Hydrogen storage property of materials composed of Mg nanoparticles and Ni nanoparticles fabricated by gas evaporation method
Hydrogen storage property of materials composed of Mg nanoparticles and Ni nanoparticles fabricated by gas evaporation method
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DOI：
10.1016/j.ijhydene.2015.05.031
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发表时间：
2015-09-21
影响因子：
7.2
通讯作者：
Yagi, Shinya
中科院分区：
文献类型：
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作者：
Fujimoto, Taishi;Ogawa, Satoshi;Yagi, Shinya
我们制备了由Mg和Ni纳米颗粒组成的储氢材料，并通过TEM、XPS和QCM对其储氢性能进行了研究。采用气相蒸发法制备了Mg和Ni纳米颗粒，并进行了混合。Mg和Ni纳米颗粒的直径分别估计为20.0 +/-8.4和4.7 +/-2.0 nm。所制备的Mg和Ni纳米粒子表面几乎没有污染。该样品在30 ℃的大气压下可以吸收氢气，然后完全氧化。然而，即使在真空条件下，在制造结束后的几个小时内，该样品的储氢能力也已经由于残留气体的吸附而丧失。由于残留气体在纳米镁颗粒表面形成氧化镁壳层，阻碍了纳米镁颗粒的加氢反应。版权所有（C）2015，氢能出版物有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
We have fabricated the materials composed of the Mg and the Ni nanoparticles and clarified the hydrogen storage property by using TEM, XPS and QCM. The Mg and the Ni nanoparticles have been fabricated by gas evaporation method and been mixed. The diameters of the Mg and the Ni nanoparticles have been estimated as 20.0 +/- 8.4 and 4.7 +/- 2.0 nm, respectively. And the Mg and the Ni nanoparticles as prepared sample possess almost clean surface. This sample can absorb the hydrogen under atmospheric pressure at 30 degrees C before completely oxidized. However, the hydrogen storage ability of this sample has been lost by the adsorption of residual gases even under vacuum condition in several hours after the end of fabrication. Due to the Mg oxide shell on the surface of the Mg nanoparticles is formed by the residual gases, the hydrogenation of the Mg nanoparticles are hindered. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.