Hydrogen generation from coupling reactions of AlLi/NaBH₄ mixture in water activated by Ni powder

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• 作者：Shu LIU ; Liang-liang WANG ; Jun YAO ; Wen-qiang SUN ; Mei-qiang FAN ; ^{fanmeiqiang@126.com}
• 关键词：hydrogen generation ; AlLi alloy ; NaBH4 ; Ni
• 刊名：Transactions of Nonferrous Metals Society of China
• 出版年：2012
• 期刊代码：12_10036326
• 类别：ms
• 出版时间：May, 2012
• 卷：22
• 期：5
• 页码：1140-1145
• 文件大小：539 K

摘要

A novel composition of AlLi/NaBH₄ mixture activated by common Ni powder in water for hydrogen generation was investigated. The composition presents good hydrogen generation performance and an optimized Al-10%Li-10%Ni/NaBH₄ mixture (mass ratio of 3:1) generates 1540 mL/g hydrogen with 96%efficiency at 333 K. Ni powder exhibits dual catalytic effects on the hydrolysis of AlLi/NaBH₄ mixture due to the formation of Ni₂B in the hydrolysis process. The Ni₂B deposited on aluminum surface could act as a cathode of a micro galvanic couple. Ni₂B/Al(OH)₃ also has a synergistic effect on NaBH₄ hydrolysis. Good hydrogen generation performance with stable pH value of hydrolysis byproduct Al(OH)₃/NaBO₂路2H₂O was obtained with successive additions of Al-Li-Ni/NaBH₄ mixture into fixed water.