| 초록 |
LiBH4 has been one of promising candidates as the solid-state hydrogen storage materials since it has high gravimetric and volumetric hydrogen storage capacities (18 wt%, 121 Kg/m3 H2). However, the thermodynamic and the kinetic properties of LiBH4 are not appropriate to use it at the ambient conditions. To overcome these drawbacks, the nano-confinement of LiBH4 using nano-porous materials is the most effective method by keeping the size and the circumstances after reactions. In 2010, Turnbull reported that the melt-infiltrated LiBH4 into the NaY zeolite showed that the dehydrogenation temperature was decreased by ~ 100 C. Inspired by the results, we prepared the samples which are the melt-infiltrated LiBH4 into Pt nanoparticle doped NaY, to obtain synergetic effects of Pt nano-particles with nano-confined LiBH4. We measured in situ x-ray diffraction patterns of the samples with different Pt contents at various temperatures. In this present, the roles of Pt nanoparticles and zeolite frameworks on to the dehydrogenation of LiBH4 are discussed using the results of the x-ray diffraction measurement, TG-MS, DSC and BET. |
