Formation of a super-dense hydrogen monolayer on mesoporous silica

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Rafael Balderas-Xicohténcatl - , Max-Planck-Institut für Intelligente Systeme, Oak Ridge National Laboratory (Autor:in)
  • Hung Hsuan Lin - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Christian Lurz - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Luke Daemen - , Oak Ridge National Laboratory (Autor:in)
  • Yongqiang Cheng - , Oak Ridge National Laboratory (Autor:in)
  • Katie Cychosz Struckhoff - , Anton Paar GmbH (Autor:in)
  • Remy Guillet-Nicolas - , Ecole Nationale Superieure d'Ingenieurs de Caen (Autor:in)
  • Gisela Schütz - , Max-Planck-Institut für Intelligente Systeme (Autor:in)
  • Thomas Heine - , Professur für Theoretische Chemie, Helmholtz-Zentrum Dresden-Rossendorf, Yonsei University (Autor:in)
  • Anibal J. Ramirez-Cuesta - , Oak Ridge National Laboratory (Autor:in)
  • Matthias Thommes - , Friedrich-Alexander-Universität Erlangen-Nürnberg (Autor:in)
  • Michael Hirscher - , Max-Planck-Institut für Intelligente Systeme (Autor:in)

Abstract

Adsorption on various adsorbents of hydrogen and helium at temperatures close to their boiling points shows, in some cases, unusually high monolayer capacities. The microscopic nature of these adsorbate phases at low temperatures has, however, remained challenging to characterize. Here, using high-resolution cryo-adsorption studies together with characterization by inelastic neutron scattering vibration spectroscopy, we show that, near its boiling point (~20 K), H2 adsorbed on a well-ordered mesoporous silica forms a two-dimensional monolayer with a density more than twice that of bulk-solid H2, rather than a bilayer. Theoretical studies, based on thorough first-principles calculations, rationalize the formation of such a super-dense phase. The strong compression of the hydrogen surface layer is due to the excess of surface–hydrogen attraction over intermolecular hydrogen repulsion. Use of this super-dense hydrogen monolayer on an adsorbent might be a feasible option for the storage of hydrogen near its boiling point, compared with adsorption at 77 K.

Details

OriginalspracheEnglisch
Seiten (von - bis)1319-1324
Seitenumfang6
FachzeitschriftNature chemistry
Jahrgang14
Ausgabenummer11
PublikationsstatusVeröffentlicht - Nov. 2022
Peer-Review-StatusJa

Externe IDs

PubMed 36038772