title: Single-wall carbon nanotube synthesis by CO disproportionation on nickel-incorporated MCM-41.
abstract: 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, H(2) 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.
authors: Department of Chemical Engineering, Yale University, New Haven, CT 06520, USA.
authors: Yuan
authors: Y
authors: Chen
authors: Dragos
authors: D
authors: Ciuparu
authors: Yanhui
authors: Y
authors: Yang
authors: Sangyun
authors: S
authors: Lim
authors: Chuan
authors: C
authors: Wang
authors: Gary L
authors: GL
authors: Haller
authors: Lisa D
authors: LD
authors: Pfefferle