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Adsorption of hydrogen on porous Vycor glass

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Abstract

Hydrogen adsorption isotherms have been measured at temperatures between 15 K and 20 K for porous Vycor glass. The intermediate adsorption data were analyzed using a modified Brunauer-Emmett-Teller method, which is based on the assumption that two layers are coadsorbed, the first layer being very strongly attached. Our results indicate that, relative to the adsorption energy of the free surface of the bulk liquid, the adsorption energy of the second layer is approximately 60 K, much smaller than the adsorption energy of the first layer but still significant at the low temperature of the experiments. Our results are compared to those for adsorption of4He on Vycor.

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Author notes

  1. T. E. Huber

    Present address: Department of Physics, Harvard University, 02138, Cambridge, MA

  2. C. A. Huber

    Present address: Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, 02139, Cambridge, MA

Authors and Affiliations

  1. Department of Physics, University of Puerto Rico, Rio Piedras, Puerto Rico

    T. E. Huber & C. A. Huber

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  1. T. E. Huber
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  2. C. A. Huber
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Huber, T.E., Huber, C.A. Adsorption of hydrogen on porous Vycor glass. J Low Temp Phys 80, 315–323 (1990). https://doi.org/10.1007/BF00683637

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  • DOI: https://doi.org/10.1007/BF00683637

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