掺Ti球磨NaH/Al复合物的微结构和储氢特性  

Microstructure and Hydrogen Storage Properties of Ti-Doped NaH/Al Composites Prepared by Ball-milling

作　　者：王新华[1] 肖学章[1] 陈立新[1] 李寿权[1] 陈长聘[1] 

机构地区：[1]浙江大学材料与化工学院,杭州310027

出　　处：《高等学校化学学报》2006年第7期1360-1362,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:50471042)资助

摘　　要：In this paper,the microstructure and hydrogen storage properties of the（NaH/Al）+x（molar fraction,%） Ti（x=0,4,6, 10） composites were investigated.It was found that the reversible hydrogen storage properties can be improved by mechanically ball-milling the（NaH/Al） mixture together with Ti powder.H2 is a better ball-milling atmosphere than Ar,because a part of NaH is consumed during the ball-milling under an Ar atmosphere.As the Ti content increases,the hydrogen storage properties are enhanced gradually.In case of x=10,the reversible hydrogen absorption/desorption capacities of the composites milled for 6 h under the H2 atmosphere reach 4.01% and 3.93%（mass fraction）,respectively.The catalytic mechanism of the Ti-doped NaH/Al composites system is discussed briefly.In this paper, the microstructure and hydrogen storage properties of the （NaH/Al） ＋ x （ molar fraction, % ） Ti（x = 0, 4, 6, 10） composites were investigated. It was found that the reversible hydrogen storage properties can be improved by mechanically ball-milling the （NaH/Al） mixture together with Ti powder. H2 is a better ball-milling atmosphere than Ar, because a part of Nail is consumed during the ball-milling under an Ar of H2 atmosphere. As the Ti content increases, the hydrogen storage properties are enhanced gradually. In case x = 10, the reversible hydrogen absorption/desorption capacities of the composites milled for 6 h under the atmosphere reach 4.01% and 3.93% （ mass fraction）, respectively. The catalytic mechanism of the Tidoped NaH/Al composites system is discussed briefly.

关 键 词：络合氢化物 储氢性能 机械球磨 NaAlH4 TI 

分 类 号：O643[理学—物理化学] TG139[理学—化学]