[3B01-11] Low-dimensional Material / Nanostructure / Nanomaterial (LD/NS/NM))

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[3B01] Enhanced thermostability and photostability of trace pyrazine incorporated hydrogen boride nanosheets

*Miwa Hikichi¹, Jumpei Takeshita², Junyan Han¹, Shin-ichi Ito¹, Osamu Oki^1,3, Ryuki Tsuji^1,3, Akira Hasegawa³, Samuel Jeong⁴, Yoshikazu Ito^3,4, Iwao Matsuda⁵, Hayato Tsurugi⁶, Masahiro Miyauchi^2,3, Takahiro Kondo^1,3,7 (1. Department of Materials Sciences, Institute of Pure and Applied Sciences, University of Tsukuba (Japan), 2. Department of Materials Science and Engineering, School of Materials and Chemical Technology, Institute of Science Tokyo (Japan), 3. Hydrogen Boride Research Center, Tsukuba Institute for Advanced Research, University of Tsukuba (Japan), 4. Department of Applied Physics, Institute of Pure and Applied Sciences, University of Tsukuba (Japan), 5. Institute for Solid State Physics, The University of Tokyo (Japan), 6. Department of Applied Chemistry, Graduate School of Engineering, The University of Osaka (Japan), 7. The Advanced Institute for Materials Research, Tohoku University (Japan))

HB nanosheets are two-dimensional materials whose hydrogen release can be controlled by ultraviolet light, electrical stimulation, and heat. To date, modification with nitrogen-containing heterocyclic compounds and metal particles has been carried out to improve hydrogen release performance, enhance oxygen evolution reaction activity, and improve hydrogen storage properties. However, practical use under harsh conditions, such as high temperatures and neutron radiation, requires enhanced structural and chemical stability to prevent unintended hydrogen release by heat and light. In this study, we synthesized pyrazine-HB by introducing a small amount of pyrazine into HB to enhance their thermostability and photostability. Despite its low pyrazine content of approximately 2.9 mol%, Pyrazine-HB showed significantly improved thermal stability and greatly suppressed hydrogen release under ultraviolet and visible light irradiation.

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