[2P01-53] Poster Presentation

[2P37] Effects of high-temperature heating of hydrogen boride sheets under high-hydrogen partial pressure

*Yukihiro Yasuda¹, Kazuho Goto¹, Yuki Nakahara², Reina Utsumi², Hiroyuki Saitoh², Satoshi Nakano³, Shin-ichi Ito⁴, Miwa Hikichi⁴, Shin-ichi Orimo^5,6, Takahiro Kondo^4,5 (1. Graduate School of Pure and Applied Sciences, University of Tsukuba, 2. National Institutes for Quantum Science and Technology (QST), 3. National Institute for Materials Science, 4. Department of Materials Science and Tsukuba Research Center for Energy Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba, 5. Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 6. Institute for Materials Research (IMR), Tohoku University)

HB sheets are new 2D materials that is expected to have various functionalities. However, theoretical structure of HB sheets is only localized, so hydrogen dissociation temperature of HB sheets is very wide, and it is inconvenient to apply HB sheets to hydrogen storage materials with good performance. We tried to control structure of HB sheets by heating treatment under extreme conditions such as high-hydrogen partial pressure or ultrahigh pressure. We hoped this condition would prevent hydrogen desorption from HB sheets during heating. As a result, the peak of the hydrogen desorption temperature seemed to shift toward higher temperatures for the higher temperature treated samples. it is also interesting that the FTIR spectroscopy showed no significant differences from sample to sample, despite the temperature differences of hydrogen desorption up to 800 K or so.