Influence of catalyst metal particles on the hydrogen sorption of single-walled carbon nanotube materials

Costa, Pmfj; Coleman, K.S.; Green, M.L.H.

Abstract

The hydrogen sorption capacity of arc-synthesized single-walled carbon nanotubes (SWNTs) was studied using a specially built high-pressure rig coupled to a Toepler pump capable of directly measuring the desorbed volumes of gas. The samples studied were prepared using the arc-evaporation method and were as-produced SWNT material formed at the cathode (collar), as-produced SWNTs deposited in the soot and a purified sample of SWNTs. The three samples had similar diameter ranges, the major difference between them being the concentration of remaining metal particles from the Ni/Y/C catalyst used in the arc-synthesis. The effect of the presence of these residual catalyst metal particles has been analysed and seen to strongly influence the hydrogen storage capacity of the samples.

Citation

Costa, P., Coleman, K., & Green, M. (2005). Influence of catalyst metal particles on the hydrogen sorption of single-walled carbon nanotube materials. Nanotechnology, 16(4), 512-517

• Journal Article Type: Article
• Publication Date: 2005-04
• Journal: Nanotechnology
• Print ISSN: 0957-4484
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 16
• Issue: 4
• Pages: 512-517
• Keywords: RAMAN-SCATTERING; HYDROGEN STORAGE; ADSORPTION; CARBON NANOTUBES