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

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

In situ resistivity (ρ) 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 wt. % 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)
Article number035408
Pages (from-to)354081-354085
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number3
StatePublished - Jan 15 2002

Fingerprint

Carbon Nanotubes
Hydrogen storage
Carbon nanotubes
carbon nanotubes
hydrogen
Physisorption
Thermoelectric power
Single-walled carbon nanotubes (SWCN)
Binding energy
Transport properties
bundles
Hydrogen
plateaus
transport properties
binding energy
plots
Gases
Adsorption
electrical resistivity
adsorption

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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. Physical Review B - Condensed Matter and Materials Physics, 65(3), 354081-354085. [035408].
Sumanasekera, G. U. ; Adu, Kofi W. ; Pradhan, B. K. ; Chen, G. ; Romero, H. E. ; Eklund, P. C. / Thermoelectric study of hydrogen storage in carbon nanotubes. In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 65, No. 3. pp. 354081-354085.
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Sumanasekera, GU, Adu, KW, Pradhan, BK, Chen, G, Romero, HE & Eklund, PC 2002, 'Thermoelectric study of hydrogen storage in carbon nanotubes', Physical Review B - Condensed Matter and Materials Physics, vol. 65, no. 3, 035408, pp. 354081-354085.

Thermoelectric study of hydrogen storage in carbon nanotubes. / Sumanasekera, G. U.; Adu, Kofi W.; Pradhan, B. K.; Chen, G.; Romero, H. E.; Eklund, P. C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 3, 035408, 15.01.2002, p. 354081-354085.

Research output: Contribution to journalArticle

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AU - Sumanasekera, G. U.

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AU - Romero, H. E.

AU - Eklund, P. C.

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AB - In situ resistivity (ρ) 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 wt. % 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.

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Sumanasekera GU, Adu KW, Pradhan BK, Chen G, Romero HE, Eklund PC. Thermoelectric study of hydrogen storage in carbon nanotubes. Physical Review B - Condensed Matter and Materials Physics. 2002 Jan 15;65(3):354081-354085. 035408.