[2P01-53] Poster Presentation

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

*Natsumi Noguchi¹, Kazuho Goto¹, Shin-ichi Ito², Takeshi Fujita³, Hideo Hosono^4,5, Shin-ichi Orimo^6,7, Takahiro Kondo^2,6,8 (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.