摘要
将镁粉、微晶碳、铝粉反应球磨制备70Mg30CxAl系列储氢材料,XRD测试表明,复合材料主相为MgH2、Mg和Al,纳米晶粒在16.5 ～73.4 nm之间.随着Al质量分数的增加,材料的活化能降低显著,放氢速率增加明显,但储氢密度有所降低.在低温区放氢,Al质量分数越高,放氢量越大,放氢时间越短.
70Mg30CxAl-based hydrogen storage materials are prepared by reactive milling of magnesium,crystalline carbon and aluminum.XRD analysis shows that the diffraction peaks of MgH2,Mg and Al are apparent,and the crystallite size is 16.5-73.4 nm.Increasing the amount of aluminum,the activation energy of the material decreases and hydrogen desorption rate increases obviously,but the hydrogen capacity decreases.The material would release more hydrogen at a lower temperature in a shorter time when adding more Al.
出处
《现代化工》
CAS
CSCD
北大核心
2014年第4期105-107,109,共4页
Modern Chemical Industry
基金
国家自然科学基金项目(21176145)
关键词
镁
铝
吸放氢
活化能
magnesium
aluminum
hydrogen absorption desorption
activation energy
