Porous Co-Pt Nanoalloys for Production of Carbon Nanofibers and Composites
Научная публикация
| Общая информация |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| 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, 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
|
|
Информация о финансировании (2)
|
1
|
Министерство науки и высшего образования Российской Федерации
|
0239-2021-0010
|
|
2
|
Российский научный фонд
|
21-13-00414 (121041300222-6)
|
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.