Carbon-supported Ni3B nanoparticles as catalysts for hydrogen generation from hydrolysis of ammonia borane
Carbon-supported Ni3B nanoparticles as catalysts for hydrogen generation from hydrolysis of ammonia borane
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DOI：
10.1016/j.ijhydene.2014.02.122
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发表时间：
2014-04
影响因子：
7.2
通讯作者：
Shan Xiaoling;Jing Du;F. Cheng;Jing Liang;Zhanliang Tao;Jun Chen
中科院分区：
文献类型：
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作者：
Shan Xiaoling;Jing Du;F. Cheng;Jing Liang;Zhanliang Tao;Jun Chen
报道了Ni 3B和碳载Ni 3B（记为Ni 3B/C）纳米粒子的制备及其对氨硼烷（NH3 BH 3，AB）水解脱氢制氢的催化性能。在四甘醇溶液中通过化学还原和晶化制备了Ni 3B和Ni 3B/C。所得Ni 3B催化剂处于明确的晶态，并且Ni 3B/C催化剂在碳中具有高分散性。产氢性能测试表明，碳载Ni 3B催化剂在AB水解脱氢反应中表现出更高的活性。在所制备的Ni 3B/C催化剂中，Ni 3B负载量为34.25wt%的Ni 3B/C显示出最好的催化活性，提供了1168 mL min−1g− 1的高氢气释放速率和46.27 kJ mol−1的较低活化能。动力学结果表明，水解反应对催化剂浓度为一级反应，对AB浓度为零级反应。此外，Ni 3B/C催化剂在温和的反应条件下可循环使用，表明碳载Ni 3B是一种很有前途的AB水解脱氢催化剂。
We report the preparation of Ni3B and carbon-supported Ni3B (denoted as Ni3B/C) nanoparticles, and their catalytic performance for hydrogen generation from hydrolytic dehydrogenation of ammonia borane (NH3BH3, AB). Ni3B and Ni3B/C were prepared via a chemical reduction and crystallization in tetraethylene glycol solution. The obtained Ni3B catalysts are in well-defined crystalline state and Ni3B/C catalysts have a high dispersion in the carbon. The hydrogen generation measurement shows that the carbon-supported Ni3B presents enhanced catalyst activity during hydrolytic dehydrogenation of AB. Among the as-prepared Ni3B/C catalysts, Ni3B/C with 34.25 wt% Ni3B loading displays the best catalytic activity, delivering a high hydrogen release rate of 1168 mL min−1g−1and the lower activation energy of 46.27 kJ mol−1. The kinetic results show that the hydrolysis is a first-order reaction in catalyst concentration, while it is a zero-order in AB concentration. Furthermore, the Ni3B/C is a recyclable catalyst under mild reaction conditions, indicating that the carbon-supported Ni3B is a promising catalyst for AB hydrolytic dehydrogenation.