期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 446, 期 -, 页码 409-414出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2007.02.080
关键词
hydrogen absorbing materials; metal hydrides; nanostructured materials; catalysts
Experimental approaches for altering the thermodynamics and kinetics of light element hydride systems are discussed. Equilibrium hydrogen pressures and reaction enthalpies can be varied with additives that form new alloy or compound phases upon dehydrogenation. The formation of new phases lowers the dehydrogenated state enthalpy and effectively destabilizes the component hydrides. This strategy is illustrated for LiBH4 destabilized by MgH2, MgF2, MgS, and MgSe. The slow rates of hydrogen exchange in light element hydrides can be improved with catalysts and by reducing diffusion distances to the nanometer scale. The catalytic effects of a variety of transition metal sources on hydrogen exchange in the LiBH4/MgH2 system are described. The effects of reduced diffusion distances are illustrated using LiBH4 incorporated into a nanoporous carbon aerogel. (C) 2007 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据