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通过PCT设备和XRD对掺杂Ti和Fe的LiAlH4试样进行了研究。结果表明:掺杂Ti和Fe都明显地降低了LiAlH4的放氢温度、放氢量和放氢速率,其中掺杂5mol%Fe试样的放氢温度降低最低,并且放氢量明显地高于掺杂Ti试样的放氢量;和掺杂5mol%Ti的试样相比,掺杂5mol%Fe的试样在第一分解阶段的分解速率明显低于前者;对于经过250 ℃热分解后的掺杂5mol% Fe 和1、3、5mol%Ti的试样的XRD分析结果显示,掺杂催化剂并没有引起晶体结构的变化,也没有发现Ti和Fe相或含Ti和Fe的第二相的存在
LiAlH4 samples doped with Ti and Fe were investigated by PCT equipment and XRD. The results show that both Ti and Fe doping significantly reduce the hydrogen desorption temperature, hydrogen desorption and desorption rate of LiAlH4. The desorption temperature of LiAlH4 is the lowest, and the hydrogen desorption capacity is obviously higher than Compared with the sample doped with 5mol% Ti, the decomposition rate of the sample doped with 5mol% Fe is obviously lower than the former in the first decomposition stage; for the sample after the thermal decomposition at 250 ℃ XRD analysis of samples doped with 5 mol% Fe and 1, 3 and 5 mol% Ti showed that the doping catalyst did not cause any change in the crystal structure, and neither Ti and Fe phases nor a second phase containing Ti and Fe The presence