关键词: 氢, 化学反应, 金属氢化物, 配位氢化物, 有机液体氢化物, 催化

Abstract: As a high-efficient and clean energy carrier，hydrogen is regarded as the most potential energy in the 21th century. The key to large-scale hydrogen applications is hydrogen storage. Compared to physical hydrogen storage，chemical hydrogen storage is more efficient and safer. There exist three main chemical hydrogen storage technologies，which are metal hydrides，complex hydrides and organic liquid hydrides. The research progresses of these technologies were briefly reviewed. R-Mg-Ni type hydrogen storage alloy is a cheap alloy with high capacity found in recent years，but they are still too stable，and their hydrogenation / dehydrogenation performances are poor. Complex hydrides are rich in light metal elements so that they can store large quantities of hydrogen. But their reversible cycling performances are often too poor which limit their applications. Organic liquid hydrides not only have high hydrogen storage capacity，but also can be transported as gasoline at ordinary temperature and pressure. Furthermore，cyclohexane，benzene and other organic hydrogen storage medium can be produced in the industry of large scale. If dehydrogenation catalysts with good stability，high activity and large selectivity are developed，the large-scale application of hydrogen will be promoted substantially.

Key words: hydrogen, chemical reaction, metal hydrides, complex hydrides, organic liquid hydrides, catalysis