摘要
应用ＳＩＭＳ方法对ＬａＮｉ４．７Ａｌ０．３贮氢合金被 ＣＯ毒化前后的表面进行了分析，结果表明： ＬａＮｉ４．７Ａｌ０．３贮氢合金毒化前 Ｃ， Ｏ峰不明显，毒化后 Ｏ峰明显增高， Ｃ峰明显出现毒化后生成了 Ｌａ－Ｃ， Ｌａ－Ｃ２和 Ｌａ－Ｏ的强键，并在合金表面形成了一层化合物薄膜，阻止贮氢合金进一步吸氢，导致 Ｌ３Ｎｉ４．７Ａｌ０．３贮氢合金吸氢量下降，吸氢速度降低．
The surface properties of the CO-treated LaNi4.7Al0.3 alloy were studied by secondary . ion mass spectroscopy. Surface compositions were analyzed and compared with that of the untreated sample. After CO treatment, the strong bonds of La-C, La-C2 and La-O formed and the hydrogen storage capacity of LaNi4.7Al0.3 declined during repeated hydrogen/dehydrogen cycling. The degradation behavior of hydrogen absorption kinetics took place.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第3期251-253,共3页
Acta Metallurgica Sinica
基金
四川省计委重点攻关项目和中国工程物理研究院院外基金项目
关键词
贮氢合金
表面分析
毒化
一氧化碳
CO, LaNi4.7Al0.3, hydrogen storage alloy, surface analysis
