Inelastic Neutron Scattering of H2 Adsorbed on Boron Substituted Single Walled Carbon Nanotubes

Y. Liu, C. M. Brown, J. L. Blackburn, D. A. Neumann, T. Gennett, L. Simpson, P. Parilla, A. C. Dillon, M. J. Heben

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We report inelastic neutron scattering investigations of hydrogen adsorbed on both purified boron substituted (≤1%) single walled carbon nanotube bundles and purified single walled carbon nanotube bundles. Samples of both types were generated by both arc and laser production methods. At H2 coverages ≤3 H2/B, a clear splitting is observed for the H2 rotation transition peak at about 14.7 meV in all arc-produced samples. In contrast, the spectra from laser-produced materials exhibit one broad peak. Further increase in H2 coverage results in adsorption at lower binding energy sites. No distinct signature of an enhanced boron-hydrogen interaction is observed. However, the overall line width of the rotation transition peak from a laser-produced sample is substantially smaller than that from arc-prepared samples. This difference might imply that some features of the H2 rotation transition peak might not be due to the intrinsic features of single wall carbon nanotubes.

Original languageAmerican English
Pages (from-to)368-372
Number of pages5
JournalJournal of Alloys and Compounds
StatePublished - 2007

NREL Publication Number

  • NREL/JA-590-42492


  • Energy storage materials
  • Hydrogen storage materials
  • Nanostructured materials
  • Neutron scattering


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