不同催化剂对氢化铝锂(LiAlH4)可逆性能的影响

Effect of Additives on the Reversibility of Lithium Alanate (LiAlH4)

摘要:

通过PCT(Pressure-Content-Temperature)设备研究了不同催化剂Ti、Ni、Fe、Ce(SO4)2 和 LaCl3对LiAlH4可逆储氢性能的影响。结果表明掺杂明显降低了试样的放氢速率，此外除了LaCl3,其他的掺杂还降低了试样的放氢温度，试样的放氢量也明显地下降了。掺杂1 mol% Ni, 1 mol% Ti, 1 mol% Ce(SO4)2 和 1 mol%LaCl3的LiAlH4可逆吸氢的研究发现，在180 ℃ 和 8 MPa氢压的条件下，掺杂1 mol% Ni的试样表现出

Abstract:

The effect of various catalysts, such as Ti, Ni, Fe, Ce(SO4)2 and LaCl3, on the reversibility of LiAlH4 was studied by Pressure-Content-Temperature (PCT) experiments. The result indicates that doping induces a marked decrease in the rate of hydrogen release. In addition, doping additives obviously decreases the initial temperature of LiAlH4 of hydrogen release except for doping with LaCl3. However, at the same time, the amount of hydrogen release also decreases. In the study on the hydrogen absorption of LiAlH4 doped with 1mol% Ni, 1mol% Ti, 1 mol% Ce(SO4)2 and 1mol%LaCl3 at 180 ℃ under about 8 MPa, it has been found that the sample doped with 1 mol% Ni presents the largest hydrogen absorption amount with about 0.97wt%.