Advancements in Freestanding Hydrogen Boride Sheets: Unraveling the Novel Properties of Borophane Polymorphs

Kondo, Takahiro

doi:10.1246/cl.230210

Cited by 8 publications

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“…Hydrogen boride (HB) consists of lighter elements, hydrogen and boron, compared with carbon in graphene. 20–23 It was reported that HB can be synthesized through cation exchange from MgB 2 and it was revealed by several spectroscopic experiments that HB has an unique quasi-two-dimensional structure (Fig. S1, ESI†).…”

Section: Introductionmentioning

confidence: 99%

Lithium-ion battery electrode properties of hydrogen boride

Akiyama,

Ukai,

Ishii

et al. 2024

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 99%

Lithium-ion battery electrode properties of hydrogen boride

Akiyama,

Ukai,

Ishii

et al. 2024

Phys. Chem. Chem. Phys.

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Visible‐Light‐Induced Hydrogen Generation from Mixtures of Hydrogen Boride Nanosheets and Phenanthroline Molecules

Takeshita,

Tsurugi,

Mauliana

et al. 2024

Advanced Science

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Hydrogen boride (HB) nanosheets are recognized as a safe and lightweight hydrogen carrier, yet their hydrogen (H2) generation technique has been limited. In the present study, nitrogen‐containing organic heterocycles are mixed with HB nanosheets in acetonitrile solution for visible‐light‐driven H2 generation. After exploring various nitrogen‐containing heterocycles, the mixture of 1,10‐phenanthroline molecules (Phens) and HB nanosheets exhibited significant H2 generation even under visible light irradiation. The quantum efficiency for H2 generation of the mixture of HB nanosheets and Phens is 0.6%. Based on spectroscopic and electrochemical analyses and density functional theory (DFT) calculations, it is determined that radical species generated from Phens with electrons and protons donated by HB nanosheets are responsive to visible light for H2 generation. The HB nanosheets/Phens mixture presented in this study can generate H2 using renewable energy sources such as sunlight without the need for complex electrochemical systems or heating mechanisms and is expected to serve as a lightweight hydrogen storage/release system.

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Electrolytic Hydrogen Release from Hydrogen Boride Sheets

Kawamura,

Yamaguchi,

Miyazaki

et al. 2024

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Solid‐state hydrogen storage materials are safe and lightweight hydrogen carriers. Among the various solid‐state hydrogen carriers, hydrogen boride (HB) sheets possess a high gravimetric hydrogen capacity (8.5 wt%). However, heating at high temperatures and/or strong ultraviolet illumination is required to release hydrogen (H2) from HB sheets. In this study, the electrochemical H2 release from HB sheets using a dispersion system in an organic solvent without other proton sources is investigated. H2 molecules are released from the HB sheets under the application of a cathodic potential. The Faradaic efficiency for H2 release from HB sheets reached >90%, and the onset potential for H2 release is −0.445 V versus Ag/Ag+, which is more positive than those from other proton sources, such as water or formic acid, under the same electrochemical conditions. The total electrochemically released H2 in a long‐time experiment reached ≈100% of the hydrogen capacity of HB sheets. The H2 release from HB sheets is driven by a small bias; thus, they can be applied as safe and lightweight hydrogen carriers with economical hydrogen release properties.

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Advancements in Freestanding Hydrogen Boride Sheets: Unraveling the Novel Properties of Borophane Polymorphs

Cited by 8 publications

References 100 publications

Lithium-ion battery electrode properties of hydrogen boride

Lithium-ion battery electrode properties of hydrogen boride

Visible‐Light‐Induced Hydrogen Generation from Mixtures of Hydrogen Boride Nanosheets and Phenanthroline Molecules

Electrolytic Hydrogen Release from Hydrogen Boride Sheets

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