F^(-1)对NaAlH_4和LiAlH_4放氢性能的影响(英文)

Effect of F^(-1) on the Hydrogen Release Properties of NaAlH_4 and LiAlH_4

使用PCT设备分析了NaF和LiF对NaAlH4和LiAlH4放氢性能的影响。结果显示,除了掺杂0.5 mol%,4 mol%NaF的试样外,掺杂NaF明显提高了NaAlH4的放氢量。此外,掺杂NaF还增加了NaAlH4第1阶段的放氢速率。在所有的掺杂NaF的试样中,掺杂1 mol%NaF的试样的放氢量是最大的,并且放氢速率也是最快的。相比之下,掺杂LiF使得LiAlH4的放氢量明显降低了。

This study mainly analyzed the effect of NaF and LiF on the hydrogen release properties of NaA1H4 and LiA1H4 by PCT （pressure-composition-temperature） apparatus. The results show that doping with NaF causes an obvious increase of the hydrogen release amount of NaA1H4 except for the doping with 0.5 tool%, 4 mol% NaF. In addition, the doping with NaF induces an increase of the hydrogen release rate in the first stage. Among all the samples doped with NaF, the sample doped with lmol% NaF presents the optimal hydrogen release properties with the largest hydrogen release amount and the fastest hydrogen release rate. Comparatively, the results from the study on the LiAIH4 doped with LiF show that doping with LiF decreases obviously the hydrogen release amount of LiAIH4.