Hydrogen generation from hydrolysis of sodium borohydride using sulfonated porous carbon as reagent/catalyst
Hydrogen generation from hydrolysis of sodium borohydride using sulfonated porous carbon as reagent/catalyst
复制标题
以磺化多孔碳为试剂/催化剂水解硼氢化钠制氢
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Pouretedal Hamid Reza
中科院分区：
文献类型：
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作者：
S. Arash;Z. Abbas;Pouretedal Hamid Reza
在不同的H+与NaBH 4的摩尔比下，研究了硼氢化钠作为氢气源的水解。磺化多孔碳（SPC）被用作氢离子源和催化剂。结果表明，磺化多孔炭在室温下对NaBH 4的水解反应具有较高的催化活性，与Amberlyst-15和Nafion-NR 50相比，磺化多孔炭的催化活性更高。水解反应的动力学速率常数通过测量作为时间的函数的放出的氢气来计算。与空白水解反应相比，SPC作为固体酸/催化剂存在下NaBH 4水解的动力学速率常数增加约7.6倍。当H +（SPC）/NaBH 4从0.25增加到1.50时，反应动力学速率常数kapp，s-1从0.023增加到0.626。当H + /NaBH_4摩尔比为1时，反应时间为25 s时，反应效率为91%。
The hydrolysis of sodium borohydride as a source of hydrogen gas is studied at different mole ratios of H+ to NaBH4. The sulfonated porous carbon (SPC) is used as a source of hydrogen ion and catalyst. It is found that the sulfonated porous carbon exhibits high activity for the hydrolysis of NaBH4 to generate hydrogen gas at room temperature in comparison to Amberlyst-15 and Nafion-NR50. The kinetic rate constant of hydrolysis reaction is calculated by measurement of the evolved hydrogen gas as a function of time. The kinetic rate constant of NaBH4 hydrolysis is approximately increased 7.6 times at presence of SPC as a solid acid/catalyst versus blank hydrolysis reaction. The activation energy of sodium borohydride hydrolysis is obtained 1.24 KJmol -1 .The kinetic rate constant (kapp, s -1 ) of hydrogen generation reaction increased from 0.023 to 0.626 with increasing of H + (SPC)/NaBH4 from 0.25 to 1.50. The SPC activity with mole ratio of H + /NaBH4=1 show an efficiency of 91% at time 25s.