Inelastic neutron scattering of H2 adsorbed on boron substituted single walled carbon nanotubes
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.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1344971
- Report Number(s):
- NREL/JA-590-42492
- Journal Information:
- Journal of Alloys and Compounds, Vol. 446-447, Issue C; ISSN 0925-8388
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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