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Single-wall carbon nanotube synthesis by CO disproportionation on nickel-incorporated MCM-41

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Y. Chen, D. Ciuparu, Y. Yang, S. Lim, C. Wang, G. L Haller, L. D Pfefferle

Editorial: Nanotechnology, 16(7), p.S476-S483, 2005.

Rezumat:

Both Ni- and Co-MCM-41 may be used for the synthesis of single-wall carbon nanotubes (SWNT). We present a comparative investigation that demonstrates that smaller diameter SWNT with a narrower distribution of diameters are produced using Co-MCM-41. Temperature-programmed reduction and x-ray absorption spectroscopy were used to measure the reducibility and metal cluster growth of Ni- and Co-MCM-41 in He, H2 and under CO disproportionation reaction. The differences between these two catalysts can be attributed to a greater reducibility of and a greater CO affinity for Ni relative to Co.

Cuvinte cheie: Ni-MCM-41, carbon nanotubes, CO disproportionation, X-ray Absorption Spectroscopy

URL: http://stacks.iop.org/0957-4484/16/S476