Catalytic hydrolysis of sodium borohydride by a novel nickel-cobalt-boride catalyst
Catalytic hydrolysis of sodium borohydride by a novel nickel-cobalt-boride catalyst
复制标题
DOI：
10.1016/j.jpowsour.2007.04.040
复制
发表时间：
2007-11-08
影响因子：
9.2
通讯作者：
Muthaiah, A.
中科院分区：
文献类型：
--
作者：
Ingersoll, J. C.;Mani, N.;Muthaiah, A.
为了设计便携式燃料电池用高效氢气发生器，采用化学还原法制备了镍钴硼化物（Ni-Co-B）催化剂，并研究了其在碱性NaBH 4溶液中的催化水解反应。在NaBH 4溶液中加入NaOH和不加入NaOH制备的催化剂的性能表现出不同的产氢动力学。采用Ni-Co-B催化剂测定了碱性NaBH 4溶液水解过程中氢生成速率与NaOH和NaBH 4浓度以及反应温度的关系。对于碱性NaBH 4溶液中较低的NaOH浓度，氢气生成速率增加，并且在15wt%达到最大值之后降低的NaOH。氢的产生速率被发现是恒定的相对于在碱性NaBH 4溶液中的NaBH 4的浓度。氢生成的活化能为62 kJ mol（-1），这与钌催化剂的氢生成的活化能相当。(C)2007 Elsevier B. V.保留所有权利。
With the aim of designing an efficient hydrogen generator for portable fuel cell applications nickel-cobalt-boride (Ni-Co-B) catalysts were prepared by a chemical reduction method and their catalytic hydrolysis reaction with alkaline NaBH4 solution was studied. The performance of the catalysts prepared from NaBH4 solution with NaOH, and without NaOH show different hydrogen generation kinetics. The rate of hydrogen generation was measured using Ni-Co-B catalyst as a function of the concentrations of NaOH and NaBH4, as well as the reaction temperature, in the hydrolysis of alkaline NaBH4 solution. The hydrogen generation rate increases for lower NaOH concentrations in the alkaline NaBH4 solution and decreases after reaching a maximum at 15 wt.% of NaOH. The hydrogen generation rate is found to be constant with respect to the concentration of NaBH4 in the alkaline NaBH4 solution. The activation energy for hydrogen generation is found to be 62 kJ mol(-1), which is comparable with that of hydrogen generation by a ruthenium catalyst. (C) 2007 Elsevier B.V. All rights reserved.