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Thermal field desorption spectroscopy of chemisorbed hydrogen for a single step site

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Ernst,  Norbert
Fritz Haber Institute, Max Planck Society;

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Block,  Jochen H.
Fritz Haber Institute, Max Planck Society;

Ye,  X.
Fritz Haber Institute, Max Planck Society;
Department of Chemistry, The University of British Columbia;

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PhysRevLett.71.891.pdf
(Publisher version), 414KB

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Citation

Ernst, N., Block, J. H., Ye, X., & Kreuzer, H. J. (1993). Thermal field desorption spectroscopy of chemisorbed hydrogen for a single step site. Physical Review Letters, 71(6), 891-894. doi:10.1103/PhysRevLett.71.891.


Cite as: https://hdl.handle.net/21.11116/0000-000A-52EE-E
Abstract
The steady state molecular hydrogen ion yield from a single atomic step site of a [110]-oriented tungsten and of a [100]-oriented rhodium crystal is determined as a function of surface temperature using mass and energy resolved probe hole field ion microscopy. A second order kinetic model is developed to fit the experimental data thus obtaining the hydrogen binding energy. For local fields of about 3 V/Å the data are close to values obtained from thermal desorption spectroscopy. A comparison is made with calculations of the field-adsorption binding energy of atomic hydrogen on a jellium surface based on density functional theory.