Study on Hydrogen Release Capacity of LiAlH4 Doped with CeO2

摘要:

通过PCT设备和SEM分析方法主要分析了CeO2对LiAlH4放氢性能的影响。结果显示，掺杂 CeO2明显缩短了LiAlH4的氢分解时间。在所有的试样中，掺杂2 mol% CeO2的试样开始放氢时间最早。有关放氢量的研究发现，掺杂1 mol% CeO2的试样具有最大的放氢量。并且随着掺杂量从1 mol%到5 mol%增加，试样的总放氢量表现出一个下降趋势。进一步有关微观结构的研究发现，掺杂CeO2没有引起LiAlH4微观结构的变化，所有的试样都显示出一种絮状结构

Abstract:

This study mainly analyzed the effect of CeO2 on the hydrogen release capacity of LiAlH4 by PCT (Pressure-Composition-Temperature) device and SEM (Scanning Electron Microscope) analysis method. The results show that with CeO2 doping shortens markedly the time of hydrogen release of LiAlH4. Among all samples, the dehydrogenation time of the sample doped with 2 mol% CeO2 is the earliest. The study on the amount of hydrogen release finds that the sample doped with 1 mol% CeO2 presents the largest dehydrogenation amount. And with the increase of the doping amount from 1 mol% to 5 mol%, the total hydrogen release amount of the samples presents a decrease trend. Furthermore, the study on microstructures show that doping with CeO2 does not cause any obvious change of the microstructure of LiAlH4, and all samples show a kind of flocculent structure