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Effect of Co-Mo catalyst preparation and CH4/H2 flow on carbon nanotube synthesis

Lobiak, Egor V. and Kuznetsova, Viktoriia R. and Flahaut, Emmanuel and Okotrub, Alexander V. and Bulusheva, Lyubov G. Effect of Co-Mo catalyst preparation and CH4/H2 flow on carbon nanotube synthesis. (2020) Fullerenes Nanotubes and Carbon Nanostructures, 28 (9). 1-9. ISSN 1536-383X

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Official URL: https://doi.org/10.1080/1536383X.2020.1749051

Abstract

Supported Co-Mo catalysts with a given ratio of metals were prepared from polyoxomolybdate Mo12O28(μ2-OH)12{Со(H2O)3}4 using impregnation and combustion methods. Effects of the type of catalyst and the ratio and flow of methane and hydrogen gases on the structure of carbon nanotubes (CNTs) synthesized by catalytic chemical vapor deposition (CCVD) method were studied using transmission electron microscopy and Raman spectroscopy. The catalyst prepared by combustion method yielded mainly individualized CNTs, while the CNTs were highly entangled or bundled when impregnation method was used. In both cases, addition of hydrogen to methane led to reduction of the CNT yield. The samples synthesized using two different catalysts and the same CH4/H2 ratio and flow of gases were tested in electrochemical capacitors. A higher specific surface area of the CNTs grown over impregnation-prepared catalyst caused a better performance at scan rates from 2 to 1000 mV/s.

Item Type:Article
HAL Id:hal-02879733
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Nikolaev Institute of Inorganic Chemistry - NIIC SB RAS (RUSSIA)
Other partners > Novosibirsk State Technical University (RUSSIA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Funders:
Russian Foundation for Basic Research - Novosibirsk State Technical University
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Deposited On:24 Jun 2020 09:03

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