2023年日本表面真空学会学術講演会

講演情報

ポスター発表

[2P01-53] Poster Presentation

2023年11月1日(水) 17:00 〜 18:30 ポスター (1階)

[2P33] Reduction of hydrogen release temperature by loading MgH2 on Ni/HB nanocomposites

*Natsumi Noguchi1, Kazuho Goto1, Shin-ichi Ito2, Takeshi Fujita3, Hideo Hosono4,5, Shin-ichi Orimo6,7, Takahiro Kondo2,6,8 (1. Graduate School of Pure and Applied Sciences, University of Tsukuba, 2. Department of Materials Science and Tsukuba Research Center for Energy Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba, 3. School of Environmental Science and Engineering, Kochi University of Technology, 4. Materials Research Center for Element Strategy, Tokyo Institute of Technology, 5. Research Center for Material Nanoarchitectonics, National Institute for Material Science, 6. Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 7. Institute for Materials Research (IMR), Tohoku University, 8. Tsukuba Research Center for Energy Materials Science (TREMS), Institute of Pure and Applied Sciences, and R&D Center for Zero CO2 Emission Functional Materials, University of Tsukuba)

Magnesium-based alloys, especially MgH2, are in the spotlight as hydrogen storage materials. However, it is crucial to overcome the following issues; slow hydrogen desorption/absorption caused by strong Mg-hydrogen bonding, and reduced hydrogen absorption capacity during the cycle due to catalyst and MgH2 aggregation. A widely used and effective solution is to support microfabricated MgH2 on two-dimensional materials, often in combination with catalysts. This prevents aggregation of MgH2 and catalyst, and improves the effectiveness and repeatability of the catalyst. This study focuses on MgH2 supported on a Ni/HB (Ni nanoclusters supported hydrogen boride sheets) composite (MgH2-Ni/HB), aiming to demonstrate a lower hydrogen release temperature. The composite prevents aggregation of MgH2 and catalyst, thereby achieving a lower hydrogen release temperature.

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