First row transition metal ion-assisted ammonia-borane hydrolysis for hydrogen generation
First row transition metal ion-assisted ammonia-borane hydrolysis for hydrogen generation
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DOI：
10.1021/ic800805r
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发表时间：
2008-08-18
影响因子：
4.6
通讯作者：
Jagirdar, Balaji R.
中科院分区：
文献类型：
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作者：
Kalidindi, Suresh Babu;Indirani, M.;Jagirdar, Balaji R.
氨-硼烷（AB）水解制氢已经使用第一行过渡金属离子如Co 2+、Ni 2+和Cu 2+进行了研究。在钴和镍辅助的AB水解的情况下，形成对氢生成具有高催化活性的无定形粉末。对这些无定形粉末进行退火，然后进行粉末X射线衍射测量，分别揭示了Co（0）和Co 2B以及Ni（0）和Ni 3B的存在。另一方面，原位生成的H+和Cu（0）纳米粒子催化铜辅助AB水解。还研究了AB从相应的金属盐实现钴金属纳米颗粒的还原能力。发现这些还原反应是容易的，提供纯金属纳米颗粒的胶体。以这种方式制备的纳米粒子，其特征在于通过紫外可见光谱和高分辨率电子显微镜。
Ammonia-borane (AB) hydrolysis for the generation of hydrogen has been studied using first row transition metal ions, such as Co2+, Ni2+, and Cu2+. In the cases of cobalt- and nickel-assisted AB hydrolysis, amorphous powders are formed that are highly catalytically active for hydrogen generation. Annealing of these amorphous powders followed by powder X-ray diffraction measurements revealed the presence of Co(0) and Co2B and Ni(0) and Ni3B, respectively. On the other hand, copper-assisted AB hydrolysis was catalyzed by in situ generated H+ and Cu(0) nanoparticles. The reduction ability of AB for the realization of coinage metal nanoparticles from the respective metal salts has also been studied. These reduction reactions were found to be facile, affording colloids of pure metal nanoparticles. Nanoparticles prepared in this manner were characterized by UV-visible spectroscopy and high-resolution electron microscopy.