Side Reaction in Catalytic CVD Growth of Carbon Nanotubes: Surface Pyrolysis of a Hydrocarbon Precursor with the Formation of Lateral Carbon Deposits | Sciact - CRIS-system of Boreskov Institute of Catalysis

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

Journal

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

Output data

Year: 2018, Volume: 139, Pages: 105-117 Pages count : 13 DOI: 10.1016/j.carbon.2018.06.033

Tags

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

Authors

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

Affiliations

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

Funding (2)

1	Federal Agency for Scientific Organizations	0303-2016-0003
2	The Ministry of Education and Science of the Russian Federation	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 ANCAN OpenAlex

Submitted:	Jan 17, 2018
Accepted:	Jun 14, 2018
Published online:	Jun 18, 2018
Published print:	Nov 1, 2018

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

DB	Citing
Web of science	16
Scopus	20
Elibrary	21
OpenAlex	23