储氢材料富镧混合稀土镍锰α相吸氢动力学研究

STUDY OF HYDROGEN ABSORPTION KINETICS IN α-PHASE OF THE HYDROGEN STORAGE MATERIAL MmNi4. 5Mn0. 5

本文讨论了储氢材料α相吸氢过程,在处理表面吸附解离反应时,以描述实际吸附解离反应的吸附等温式及对应的速率方程代替文献中普遍采用的、只适于理想吸附情况的Langmuir方程;所获得模型的计算值与实验数据比较符合。通过对富镧混合稀土镍锰MmNi4.5Mn0.5α相吸氢反应的实际处理,提出该反应的速率控制步骤随反应进程改变的反应机理。

This paper had an adequate discussion on determining of the rate equations of the elementary reactions of hydrogen absorption in α-phase. Replacing the Langmuir equation which can be applied only to ideal absorption and was applied unsuitably in literatures by two equations which can be applied to real absorption, the authors obtained better calculating results. In treating the experimental results of kinetics of hydrogen absorption in α-phase of the sample MmNi4.5Mn0.5, they suggested that the rate limiting step of the reaction should change as the hydrogen absorption reaction goes on.