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Photoinduced hydrogen release from hydrogen boride sheets

Author

Listed:
  • Reiya Kawamura

    (Tokyo Institute of Technology)

  • Nguyen Thanh Cuong

    (University of Tsukuba)

  • Takeshi Fujita

    (Kochi University of Technology)

  • Ryota Ishibiki

    (University of Tsukuba)

  • Toru Hirabayashi

    (Tokyo Institute of Technology)

  • Akira Yamaguchi

    (Tokyo Institute of Technology)

  • Iwao Matsuda

    (University of Tokyo)

  • Susumu Okada

    (University of Tsukuba)

  • Takahiro Kondo

    (University of Tsukuba
    Tokyo Institute of Technology)

  • Masahiro Miyauchi

    (Tokyo Institute of Technology)

Abstract

Hydrogen boride nanosheets (HB sheets) are facilely synthesized via ion-exchange treatment on magnesium diboride (MgB2) in an acetonitrile solution. Optical absorption and fluorescence spectra of HB sheets indicate that their bandgap energy is 2.8 eV. According to first-principles calculations, optical absorption seen at 2.8 eV is assigned to the electron transition between the σ-bonding states of B and H orbitals. In addition, density functional theory (DFT) calculations suggest the other allowed transition from the σ-bonding state of B and H orbitals to the antibonding state with the gap of 3.8 eV. Significant gaseous H2 release is found to occur only under photoirradiation, which causes the electron transition from the σ-bonding state to the antibonding state even under mild ambient conditions. The amount of H2 released from the irradiated HB sheets is estimated to be 8 wt%, indicating that the sheets have a high H2-storage capacity compared with previously reported metal H2-storage materials.

Suggested Citation

  • Reiya Kawamura & Nguyen Thanh Cuong & Takeshi Fujita & Ryota Ishibiki & Toru Hirabayashi & Akira Yamaguchi & Iwao Matsuda & Susumu Okada & Takahiro Kondo & Masahiro Miyauchi, 2019. "Photoinduced hydrogen release from hydrogen boride sheets," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12903-1
    DOI: 10.1038/s41467-019-12903-1
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    Cited by:

    1. Xiaoxiao Zeng & Yudan Jing & Saisai Gao & Wencong Zhang & Yang Zhang & Hanwen Liu & Chao Liang & Chenchen Ji & Yi Rao & Jianbo Wu & Bin Wang & Yonggang Yao & Shengchun Yang, 2023. "Hydrogenated borophene enabled synthesis of multielement intermetallic catalysts," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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