Hydrogen storage properties of MgH2-(Sr,Ca)2AlH7 composite

被引：5
|
作者：
Liu, D. M. [1 ]
Fang, C. H. [1 ]
Zhang, Q. A. [1 ]
机构：
[1] Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan 243002, Anhui, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 485卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Hydrogen storage materials; Composite; Hydrogen storage property; Microstructure; ALUMINUM-HYDRIDE; SYSTEM; MGH2; DESORPTION; KINETICS; NAALH4; PERFORMANCES; MECHANISM; SR2ALH7; OXIDES;
D O I：
10.1016/j.jallcom.2009.05.114
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The hydrogen storage properties, phase components and surface characteristics of a newly designed MgH2-(Sr,Ca)(2)AlH7 composite doped with a little amount of TiF3 were studied in this paper. It was found that the MgH2-30 wt.% (Sr,Ca)(2)AlH7 composite doped with 2 mol% of TiF3 desorbed hydrogen quickly at 573 K. Moreover, it has a higher re-hydrogenation rate at the temperatures below 473 K under the hydrogen pressure of 1.0 MPa. The new Ti-contained species as well as the phases (Sr,Ca)F-2, (Sr,Ca)H-2 and (Sr,Ca)Al-4 formed during the dehydrogenation process prior to the hydrogen uptake distributes homogeneously on the surface of Mg particles, and has a good catalytic effect on the re-hydrogenation process of Mg phase consequently. (C) 2009 Elsevier B.V. All rights reserved
引用
收藏
页码：391 / 395
页数：5
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