Neutron scattering study of H2 adsorption in single-walled carbon nanotubes

Y. Ren; D. L. Price

doi:10.1063/1.1421639

Neutron scattering study of H₂ adsorption in single-walled carbon nanotubes

Y. Ren
, D. L. Price

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

63 Citations (Scopus)

Abstract

H₂ adsorption in single-walled carbon nanotubes (SWCNTs) has been studied with quasielastic and inelastic neutron scattering. At 80 K, under a H₂ pressure of 110 atm, H₂ molecules gradually condense in the SWCNT sample. After pumping out at 25 K and 20 mTorr, the remaining H₂ molecules show a quantum rotational transition at 14.5±0.1 meV, with a peak width that increases linearly with increasing temperature from 4.2 to 35 K. The H₂ molecules remain in the sample up to 65 K and then start to desorb with increasing temperature. A broad inelastic scattering spectrum from the adsorbed hydrogen is also observed. The time scale of the dynamics is longer than 15 ps even at 200 K. Our results imply that hydrogen molecules are physisorbed in the interstitial tunnels of the SWCNT bundles. © 2001 American Institute of Physics.

Original language	English
Pages (from-to)	3684-3686
Journal	Applied Physics Letters
Volume	79
Issue number	22
DOIs	https://doi.org/10.1063/1.1421639
Publication status	Published - 26 Nov 2001
Externally published	Yes

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title = "Neutron scattering study of H2 adsorption in single-walled carbon nanotubes",

abstract = "H2 adsorption in single-walled carbon nanotubes (SWCNTs) has been studied with quasielastic and inelastic neutron scattering. At 80 K, under a H2 pressure of 110 atm, H2 molecules gradually condense in the SWCNT sample. After pumping out at 25 K and 20 mTorr, the remaining H2 molecules show a quantum rotational transition at 14.5±0.1 meV, with a peak width that increases linearly with increasing temperature from 4.2 to 35 K. The H2 molecules remain in the sample up to 65 K and then start to desorb with increasing temperature. A broad inelastic scattering spectrum from the adsorbed hydrogen is also observed. The time scale of the dynamics is longer than 15 ps even at 200 K. Our results imply that hydrogen molecules are physisorbed in the interstitial tunnels of the SWCNT bundles. {\textcopyright} 2001 American Institute of Physics.",

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T1 - Neutron scattering study of H2 adsorption in single-walled carbon nanotubes

AU - Ren, Y.

AU - Price, D. L.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2001/11/26

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N2 - H2 adsorption in single-walled carbon nanotubes (SWCNTs) has been studied with quasielastic and inelastic neutron scattering. At 80 K, under a H2 pressure of 110 atm, H2 molecules gradually condense in the SWCNT sample. After pumping out at 25 K and 20 mTorr, the remaining H2 molecules show a quantum rotational transition at 14.5±0.1 meV, with a peak width that increases linearly with increasing temperature from 4.2 to 35 K. The H2 molecules remain in the sample up to 65 K and then start to desorb with increasing temperature. A broad inelastic scattering spectrum from the adsorbed hydrogen is also observed. The time scale of the dynamics is longer than 15 ps even at 200 K. Our results imply that hydrogen molecules are physisorbed in the interstitial tunnels of the SWCNT bundles. © 2001 American Institute of Physics.

AB - H2 adsorption in single-walled carbon nanotubes (SWCNTs) has been studied with quasielastic and inelastic neutron scattering. At 80 K, under a H2 pressure of 110 atm, H2 molecules gradually condense in the SWCNT sample. After pumping out at 25 K and 20 mTorr, the remaining H2 molecules show a quantum rotational transition at 14.5±0.1 meV, with a peak width that increases linearly with increasing temperature from 4.2 to 35 K. The H2 molecules remain in the sample up to 65 K and then start to desorb with increasing temperature. A broad inelastic scattering spectrum from the adsorbed hydrogen is also observed. The time scale of the dynamics is longer than 15 ps even at 200 K. Our results imply that hydrogen molecules are physisorbed in the interstitial tunnels of the SWCNT bundles. © 2001 American Institute of Physics.

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M3 - RGC 21 - Publication in refereed journal

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JO - Applied Physics Letters

JF - Applied Physics Letters

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