Direct observation of molecular hydrogen binding to magnesium oxide (1 0 0) surfaces

J. Z. Larese; Lillian Frazier; Mark A. Adams; Thomas Arnold; Robert J. Hinde; Anibal Ramirez-Cuesta

doi:10.1016/j.physb.2006.05.344

Direct observation of molecular hydrogen binding to magnesium oxide (1 0 0) surfaces

J. Z. Larese, Lillian Frazier, Mark A. Adams, Thomas Arnold, Robert J. Hinde, Anibal Ramirez-Cuesta

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Inelastic neutron scattering (INS) studies of the dynamical response of H₂ films adsorbed on MgO (1 0 0) surface are compared to and correlated with structural information from neutron diffraction measurements of equivalent D₂ films. At low coverage, a prominent peak, believed to be the para-ortho transition (usually observed at 14.7 meV in bulk H₂) is observed at ∼ 11.2 meV. For film thicknesses between 0.8 and ∼ 3 layers this peak becomes asymmetric with additional scattering on the high-energy transfer side of the peak. As molecules are added to the third layer we observe the concomitant growth of a peak at 14.7 meV.

Original language	English
Pages (from-to)	144-146
Number of pages	3
Journal	Physica B: Physics of Condensed Matter
Volume	385-386 I
DOIs	https://doi.org/10.1016/j.physb.2006.05.344
State	Published - Nov 27 2006
Externally published	Yes

Funding

The authors acknowledge the help of M. Telling, R. Ibberson, S. Parker, T. Hansen, T. Free and the ISIS user support group. This work was supported by the Division of Materials Sciences, Office of Basic Energy Sciences, U.S.DOE, under contract No. DE-AC05-00OR22725 with Oak Ridge National Laboratory, managed and operated by UT-Battelle, LLC, the National Science Foundation under grant DMR-0412231 and start up funds from the University of Tennessee. J.Z.L. acknowledges additional support from ISIS and BP.

Funders	Funder number
Division of Materials Sciences
ISIS
National Science Foundation	DMR-0412231
BP
Basic Energy Sciences	DE-AC05-00OR22725
Oak Ridge National Laboratory
University of Tennessee

Keywords

Adsorption isotherm
Hydrogen
Inelastic neutron scattering
Magnesium oxide
Neutron diffraction

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.physb.2006.05.344

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title = "Direct observation of molecular hydrogen binding to magnesium oxide (1 0 0) surfaces",

abstract = "Inelastic neutron scattering (INS) studies of the dynamical response of H2 films adsorbed on MgO (1 0 0) surface are compared to and correlated with structural information from neutron diffraction measurements of equivalent D2 films. At low coverage, a prominent peak, believed to be the para-ortho transition (usually observed at 14.7 meV in bulk H2) is observed at ∼ 11.2 meV. For film thicknesses between 0.8 and ∼ 3 layers this peak becomes asymmetric with additional scattering on the high-energy transfer side of the peak. As molecules are added to the third layer we observe the concomitant growth of a peak at 14.7 meV.",

keywords = "Adsorption isotherm, Hydrogen, Inelastic neutron scattering, Magnesium oxide, Neutron diffraction",

author = "Larese, {J. Z.} and Lillian Frazier and Adams, {Mark A.} and Thomas Arnold and Hinde, {Robert J.} and Anibal Ramirez-Cuesta",

year = "2006",

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doi = "10.1016/j.physb.2006.05.344",

language = "English",

volume = "385-386 I",

pages = "144--146",

journal = "Physica B: Physics of Condensed Matter",

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T1 - Direct observation of molecular hydrogen binding to magnesium oxide (1 0 0) surfaces

AU - Larese, J. Z.

AU - Frazier, Lillian

AU - Adams, Mark A.

AU - Arnold, Thomas

AU - Hinde, Robert J.

AU - Ramirez-Cuesta, Anibal

PY - 2006/11/27

Y1 - 2006/11/27

N2 - Inelastic neutron scattering (INS) studies of the dynamical response of H2 films adsorbed on MgO (1 0 0) surface are compared to and correlated with structural information from neutron diffraction measurements of equivalent D2 films. At low coverage, a prominent peak, believed to be the para-ortho transition (usually observed at 14.7 meV in bulk H2) is observed at ∼ 11.2 meV. For film thicknesses between 0.8 and ∼ 3 layers this peak becomes asymmetric with additional scattering on the high-energy transfer side of the peak. As molecules are added to the third layer we observe the concomitant growth of a peak at 14.7 meV.

AB - Inelastic neutron scattering (INS) studies of the dynamical response of H2 films adsorbed on MgO (1 0 0) surface are compared to and correlated with structural information from neutron diffraction measurements of equivalent D2 films. At low coverage, a prominent peak, believed to be the para-ortho transition (usually observed at 14.7 meV in bulk H2) is observed at ∼ 11.2 meV. For film thicknesses between 0.8 and ∼ 3 layers this peak becomes asymmetric with additional scattering on the high-energy transfer side of the peak. As molecules are added to the third layer we observe the concomitant growth of a peak at 14.7 meV.

KW - Adsorption isotherm

KW - Hydrogen

KW - Inelastic neutron scattering

KW - Magnesium oxide

KW - Neutron diffraction

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DO - 10.1016/j.physb.2006.05.344

M3 - Article

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VL - 385-386 I

SP - 144

EP - 146

JO - Physica B: Physics of Condensed Matter

JF - Physica B: Physics of Condensed Matter

ER -

Direct observation of molecular hydrogen binding to magnesium oxide (1 0 0) surfaces

Abstract

Funding

Keywords

UN SDGs

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