Comparison of Fe/Al2O3 and Fe,Co/Al2O3 catalysts used for production of carbon nanotubes from acetylene by CCVD

Konya, Z [Kónya, Zoltán (Nanotechnológia), author]; Vesselenyi, I [Vesselényi, István (Vesselenyi I), author]; Lazar, K [Lázár, Károly (Fizikai kémia, ra...), author] Institute of Isotopes, Hungarian Academy of Sci... (MTA EK); Kiss, J [Kiss, János (Fizikai kémia), author] MTA-SZTE Reakciókinetikai Kutatócsoport (2007-t... (SZTE / TTK / KTCS); Kiricsi, I [Kiricsi, Imre (Zeolitkémia), author] Department of Applied and Environmental Chemistry (SZTE / TTIK / KTCS)

English Conference paper (Chapter in Book) Scientific
Published: Vajtai R. Nanotechnology. (2003) ISBN:0819449784 pp. 296-304
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    Subjects:
    • Physical chemistry, Polymer science, Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
    • Chemical sciences
    Characterization of iron containing alumina supported catalysts was performed by TEM, Mossbauer and XPS spectroscopy during formation of multiwall carbon nanotubes from acetylene at 1000 K TEM images showed that carbon fibers (outer diameter is around 20-40 mn) were generated on Fe/Al2O3 Samples while on the bimetallic Fe,Co/Al2O3 carbon nanotubes with an average diameter of 8-12 nm were formed. XPS spectra revealed that Fe-Co alloy formed during the interaction. of Fe,Co/Al2O3 and acetylene at 1000 K. The formation of the bimetallic alloy was proven by Mossbauer spectroscopy as well.
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    2025-04-25 07:16