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The Interaction of Hydrogen with the van der Waals Crystal ?-InSe


James Felton

Elena Blundo

Joseph Glover

Zakhar D Kovalyuk

The Sir Harry and Lady Djanogly Chair in Sustainable Energy

Antonio Polimeni


The emergence of the hydrogen economy requires development in the storage, generation and sensing of hydrogen. The indium selenide (?-InSe) van der Waals (vdW) crystal shows promise for technologies in all three of these areas. For these applications to be realised, the fundamental interactions of InSe with hydrogen must be understood. Here, we present a comprehensive experimental and theoretical study on the interaction of ?-InSe with hydrogen. It is shown that hydrogenation of ?-InSe by a Kaufman ion source results in a marked quenching of the room temperature photoluminescence signal and a modification of the vibrational modes of ?-InSe, which are modelled by density functional theory simulations. Our experimental and theoretical studies indicate that hydrogen is incorporated into the crystal preferentially in its atomic form. This behaviour is qualitatively different from that observed in other vdW crystals, such as transition metal dichalcogenides, where molecular hydrogen is intercalated in the vdW gaps of the crystal, leading to the formation of "bubbles" for hydrogen storage.


Felton, J., Blundo, E., Ling, S., Glover, J., Kudrynskyi, Z. R., Makarovsky, O., …Patané, A. (2020). The Interaction of Hydrogen with the van der Waals Crystal γ-InSe. Molecules, 25(11), Article 2526.

Journal Article Type Article
Acceptance Date May 23, 2020
Online Publication Date May 28, 2020
Publication Date May 28, 2020
Deposit Date May 28, 2020
Publicly Available Date May 29, 2020
Journal Molecules
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 25
Issue 11
Article Number 2526
Keywords indium selenide; intercalation; Kaufman ion source; Raman; photoluminescence; van der Waals crystals; hydrogen
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