研究了铝基复合材料在铝水反应过程中的制氢性能,所用的铝基复合材料由高能机械球磨法制备。发现在Al-Bi-Na Cl体系中添加少量的碱金属(锂、钠、钾)或氢化物(Li Al H4、Li BH4)后,材料在室温下纯水中的放氢量和放氢速率都有了很大提高,通过调整掺杂物的种类和添加量,得到性能相对最佳的铝基复合材料拥有高达2 016 m L/(min·g)的初始放氢速率,并且能在1 min内放出几乎全部的理论产氢量。
The performance of hydrogen generation for new Al-based materials during hydrolysis reaction was investigated. The composites were prepared by high energy ball milling. By adding several kinds of alkali metals (such as Li, Na, K, etc.) and complex hydrides (such as LiAlH4, LiBH4, etc.) into the Al-Bi-NaCl composites, it is found that the kinetics and yield in hydrolysis reaction with pure water at room temperature improve. The optimized AI alloy (Al-Bi-NaCl-LiAlH4) demonstrates a high initial hydrogen generation rate (2 016 mL/(min·g)] and could release all the theoretic hydrogen in 1 min.