Preparation of Ni-Cu Catalyst for Carbon Nanofiber Production by the Mechanochemical Route
Научная публикация
| Общая информация |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
В печати (In Press),
Оригинальность:
Оригинальная
|
| Конференция |
6th International Conference on Catalysis and Chemical Engineering
22-26 февр. 2022
,
San Francisco
|
| Журнал |
Topics in Catalysis
ISSN: 1022-5528
, E-ISSN: 1572-9028
|
| Вых. Данные |
Год: 2023,
DOI:
10.1007/s11244-022-01739-7
|
| Ключевые слова |
nickel-copper solid solution, mechanochemical alloying, ethylene, carbon erosion, carbon nanofibers |
| Авторы |
Afonnikova Sofya D.
1
,
Mishakov Ilya V.
1
,
Bauman Yury I.
1
,
Trenikhin Mikhail V.
2
,
Shubin Yury V.
3
,
Serkova Alexandra N.
1
,
Vedyagin Aleksey A.
1
|
| Организации |
| 1 |
Boreskov Institute of Catalysis SB RAS, 5 Lavrentyev Ave., Novosibirsk, Russia 630090
|
| 2 |
Center of New Chemical Technologies BIC SB RAS, 54 Neftezavodskaya St., Omsk, Russia 644040
|
| 3 |
Nikolaev Institute of Inorganic Chemistry of SB RAS, 3 Lavrentyev Ave., Novosibirsk, Russia 630090
|
|
Информация о финансировании (1)
|
1
|
Министерство науки и высшего образования Российской Федерации
|
0239-2021-0010
|
The development of effective catalytic systems for the synthesis of carbon nanomaterials by catalytic pyrolysis is a relevant direction for modern science. In this work, the peculiarities of the microdispersed alloy Ni0.89Cu0.11 synthesis by mechanochemical alloying of metal powders in a planetary mill were investigated. The evolution of morphology and phase composition of Ni-Cu composite depending on the diameter of the milling balls and the activation time was studied using X-ray diffraction and particle size analyses, and scanning electron microscopy. The conditions corresponding to the formation of a single-phase Ni-Cu solid solution were determined and a scheme for the appearance of microdispersed alloy particles during the activation process was proposed. The prepared samples of the Ni-Cu composite were tested as catalyst precursors in the ethylene decomposition at 550 °C accompanied with the formation of carbon filaments. An extreme character of the carbon yield dependence on the activation time was found. The maximum carbon yield of 68-78 g/gcat after 15 min of reaction was achieved on the sample activated for 5-7 min and possessing slab morphology. The complete disintegration of the microdispersed Ni-Cu alloy was observed after ~1 min of a contact with the reaction medium. The resulting active particles were shown to catalyze the growth of carbon filaments. According to EDX data, the average content of copper in the composition of the active particles was estimated to be equal to its initial concentration in the alloy (~ 12 at.%).