Comparison of Fe/Al 2 O 3 and Fe,Co/Al 2 O 3 catalysts used for production of carbon nanotubes from acetylene by CCVD

Zoltan Konya, Istvan Vesselenyi, Karoly Lazar, Janos Kiss, Imre Kiricsi, Robert Vajtai, Xavier Aymerich, Laszlo B. Kish, Angel Rubio
2003 Nanotechnology  
A BSTR A C T Characterization of iron containing alumina supported catalysts was performed by TEM, Mossbauer and XPS spectroscopy during formation of multi wall carbon nanotubes from acetylene at 1000 K. TEM images showed that carbon fibers (outer diameter is around 20-40 nm) were generated on Fe/AhCb samples while on the bimetallic Fe,Co/Al203 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/Al20 3
more » ... of Fe,Co/Al20 3 and acetylene at 1000 K. The formation o f the bimetallic alloy was proven by Mossbauer spectroscopy as well.
doi:10.1117/12.501324 fatcat:3lbbb5tq45bkljtinkbc7dhvfy