Thermoelectric study of hydrogen storage in carbon nanotubes

G. U. Sumanasekera, Kofi W. Adu, B. K. Pradhan, G. Chen, H. E. Romero, P. C. Eklund

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In situ resistivity and thermoelectric power (S) have been used to study the nature of the adsorption of hydrogen in bundles of single-walled carbon nanotubes for H2 pressure P <1 atm and temperatures 77 K <T<500 K. Isothermal plots of S vs. Δρ/ρ0 are found to exhibit linear behavior as a function of gas coverage, consistent with a physisorption process. Studies of S, ρ at T = 500 K as a function of pressure exhibit a plateau at a pressure P∼40 Torr, the same pressure where the H % measurements suggest the highest binding energy sites are being saturated. The effects of H2 exposure at 500 K on the thermoelectric transport properties are fully reversible.

Original languageEnglish (US)
Pages (from-to)337-342
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
StatePublished - 2002

All Science Journal Classification (ASJC) codes

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

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    Sumanasekera, G. U., Adu, K. W., Pradhan, B. K., Chen, G., Romero, H. E., & Eklund, P. C. (2002). Thermoelectric study of hydrogen storage in carbon nanotubes. Materials Research Society Symposium - Proceedings, 706, 337-342.