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Title: Application of electron stimulated desorption techniques to measure the isotherm and the mean residence time of hydrogen physisorbed on a metal surface

Abstract

Electron stimulated desorption techniques were applied to probe the density of H{sub 2} physisorbed on a cold surface. The adsorption isotherm of H{sub 2} on a copper surface was measured in the equilibrium pressure range between 10{sup −9} and 10{sup −4} Pa at surface temperatures of 6.5 and 4.2 K. The mean residence times of H{sub 2} on copper were obtained from the observation of the time development of the surface density in a transitional state approaching equilibrium, and are 50–500 s for the coverage between 1 and 0.18 at 4.2 K of the substrate temperature. The adsorption energies of 1.18–1.27 kJ/mol, and the condensation coefficient of 0.074–0.018 were also deduced.

Authors:
; ; ; ;  [1]
  1. Department of Physics, Gakushuin University, 1-5-1, Mejiro, Toshima-ku, Tokyo 171-8588 (Japan)
Publication Date:
OSTI Identifier:
22392165
Resource Type:
Journal Article
Journal Name:
Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films
Additional Journal Information:
Journal Volume: 33; Journal Issue: 2; Other Information: (c) 2014 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0734-2101
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 42 ENGINEERING; ADSORPTION; ADSORPTION ISOTHERMS; COPPER; DENSITY; DESORPTION; ELECTRONS; EQUILIBRIUM; HYDROGEN; PRESSURE RANGE NANO PA; SUBSTRATES; SURFACES

Citation Formats

Arakawa, Ichiro, Shimizu, Hideyuki, Kawarabuki, Taku, Yamakawa, Koichiro, and Miura, Takashi. Application of electron stimulated desorption techniques to measure the isotherm and the mean residence time of hydrogen physisorbed on a metal surface. United States: N. p., 2015. Web. doi:10.1116/1.4904033.
Arakawa, Ichiro, Shimizu, Hideyuki, Kawarabuki, Taku, Yamakawa, Koichiro, & Miura, Takashi. Application of electron stimulated desorption techniques to measure the isotherm and the mean residence time of hydrogen physisorbed on a metal surface. United States. https://doi.org/10.1116/1.4904033
Arakawa, Ichiro, Shimizu, Hideyuki, Kawarabuki, Taku, Yamakawa, Koichiro, and Miura, Takashi. 2015. "Application of electron stimulated desorption techniques to measure the isotherm and the mean residence time of hydrogen physisorbed on a metal surface". United States. https://doi.org/10.1116/1.4904033.
@article{osti_22392165,
title = {Application of electron stimulated desorption techniques to measure the isotherm and the mean residence time of hydrogen physisorbed on a metal surface},
author = {Arakawa, Ichiro and Shimizu, Hideyuki and Kawarabuki, Taku and Yamakawa, Koichiro and Miura, Takashi},
abstractNote = {Electron stimulated desorption techniques were applied to probe the density of H{sub 2} physisorbed on a cold surface. The adsorption isotherm of H{sub 2} on a copper surface was measured in the equilibrium pressure range between 10{sup −9} and 10{sup −4} Pa at surface temperatures of 6.5 and 4.2 K. The mean residence times of H{sub 2} on copper were obtained from the observation of the time development of the surface density in a transitional state approaching equilibrium, and are 50–500 s for the coverage between 1 and 0.18 at 4.2 K of the substrate temperature. The adsorption energies of 1.18–1.27 kJ/mol, and the condensation coefficient of 0.074–0.018 were also deduced.},
doi = {10.1116/1.4904033},
url = {https://www.osti.gov/biblio/22392165}, journal = {Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films},
issn = {0734-2101},
number = 2,
volume = 33,
place = {United States},
year = {Sun Mar 15 00:00:00 EDT 2015},
month = {Sun Mar 15 00:00:00 EDT 2015}
}