Destabilization of the Mg-H System through Elastic Constraints

被引：167

作者：

Baldi, A. ^{[1
]}

Gonzalez-Silveira, M. ^{[1
]}

Palmisano, V. ^{[1
]}

Dam, B. ^{[2
]}

Griessen, R. ^{[1
]}

机构：

[1] Vrije Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands

[2] Delft Univ Technol, NL-2600 GA Delft, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 22期

关键词：

HYDROGEN-STORAGE; PHASE-TRANSITION; MAGNESIUM; ABSORPTION;

D O I：

10.1103/PhysRevLett.102.226102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

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 2 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 suggest an alternative route for the development of new hydrogen storage materials with optimized thermodynamic properties.

引用

页数：4