Hydrogen Confinement in Hexagonal Boron Nitride Bubbles Using UV Laser Illumination - IRL2958-GT-CNRS
Article Dans Une Revue Small Année : 2024

Hydrogen Confinement in Hexagonal Boron Nitride Bubbles Using UV Laser Illumination

Résumé

Hexagonal boron nitride (h-BN) bubbles are of significant interest to micro-scale hydrogen storage thanks to their ability to confine hydrogen gas molecules. Previous reports of h-BN bubble creation from grown h-BN films require electron beams under vacuum, making integrating with other experimental setups for hydrogen production impractical. Therefore, in this study, the formation of h-BN bubbles is demonstrated in a 20 nm h-BN film grown on a sapphire substrate with a 213 nm UV laser beam. Using atomic force microscopy, it is shown that longer illumination time induces larger h-BN bubbles up to 20 μm with higher density. It is also demonstrated that h-BN bubbles do not collapse for more than 6 months after their creation. The internal pressure and gravimetric storage capacity of h-BN bubbles are reported. A maximum internal pressure of 41 MPa and a gravimetric storage capacity of 6% are obtained. These findings show that h-BN bubbles can be a promising system for long-term hydrogen storage.
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Dates et versions

hal-04739820 , version 2 (16-10-2024)
hal-04739820 , version 1 (29-10-2024)

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Fatima Z Tijent, Montassar B Bouzourâa, Vishnu Ottapilakkal, Andre Perepeliuc, Rajat Gujrati, et al.. Hydrogen Confinement in Hexagonal Boron Nitride Bubbles Using UV Laser Illumination. Small, 2024, pp.2406794. ⟨10.1002/smll.202406794⟩. ⟨hal-04739820v2⟩
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