The effects of surface coating with Ni-Al nano-films to the hydrogenation properties of the La₂Mg₁₇ alloy are studied in the paper. The reversible hydrogen storage capacities, thermodynamics and kinetics process are all improved for the coating samples, and the comprehensive performances reach the best when the sputtering time is 5min with the film thickness 71.7 nm. The dehydrogenation temperature of the coating sample can be reduced to about 560K from above 720K comparing to the body alloy. The XPS analysis shows that the Ni-Al film coating layer can act as the catalyst in the dehydrogenation process.

中文翻译：

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Ni-Al薄膜引起的La ₂ Mg ₁₇合金的表面改性导致改善的脱氢性能

研究了Ni-Al纳米膜表面涂层对La ₂ Mg ₁₇合金氢化性能的影响。涂层样品的可逆储氢能力，热力学和动力学过程均得到改善，当溅射时间为5min，膜厚为71​​.7nm时，综合性能达到最佳。与主体合金相比，涂层样品的脱氢温度可以从720K以上降低到约560K。XPS分析表明，Ni-Al膜涂层可在脱氢过程中充当催化剂。