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Hydrogen boride (HB) sheets are two-dimensional materials and polymorphs of hydrogenated borophene (borophane) composed of boron and hydrogen in a 1:1 stoichiometric ratio. Freestanding HB sheets can be synthesized via ion exchange reactions between the protons and magnesium cations in magnesium diboride. Several unexpected properties of the HB sheets have been reported. Here, the recent progress in HB sheets is reviewed.
Takahiro Kondo (2023) studied this question.