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Nanopores of carbon nanotubes as practical hydrogen storage media

Han, Sang Soo and Kim, Hyun Seok and Han, Kyu Sung and Lee, Jai Young and Lee, Hyuck Mo and Kang, Jeung Ku and Woo, Seong Ihl and van Duin, Adri C. T. and Goddard, William A., III (2005) Nanopores of carbon nanotubes as practical hydrogen storage media. Applied Physics Letters, 87 (21). Art. no. 213113. ISSN 0003-6951.

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We report on hydrogen desorption mechanisms in the nanopores of multiwalled carbon nanotubes (MWCNTs). The as-grown MWCNTs show continuous walls that do not provide sites for hydrogen storage under ambient conditions. However, after treating the nanotubes with oxygen plasma to create nanopores in the MWCNTs, we observed the appearance of a new hydrogen desorption peak in the 300–350 K range. Furthermore, the calculations of density functional theory and molecular dynamics simulations confirmed that this peak could be attributed to the hydrogen that is physically adsorbed inside nanopores whose diameter is approximately 1 nm. Thus, we demonstrated that 1 nm nanopores in MWCNTs offer a promising route to hydrogen storage media for onboard practical applications.

Item Type:Article
Additional Information:©2005 American Institute of Physics (Received 2 June 2005; accepted 12 October 2005; published online 16 November 2005) This research was supported by the research program of KOSEF (Grant No. R012005000103330)and the Center for Ultramicrochemical Process Systems (CUPS) sponsored by KOSEF (2005).
Subject Keywords:nanoporous materials; carbon nanotubes; hydrogen storage; desorption; plasma materials processing; density functional theory; molecular dynamics method
Record Number:CaltechAUTHORS:HANapl05
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ID Code:1353
Deposited By: Archive Administrator
Deposited On:11 Jan 2006
Last Modified:26 Dec 2012 08:43

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