Electrochemical production, characterization, and application of MWCNTs

Dimitrov, Aleksandar and Tomova, Ana and Grozdanov, Anita and Popovski, Orce and Paunovic, Perica (2013) Electrochemical production, characterization, and application of MWCNTs. Journal of Solid State Electrochemistry Current Research and Development in Science and Technology, 17 (2). pp. 399-407. ISSN 1432-8488

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The subject of this study is production of carbon nanotubes (CNTs) using an original procedure of reduction of lithium molten salts onto graphite cathode; their structural
characterization and application as support material for electrocatalysts aimed for hydrogen evolution. As-produced
CNTs were characterized by means of scanning and transmission electron microscopy (SEM and TEM), Raman spectroscopy, and thermogravimetric and differential thermal
analysis (DTA). SEM and TEM images have shown that
nanotubes are mostly of curved shape with length of 1–
20 μm and diameter of 20–40 nm. Raman peaks indicate
that the crystallinity of produced nanotubes is rather low.
The obtained results suggest that formed product contains
up to 80 % multiwalled carbon nanotubes (MWCNTs), while the rest being non-reacted graphite and fullerenes.
DTA curves show that combustion process of the nanotubes
takes place in two stages, i.e., at 450 and 720 °C. At the
lower temperature, combustion of MWCNTs occurs, while at higher one, fullerenes and non-reacted graphite particles
burn. As-produced MWCNTs were used as electrocatalyst’s
support materials and their performance was compared with
that of traditional carbon support material Vulcan XC-72.
MWNTs have shown almost twice higher real surface area,
and electrocatalyst deposited on them showed better catalytic activity than corresponding one deposited on Vulcan XC-72.
Keywords: Multiwalled carbon nanotubes (MWCNTs),
Intercalation, Graphite, Molten salts electrolysis, Support material, Hydrogen evolution

Item Type: Article
Subjects: Engineering and Technology > Nano-technology
Divisions: Military Academy
Depositing User: Orce Popovski
Date Deposited: 23 Jan 2013 15:03
Last Modified: 23 Jan 2013 15:03
URI: https://eprints.ugd.edu.mk/id/eprint/5050

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