The catalyst-free hydrolysis behaviors of NaBH₄-NH₃BH₃ composites

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• 作者：Zhifen Huang ; Chaoling Wu ; ^{wuchaoling@scu.edu.cn} ; ^{wmeimeiw07@163.com} ; Yungui Chen ; Xiaolian Wang
• 关键词：NaBH4 ; NH3BH3 ; Composites ; Hydrolysis ; Catalyst-free
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：March, 2012
• 卷：37
• 期：6
• 页码：5137-5142
• 文件大小：781 K

摘要

NaBH₄-NH₃BH₃ composites were prepared by high-energy ball-milling processes for hydrogen generation through hydrolysis. After ball milling, there were no new phases found in the XRD patterns of NaBH₄-NH₃BH₃ composites. The experimental results demonstrate that when the molar ratios of NaBH₄-NH₃BH₃ composites range from 1:4 to 2:1, these composites can release above 90%hydrogen in 30聽min at 70聽掳C. Comparing with neat NaBH₄ or NH₃BH₃, the hydrolysis properties of these composites are greatly enhanced. And the hydrolysis reaction mechanism is turned out to be more explicit as Na₂B₄O₅(OH)₄路8H₂O appears in the hydrolysis products. Since the preparation processes of these composites are simple and cost-effective and the hydrolysis of these composites achieves efficient hydrogen release, it is promising that this kind of composites can be applied in hydrogen generation.