Large cryogenic storage of hydrogen in carbon nanotubes at low pressures

B. K. Pradhan, A. Harutyunyan, D. Stojkovic, P. Zhang, Milton Walter Cole, Vincent Henry Crespi, H. Goto, J. Fujiwara, P. C. Eklund

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We report (6 wt %) storage of H2 at T=77 K in processed bundles of single-walled carbon nanotubes at P=2 atmospheres. The hydrogen storage isotherms are completely reversible. D2 isotherms confirm this anomalous low-pressure adsorption and further reveal the effects of quantum mechanical zero point motion. We propose that our post-synthesis treatment of the sample not only improves access for hydrogen to the central pores within individual nanotubes, but also may create a roughened tube surface with an enhanced binding energy for hydrogen. Such an enhancement is needed to understand the strong adsorption at low pressure. We obtain an experimental isosteric heat qst = 125 ± 5 meV for processed SWNT materials.

Original languageEnglish (US)
Pages (from-to)331-336
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume706
StatePublished - Jan 1 2002

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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