摘要
将无烟煤进行脱灰和碳化,制备微晶碳,再将微晶碳和铝添加到镁中,用氢气反应球磨法制取镁/碳纳米复合储氢材料。用透射电子显微镜、选区电子衍射、X射线衍射和差示扫描量热分析对储氢材料的粒度、晶体结构和放氢温度进行了测定。结果表明,微晶碳是镁粉的高效助磨剂,添加40%（质量分数）的微晶碳,球磨3h,即可将镁磨至20～40nm;添加微晶碳和铝能降低储氢材料的放氢温度;微晶碳具有类似石墨结构,较易磨至纳米级,层片之间能够储氢。
The crystallitic carbon was prepared from anthracite by demineralization and carbonization,then the magnesium/carbon nanocomposites for hydrogen storage were manufactured through reaction milling of the mixture of magnesium,crystallitic carbon and aluminium under hydrogen atmosphere.Transmission electron microscopy,area electric diffraction,X-ray diffraction and differential scanning calorimetry were used to determine the particle size,crystal structure,and dehydriding temperature of the H2-storage material.It was shown that crystallitic carbon is a kind of effective milling aid.Magnesium particles decreased to 20-40nm by adding 40wt% of crystallitic carbon and milling for 3h.The crystallitic carbon and aluminium decreased the dehydriding temperature of the material.The crystallitic carbon of graphite structure was easy to be milled into nanoparticles and was able to store hydrogen within the carbon sheets.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第7期1128-1131,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50574054)
教育部留学回国人员科研基金资助项目(2005-383)
关键词
镁
微晶碳
储氢
反应球磨
magnesium
crystallitic carbon
hydrogen storage
reaction milling
