摘要
研究了贮氢合金LaNi4.7Al0 .3和MlNi4.5Al0 .5在纯氢 ( 99.999% )及氢中含CO气体杂质条件下的 p c t特性及循环性能。结果表明 ,合金经CO毒化后 ,平台压升高 ,平台倾斜加剧 ,平台宽度缩小 ,饱和吸氢量减小。毒化后两种贮氢合金的循环性能衰退 ,而且随着循环次数的增加吸氢量减少 ,增加CO的浓度 ,吸氢量减少更加明显。合金贮氢性能下降的原因可能是由于表面生成了氧化物及新相 ,阻止了氢的吸附与扩散。
The p c t degradation behaviours and cycling hydriding of LaNi 4.7 Al 0.3 and MlNi 4.5 Al 0.5 alloys were investigated by measuring the difference between pure hydrogen and hydrogen containing CO. The plateaus of LaNi 4.7 Al 0.3 and MlNi 4.5 Al 0.5 alloys were both lifted and inclined, the width of p c t curve was shorted, the absorbed hydrogen content was reduced drastically after poisoning. The amount of hydrogen absorbed was decreased continuously as the number of cycles was increased under same concentration of CO. The higher of the concentration of CO, the lower of the cycling properties. The reasons of poison was analyzed through XPS and XRD.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2000年第1期69-72,共4页
The Chinese Journal of Nonferrous Metals
基金
四川省计委重点攻关项目! (川计 1 997)
中国工程物理研究院院外基金!项目 ( 98-0 3 -0 71 4 )
关键词
一氧化碳
贮氢合金
毒化
carbon monoxide
hydrogen storage alloys
poisoning
