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Tuneable mesoporous silica material for hydrogen storage application via nano-confined clathrate hydrate construction. | LitMetric

AI Article Synopsis

  • Ongoing research is focused on safely storing and utilizing hydrogen as a fuel alternative to carbon-based sources, but challenges like high energy costs due to its low density complicate this goal.
  • Clathrates, or gas hydrates, form when hydrogen is trapped in water molecules, providing a potential solution for safely storing hydrogen as they only require water to create these structures.
  • A proposed solution involves using hydrophobic mesoporous silica as a host material, which allows for hydrogen storage at lower pressures and temperatures, showing about a 20% reduction in required pressure for formation compared to traditional methods, with further insights gained from neutron scattering techniques.

Article Abstract

Safe storage and utilisation of hydrogen is an ongoing area of research, showing potential to enable hydrogen becoming an effective fuel, substituting current carbon-based sources. Hydrogen storage is associated with a high energy cost due to its low density and boiling point, which drives a high price. Clathrates (gas hydrates) are water-based (ice-like) structures incorporating small non-polar compounds such as H in cages formed by hydrogen bonded water molecules. Since only water is required to construct the cages, clathrates have been identified as a potential solution for safe storage of hydrogen. In bulk, pure hydrogen clathrate (HO-H) only forms in harsh conditions, but confined in nanospaces the properties of water are altered and hydrogen storage at mild pressure and temperature could become possible. Here, specifically a hydrophobic mesoporous silica is proposed as a host material, providing a suitable nano-confinement for ice-like clathrate hydrate. The hybrid silica material shows an important decrease of the pressure required for clathrate formation (approx. 20%) compared to the pure HO-H system. In-situ inelastic neutron scattering (INS) and neutron diffraction (ND) provided unique insights into the interaction of hydrogen with the complex surface of the hybrid material and demonstrated the stability of nano-confined hydrogen clathrate hydrate.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11461665PMC
http://dx.doi.org/10.1038/s41467-024-52893-3DOI Listing

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