Synthesis of carbon nanotubes, nanofibers and encapsulated nanoparticles by decomposition of acetylene on Ge modified Pd catalysts

✍ Scribed by Segura, Rodrigo A. ;Tello, Alejandra ;Häberle, Patricio

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 265 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200675311

✦ Synopsis

Abstract

Different carbon nanostructures were synthesized by decomposition of acetylene over alumina supported palladium–germanium catalysts. The addition of small amounts of Ge to the Pd(1%)/γ‐Al~2~O~3~ catalyst increases the yield of carbon nanotubes among other carbon products, in the decomposition of acetylene. The use of a higher Ge concentration (0.3%) in the catalyst induces the formation of carbon nanofibers. For larger Ge concentrations (0.5%) the bimetallic catalyst particles become encapsulated in a graphitic structure. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)