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Hydrogen

Enhanced Thermal- and Photostability of Trace Pyrazine-Incorporated Hydrogen Boride Nanosheets

Strategic Insights

— 2 min read

Researchers at the School of Materials and Chemical Technology in Tokyo, Japan, have successfully developed a novel hydrogen-rich material with controllable hydrogen-release properties under various stimuli. The scientists, led by Jumpei Takeshita, have created pyrazine-incorporated hydrogen boride (Pyrazine-HB) nanosheets through a simple solution-mixing and drying process. These nanosheets exhibit significantly enhanced thermal stability, with a hydrogen release temperature 200 K higher than that of pure HB, and suppressed hydrogen release under UV and visible light irradiation.

Key Takeaways:

  • The research team synthesized pyrazine-incorporated HB nanosheets (Pyrazine-HB) via a simple solution-mixing and drying process, which resulted in significantly enhanced thermal stability.
  • Pyrazine-HB exhibits a hydrogen release temperature 200 K higher than that of pure HB, indicating improved thermal stability.
  • The incorporation of pyrazine into HB nanosheets also leads to suppressed hydrogen release under UV and visible light irradiation.
  • The Brunauer-Emmett-Teller analysis reveals an increased surface area upon pyrazine incorporation, suggesting intercalation between HB layers.
  • Transmission electron microscopy images show changes in interlayer spacing indicative of molecular intercalation, further supporting the improved stability of Pyrazine-HB.
  • The researchers attributed the improved stability of Pyrazine-HB to expanded interlayer spacing, which prevents interlayer hydrogen recombination.
  • The study presents a facile and effective molecular-level strategy for tuning the thermal stability and photostability of HB nanosheets, advancing their potential for energy-related applications.
  • Funders for this research include Japan Science and Technology Corporation, Japan Society for the Promotion of Science, and Core Research for Evolutional Science and Technology.
  • Shin-Ichi Ito, Osamu Oki, Ryuki Tsuji, Akira Hasegawa, Samuel Jeong, Yoshikazu Ito, Iwao Matsuda, Hayato Tsurugi, Masahiro Miyauchi, and Takahiro Kondo are also authors of this research, along with Jumpei Takeshita and Miwa Hikichi.

Statistics:

  • The hydrogen release temperature of Pyrazine-HB is 200 K higher than that of pure HB.
  • The surface area of Pyrazine-HB is increased by intercalation between HB layers, as determined by Brunauer-Emmett-Teller analysis.
  • The incorporation of pyrazine into HB nanosheets leads to a 2.9 mol% pyrazine content.
  • The study presents a new molecular-level strategy for tuning the thermal stability and photostability of HB nanosheets.

Sources:

  • NewsRx. New Nanosheets Findings from School of Materials and Chemical Technology Outlined (Enhanced Thermal- and Photostability of Trace Pyrazine-Incorporated Hydrogen Boride Nanosheets). Nanotechnology Weekly. November 3, 2025; p 2385.
  • Small. Enhanced Thermal- and Photostability of Trace Pyrazine-Incorporated Hydrogen Boride Nanosheets. (Wiley-Blackwell - www.wiley.com/; Small - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1613-6829)

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