Controllable hydrogen generation and hydrolysis mechanism of AlLi/NaBH₄ system activated by CoCl₂ solution

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• 作者：Mei-Qiang Fan ; ^{fanmeiqiang@126.com} ; Shu Liu ; Wen Qiang Sun ; Yong Fei ; Hua Pan ; Kang-Ying Shu ; ^{shukangying@163.com}
• 关键词：Hydrogen generation ; AlLi alloy ; Sodium borohydride ; Cobalt dichloride ; Catalyst
• 刊名：Renewable Energy
• 出版年：2012
• 期刊代码：45_09601481
• 类别：pw
• 出版时间：October, 2012
• 卷：46
• 期：Complete
• 页码：203-209
• 文件大小：1102 K

摘要

Hydrogen generation performance of solid-state AlLi/NaBH₄ mixture activated by CoCl₂ solution was evaluated in the present work. Hydrogen generation performance can be regulated by AlLi/NaBH₄ weight ratio, Li content, CoCl₂ concentration, and hydrolysis temperature, among others. 1聽g Al-20 wt%Li/NaBH₄ mixture (weight ratio, 1:1) yields 1674聽mL hydrogen with 89%efficiency in 2.5 wt%CoCl₂ solution at 303聽K. The relative hydrolysis mechanism and optimized composition design are reported and discussed through the analysis of XRD, SEM, IR, and particle size distribution. The hydrolysis byproducts LiOH and Co₂B/Al(OH)₃ are the major factors to improve the hydrolysis performance of an AlLi/NaBH₄ mixture. Our experimental data show that the new method of hydrogen generation from AlLi/NaBH₄ hydrolysis activated by CoCl₂ solution may supply free CO₂, portable hydrogen for proton exchange membrane fuel cell.