SiO_2包覆对含微量CO氢环境中LaNi_(4.25)Al_(0.75)吸氢动力学性能的影响

Xingbo Han,Hongguang Yang,Wei Chen, Yu Liu,Zifeng Lin,Demin Chen,Ke Yang

Rare Metal Materials and Engineering（2013）

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Abstract

采用气相二氧化硅法制备了LaNi4.25Al0.75/SiO2复合材料,研究了该复合材料表面形貌以及氢中微量CO对LaNi4.25Al0.75合金及LaNi4.25Al0.75/SiO2复合材料吸氢动力学性能的影响。结果表明:合金被毒化后,在表面生成含NiO、La(OH)3、La2O3、Al(OH)3的氧化层,并且吸附大量CO,导致合金的吸氢量减少,动力学变慢。表面包覆SiO2可显著改善合金抗毒化性能。

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Key words

metal hydride,LaNi4.25Al0.75/SiO2 composite,SiO2 encapsulation,poisoning resistance

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