Premium
Fe–Mo and Co–Mo Catalysts with Varying Composition for Multi‐Walled Carbon Nanotube Growth
Author(s) -
Kazakova Mariya A.,
Kuznetsov Vladimir L.,
BokovaSirosh Sofia N.,
Krasnikov Dmitry V.,
Golubtsov Georgiy V.,
Romanenko Anatoliy I.,
Prosvirin Igor P.,
Ishchenko Arcadiy V.,
Orekhov Andrey S.,
Chuvilin Andrey L.,
Obraztsova Elena D.
Publication year - 2018
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201700260
Subject(s) - bimetallic strip , catalysis , x ray photoelectron spectroscopy , materials science , carbon nanotube , raman spectroscopy , alloy , carbide , molybdenum , chemical engineering , composition (language) , nanotube , metal , analytical chemistry (journal) , nuclear chemistry , metallurgy , chemistry , nanotechnology , organic chemistry , linguistics , physics , philosophy , optics , engineering
The formation of active component of Fe–Mo and Co–Mo catalysts for carbon nanotube growth with variable Mo content is studied with in situ XRD, XPS, and STEM&EDX. The activation of bimetallic Fe–Mo catalysts under the growth conditions leads to the formation of Fe–Mo alloy particles in contrast to Co‐containing catalysts in which active alloy incorporates only a small portion of Mo (<2–3 at.%). The stable carbide formation for these systems is not detected. The effect of Mo content in Fe–Mo and Co–Mo catalysts on the properties of MWCNTs is additionally investigated using the Raman spectroscopy in combination with measurements of the temperature dependence of conductivity. It is shown that MWCNT defectiveness depends on the active component composition for both Fe–Mo and Co–Mo catalysts. The current carrier concentration for the MWCNTs grown on Fe–Mo catalysts slightly increases with the Mo content. The opposite effect is observed for the tubes grown on Co–Mo catalysts, showing a decrease in the current carrier concentration with the increase of Mo concentration.