金属氮氢化合物的贮氢性能及反应机制评述

Review on Hydrogen Storage Properties and Reaction Mechanism of Metal-N-H Systems

介绍了金属氮氢化合物贮氢材料吸放氢性能和反应机制的研究进展,阐述了该系列贮氢材料的热力学和动力学性能及其影响因素。分析结果表明:Li-Mg-N-H系贮氢材料具有合适的热力学性能,其动力学问题成为制约该系列贮氢材料应用的瓶颈。根据两种反应机制理论讨论了Li-Mg-N-H系贮氢材料动力学问题中的关键控制步骤,并进一步分析了两种贮氢材料放氢反应机制的合理性和存在的问题。

The hydrogen storage properties and reaction mechanism for the hydrogen desorption of metal-N-H are described, and the effecting factors on the thermodynamics and kinetics of these materials are introduced. The result shows that the thermodynamic of Li-Mg-N-H hydrogen storage material was better than others while its kinetic was too poor for practical use. According to the two reaction mechanism theories, the control steps in the kinetic of Li-Mg-N-H systems are explained. And then, the advantage and disadvantage of two reaction mechanisms for hydrogen desorption of Metal-N-H are analyzed and discussed.