弹性约束下Mg-H系统的失稳
Destabilization of the Mg-H system through elastic constraints
摘要：
采用弹性夹持的方法对镁的吸氢热力学进行了调谐。氢谱法测得的负载等温线表明，覆盖有镁合金形成元素，如Pd和Ni的Mg膜，在相同的温度下，氢平台压力比体Mg高两个数量级以上。弹性模型使我们能够解释Mg厚度依赖的氢平台压力。研究结果为开发具有优良热力学性能的新型贮氢材料提供了依据。
英文摘要：
We tune the thermodynamics of hydrogen absorption in Mg by means of elastic clamping. The loading isotherms measured by hydrogenography show that Mg films covered with Mg-alloy-forming elements, such as Pd and Ni, have hydrogen plateau pressures more than two orders of magnitude higher than bulk Mg at the same temperature. An elastic model allows us to interpret the Mg thickness dependence of the hydrogen plateau pressure. Our results provide the basis for the development of new hydrogen storage materials with excellent thermodynamic properties.
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