Enhanced hydrogen capacity and absorption rate of LaNi_4.25Al_0.75 alloy in impure hydrogen by a combined approach of fluorination and palladium deposition

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• 作者：Botao Zhao ; ^{18518705396@163.com" class="auth_mail" title="E-mail the corresponding author} ; Lifei Liu ; Yiming Ye ; Shilin Hu ; Dong Wu ; Pingzhu Zhang
• 关键词：AB5-type alloy ; Surface treatment ; Palladium deposition ; Fluorination
• 刊名：International Journal of Hydrogen Energy
• 出版年：2016
• 出版时间：9 February 2016
• 年：2016
• 卷：41
• 期：5
• 页码：3465-3469
• 全文大小：1156 K

文摘

In this study, a new surface structure named ‘net mosaic’ is found to enhance the resistance against poisoning of compound alloy. The structure is composed of palladium nanospheres and fluorinated layer. Hydrogen capacity and characteristics absorption rate of F-0.5%Pd-LaNi_4.25Al_0.75 alloy are 1.147wt% and 0.062wt%/s in impure hydrogen containing O₂ and N₂ both of 0.1 at% under initial pressure of 0.71 MPa at 30 °C, respectively, which is remarkably raised by 10% and 68% than that of LaNi_4.25Al_0.75 alloy. Synergistic effect from fluorination and palladium deposition is proposed to illustrate the excellent performance of F-0.5%Pd-LaNi_4.25Al_0.75 alloy.