-00414

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.

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

Поступила в редакцию:	3 окт. 2022 г.
Принята к публикации:	21 окт. 2022 г.
Опубликована в печати:	24 окт. 2022 г.
Опубликована online:	24 окт. 2022 г.

Web of science:	WOS:000881222000001
Scopus:	2-s2.0-85141848552
РИНЦ:	50393584
OpenAlex:	W4307262109

БД	Цитирований
Web of science	4
OpenAlex	12
Scopus	8