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Study of hydrogen storage in Mg2Ni by thermal desorption spectrometry

被引：18
|
作者：
Itoh, H
Yoshinari, O
Tanaka, K
机构：
[1] Department of Materials Science and Engineering, Nagoya Institute of Technology, Nagoya
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1995年 / 231卷 / 1-2期
关键词：
hydrogen; thermal desorption spectrometry; surface effect; oxidation;
D O I：
10.1016/0925-8388(95)01868-9
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 of Mg2Ni have been investigated using thermal desorption spectrometry (TDS). After charging the pulverized Mg2Ni with hydrogen, the TDS spectrum was measured in situ from room temperature to 703 K. Such a hydrogen absorption-desorption cycle was repeated several times. A desorption peak was observed at about 515 K which increases during the first few cycles but then decreases beyond the sixth cycle. It was found that the peak shifts to 465 K and the hydrogen storage capacity is increased when the absorption is performed in an atmosphere containing 2 vol.% oxygen. The effect is explained in terms of metallic Ni segregation at the alloy surface.
引用
收藏
页码：483 / 487
页数：5
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