Side Reaction in Catalytic CVD Growth of Carbon Nanotubes: Surface Pyrolysis of a Hydrocarbon Precursor with the Formation of Lateral Carbon Deposits | Sciact - CRIS-система Института катализа

Side Reaction in Catalytic CVD Growth of Carbon Nanotubes: Surface Pyrolysis of a Hydrocarbon Precursor with the Formation of Lateral Carbon Deposits Научная публикация

Журнал

Carbon
ISSN: 0008-6223 , E-ISSN: 1873-3891

Вых. Данные

Год: 2018, Том: 139, Страницы: 105-117 Страниц : 13 DOI: 10.1016/j.carbon.2018.06.033

Ключевые слова

Activation energy; Carbon carbon composites; Deposits; Differential thermal analysis; Ethylene; Nondestructive examination; Petroleum deposits; Pyrolysis; Synchrotron radiation; Temperature distribution; Yarn

Авторы

Krasnikov Dmitry V. ^1,2 , Kuznetsov Vladimir L. ^1,3 , Romanenko Anatoly I. ⁴ , Shmakov Alexander N. ¹

Организации

1	Boreskov Institute of Catalysis, SB RAS, Lavrentieva ave. 5, Novosibirsk 630090, Russia
2	Skolkovo Institute of Science and Technology, Nobelya str. 3, Moscow 143025, Russia
3	National University of Science and Technology (MISIS), Leninskiy ave. 4, Moscow 119049, Russia
4	Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentieva ave. 3, Novosibirsk 630090, Russia

Информация о финансировании (2)

1	Федеральное агентство научных организаций России	0303-2016-0003
2	Министерство образования и науки Российской Федерации	К3-2017-040

Here we have studied the kinetics of the ethylene non-catalytic decomposition on the surface of multi-walled carbon nanotubes (MWCNTs) leading to the formation of lateral carbon deposits (LCD). Despite the comprehensive data on the gas-phase pyrolysis and a clear presence of surface impurities formed of carbon deposits, this process has not gained any proper attention. Within the temperature range studied (650–750 °C), we have found the rate of the reaction to be proportional to the MWCNT surface area and ethylene partial pressure. The activation energy of carbon deposition is close to that for the collision of two ethylene molecules to form C2H5· and C2H3· radicals. Based on the data obtained, we have proposed the radical mechanism of the formation of the deposits. High-resolution TEM, synchrotron radiation XRD, Raman spectroscopy, differential thermal analysis, temperature dependence of conductivity, and surface area measurements were used to characterize the structure and properties of the carbon-carbon composite produced. We have shown the deposition of lateral carbon to be a soft non-destructive technique for MWCNT surface functionalization allowing one to tune the properties of 3D-structured nanotube materials (e.g. arrays or aerogels). As an example, the LCD coating gradually changes the conductivity mechanism to 3D variable range hopping.

Krasnikov D.V. , Kuznetsov V.L. , Romanenko A.I. , Shmakov A.N.
Side Reaction in Catalytic CVD Growth of Carbon Nanotubes: Surface Pyrolysis of a Hydrocarbon Precursor with the Formation of Lateral Carbon Deposits
Carbon. 2018. V.139. P.105-117. DOI: 10.1016/j.carbon.2018.06.033 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	17 янв. 2018 г.
Принята к публикации:	14 июн. 2018 г.
Опубликована online:	18 июн. 2018 г.
Опубликована в печати:	1 нояб. 2018 г.

Web of science:	WOS:000446063100013
Scopus:	2-s2.0-85049309177
РИНЦ:	35758759
Chemical Abstracts:	2018:1208883
Chemical Abstracts (print):	169:138946
OpenAlex:	W2809523197

БД	Цитирований
Web of science	14
Scopus	17
РИНЦ	18
OpenAlex	19