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

Y. J. Glanville; J. V. Pearce; P. E. Sokol; B. Newalker; S. Komarneni

doi:10.1016/S0301-0104(03)00099-5

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

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

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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 language	English (US)
Pages (from-to)	289-293
Number of pages	5
Journal	Chemical Physics
Volume	292
Issue number	2-3
DOIs	https://doi.org/10.1016/S0301-0104(03)00099-5
State	Published - Aug 1 2003

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/S0301-0104(03)00099-5

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title = "Study of H2 confined in the highly ordered pores of MCM-48",

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.",

author = "Glanville, {Y. J.} and Pearce, {J. V.} and Sokol, {P. E.} and B. Newalker and S. Komarneni",

note = "Funding Information: We gratefully acknowledge the support of the NSF under Grant No. DMR-9970126 and the DOE{\textquoteright}s support of the Intense Pulsed Neutron Source at Argonne National Laboratory.",

year = "2003",

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doi = "10.1016/S0301-0104(03)00099-5",

language = "English (US)",

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pages = "289--293",

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TY - JOUR

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.

AU - Newalker, B.

AU - Komarneni, S.

N1 - Funding Information: We gratefully acknowledge the support of the NSF under Grant No. DMR-9970126 and the DOE’s support of the Intense Pulsed Neutron Source at Argonne National Laboratory.

PY - 2003/8/1

Y1 - 2003/8/1

N2 - 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.

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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U2 - 10.1016/S0301-0104(03)00099-5

DO - 10.1016/S0301-0104(03)00099-5

M3 - Article

AN - SCOPUS:0041766191

SN - 0301-0104

VL - 292

SP - 289

EP - 293

JO - Chemical Physics

JF - Chemical Physics

IS - 2-3

ER -

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

Abstract

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