研究了储氢薄膜材料在两相区范围内的吸氢动力学 ,它包括 4个动力学过程 :氢在气 /固表面的化学吸附 ,氢原子的表面渗透 ,氢原子在氢化物层的扩散和金属 /氢化物界面上的氢化物生成。计算结果表明 :当吸氢压强较低时 ,反应主要受化学吸附步骤控制 ;在压强较高 (pH2 peq)和薄膜吸氢的后期 ,表面渗透、扩散和相转变步骤都有可能成为反应速率控制步骤。 Hydrogen absorption kinetics of the hydrogen storage thin film material in the two-phase region is studied. It includes four kinetic processes: chemical adsorption of hydrogen on the gas / solid surface, surface penetration of hydrogen atoms, diffusion of hydrogen atoms in the hydride layer And hydride generation at the metal / hydride interface. The results show that the reaction is mainly controlled by the chemisorption step when the pressure of hydrogen absorption is low. At the later stage of high pressure (pH 2 peq) and hydrogen absorption, the surface permeation, diffusion and phase transformation steps are likely to be reaction rate control step.