论文部分内容阅读
实验分析了LaCl3和La2O3对LiAlH4-NH4Cl体系放氢性能的影响。结果显示,掺杂La2O3缩短了试样的放氢起始时间,并且提高了试样的放氢速率。然而,掺杂LaCl3明显降低了试样的放氢速率。进一步的研究显示,随着LaCl3和La2O3加入量的增加,除了掺杂3 mol%LaCl3的试样,其它的试样在180 min内的放氢量显示出了一个逐步降低的趋势。此外,掺杂La2O3试样的最大放氢量明显高于掺杂LaCl3试样。除此以外,SEM分析结果显示,掺杂试样与未掺杂试样的微观结构都是相似的,没有显示出明显的不同。
The effects of LaCl3 and La2O3 on the hydrogen desorption performance of LiAlH4-NH4Cl system were analyzed experimentally. The results show that doped La2O3 shortens the initial hydrogen release time and increases the hydrogen release rate. However, LaCl3 doping significantly reduced the hydrogen release rate of the sample. Further studies showed that with the addition of LaCl 3 and La 2 O 3, the amount of hydrogen desorbed by other samples showed a gradual decreasing trend except for the samples doped with 3 mol% LaCl 3. In addition, the maximum amount of hydrogen released from the doped La2O3 sample is obviously higher than that of the doped LaCl3 sample. In addition, the SEM analysis shows that the microstructures of the doped and undoped samples are similar and do not show obvious differences.