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

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[3B06] Interface design for enhanced hydrogen storage performance of Mg-based materials using Ni-MOF-derived Ni and Ti₃C₂ MXene

*Kazuki Tabata¹, Diya Singh², Sanket Kutiyar², Natsumi Noguchi¹, Kosei Fukuda¹, Osamu Oki^3,4, Takahiro Kondo^3,4,5,6,7, Sankara Sarma V Tatiparti² (1. Graduate School of Pure and Applied Sciences, University of Tsukuba (Japan), 2. Department of Energy Science and Engineering, Indian Institute of Technology Bombay (India), 3. Institute of Pure and Applied Sciences, University of Tsukuba (Japan), 4. Hydrogen Boride Research Center, Tsukuba Institute of Advanced Research, University of Tsukuba (Japan), 5. The Advanced Institute for Materials Research (WPI-AIMR), Tohoku University (Japan), 6. Tsukuba Research Center for Energy Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba (Japan), 7. Research Center for Energy and Environmental Materials, National Institute for Materials Science (Japan))

MgH₂ is a promising solid state hydrogen storage material owing to its high gravimetric hydrogen density, but high operating temperatures and slow absorption/desorption kinetics remain major challenges. In this study, Ni-MOF was used as a precursor for highly dispersed Ni species, and Ti₃C₂ was introduced as a support to stabilize Ni dispersion and improve MgH₂ hydrogen storage performance. The Mg-Ni@Ti₃C₂ composite showed a hydrogen uptake of about 4.2 wt% at 373 K under ~ 16 bar H₂ during the second uptake measurement, and hydrogen desorption occurred at around 593 K under vacuum at heating rate of 5 K/min. The first uptake/release process likely reflects material activation, including Ni-MOF decomposition. Ongoing work focuses on clarifying the Ni-MOF decomposition/reduction pathway and correlating the resulting Ni state with hydrogen storage kinetics.

Password required to view