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

1 Citation (Scopus)

Abstract

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

Original languageEnglish (US)
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number3
DOIs
StatePublished - Jan 1 2002

Fingerprint

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

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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. 1-5.
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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, 01.01.2002, p. 1-5.

Research output: Contribution to journalArticle

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AU - Sumanasekera, G. U.

AU - Adu, Kofi W.

AU - Pradhan, B. K.

AU - Chen, G.

AU - Romero, H. E.

AU - Eklund, P. C.

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

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