Study of H2 confined in the highly ordered pores of MCM-48

Y. J. Glanville, J. V. Pearce, P. E. Sokol, B. Newalker, Sridhar Komarneni

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We present quasi-elastic neutron scattering measurements of the diffusion of H2 adsorbed in porous MCM-48, a silica glass, with an ordered pore network. Quasi-elastic scattering of hydrogen adsorbed within the pore network was used to monitor the liquid-solid transitions of the absorbed fluid. Unlike other porous media of similar pore size, where supercooling of the liquid-solid transition by 3-4 K was observed, no suppression of the transition was observed for MCM-48. Furthermore, no hysteresis between freezing and melting is observed, as in other porous media. The diffusion constant for the confined liquid has been extracted from the measurements, and the hydrogen adsorbed in the MCM-48 has a slightly higher diffusion constant than bulk liquid H2.

Original languageEnglish (US)
Pages (from-to)289-293
Number of pages5
JournalChemical Physics
Volume292
Issue number2-3
DOIs
StatePublished - Aug 1 2003

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Multicarrier modulation
porosity
Elastic scattering
Liquids
liquids
Porous materials
Hydrogen
elastic scattering
Supercooling
silica glass
supercooling
hydrogen
Fused silica
Neutron scattering
Freezing
freezing
Pore size
Hysteresis
Melting
neutron scattering

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Glanville, Y. J., Pearce, J. V., Sokol, P. E., Newalker, B., & Komarneni, S. (2003). Study of H2 confined in the highly ordered pores of MCM-48. Chemical Physics, 292(2-3), 289-293. https://doi.org/10.1016/S0301-0104(03)00099-5
Glanville, Y. J. ; Pearce, J. V. ; Sokol, P. E. ; Newalker, B. ; Komarneni, Sridhar. / Study of H2 confined in the highly ordered pores of MCM-48. In: Chemical Physics. 2003 ; Vol. 292, No. 2-3. pp. 289-293.
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Glanville, YJ, Pearce, JV, Sokol, PE, Newalker, B & Komarneni, S 2003, 'Study of H2 confined in the highly ordered pores of MCM-48', Chemical Physics, vol. 292, no. 2-3, pp. 289-293. https://doi.org/10.1016/S0301-0104(03)00099-5

Study of H2 confined in the highly ordered pores of MCM-48. / Glanville, Y. J.; Pearce, J. V.; Sokol, P. E.; Newalker, B.; Komarneni, Sridhar.

In: Chemical Physics, Vol. 292, No. 2-3, 01.08.2003, p. 289-293.

Research output: Contribution to journalArticle

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T1 - Study of H2 confined in the highly ordered pores of MCM-48

AU - Glanville, Y. J.

AU - Pearce, J. V.

AU - Sokol, P. E.

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AU - Komarneni, Sridhar

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AB - We present quasi-elastic neutron scattering measurements of the diffusion of H2 adsorbed in porous MCM-48, a silica glass, with an ordered pore network. Quasi-elastic scattering of hydrogen adsorbed within the pore network was used to monitor the liquid-solid transitions of the absorbed fluid. Unlike other porous media of similar pore size, where supercooling of the liquid-solid transition by 3-4 K was observed, no suppression of the transition was observed for MCM-48. Furthermore, no hysteresis between freezing and melting is observed, as in other porous media. The diffusion constant for the confined liquid has been extracted from the measurements, and the hydrogen adsorbed in the MCM-48 has a slightly higher diffusion constant than bulk liquid H2.

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