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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
Resource Relation:
Journal Name: Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films; Journal Volume: 33; Journal Issue: 2; Other Information: (c) 2014 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA)
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, E-mail: ich.arakawa@gakushuin.ac.jp, 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, E-mail: ich.arakawa@gakushuin.ac.jp, 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. doi:10.1116/1.4904033.
Arakawa, Ichiro, E-mail: ich.arakawa@gakushuin.ac.jp, Shimizu, Hideyuki, Kawarabuki, Taku, Yamakawa, Koichiro, and Miura, Takashi. Sun . "Application of electron stimulated desorption techniques to measure the isotherm and the mean residence time of hydrogen physisorbed on a metal surface". United States. doi: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, E-mail: ich.arakawa@gakushuin.ac.jp 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},
journal = {Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films},
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}
}