Hydrogen physisorption on carbon foams upon inclusion of many-body and quantum delocalization effects

A. Martínez-Mesa, L. Zhechkov, S. N. Yurchenko, T. Heine, G. Seifert, J. Rubayo-Soneira

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Abstract

We investigate the effect of the structural characteristics of idealized nanoporous environments on the adsorption of molecular hydrogen. The storage capacities of the (n,n) armchair and zigzag carbon foams (n = 2-5) are evaluated in a broad range of thermodynamic conditions. Our calculations are performed within an extension of the density functional theory of liquids to quantum fluids at finite temperature (QLDFT) of particles obeying Bose-Einstein statistics. The exchange-correlation (excess) functional is derived from the empirical equation of state of the homogeneous system. Graphitic foams are found to exhibit hydrogen uptakes similar to other carbonaceous materials, the largest gravimetric capacity being that of the (5,5) zigzag structure (∼4.5% at T = 77 K). The storage properties show a rather smooth dependence on the size of the pore. The effects of the H 2-H 2 interactions on adsorption isotherms are evaluated via the comparison of QLDFT results with calculations based on the ideal gas approximation.

Original languageEnglish
Pages (from-to)19543-19553
Number of pages11
JournalJournal of Physical Chemistry C
Volume116
Issue number36
DOIs
Publication statusPublished - 2012 Sep 13

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Martínez-Mesa, A., Zhechkov, L., Yurchenko, S. N., Heine, T., Seifert, G., & Rubayo-Soneira, J. (2012). Hydrogen physisorption on carbon foams upon inclusion of many-body and quantum delocalization effects. Journal of Physical Chemistry C, 116(36), 19543-19553. https://doi.org/10.1021/jp305462w