Hydrogen storage of binary nanoparticles composed of Mg and Pd
Hydrogen storage of binary nanoparticles composed of Mg and Pd
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DOI：
10.1016/j.ijhydene.2015.04.087
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发表时间：
2015-09
影响因子：
7.2
通讯作者：
S. Ogawa;Taishi Fujimoto;Tsuyoshi Mizutani;M. Ogawa;N. Uchiyama;Kazuo Kato;T. Ohta;T. Yoshida;S. Yagi
中科院分区：
文献类型：
--
作者：
S. Ogawa;Taishi Fujimoto;Tsuyoshi Mizutani;M. Ogawa;N. Uchiyama;Kazuo Kato;T. Ohta;T. Yoshida;S. Yagi
在不暴露于空气中的情况下，用QCM技术研究了由Mg和Pd组成的二元纳米颗粒的储氢性能。采用He气体蒸发法制备了两种类型的纳米颗粒。一种是由Mg和Pd原子组成的纳米粒子（Mg -Pd NPs），另一种是由Mg和Pd原子组成的纳米粒子（Mg NPs-Pd NPs）。在室温和1atm H2gas条件下，Mg - pd NPs和Mg - NPs均能吸附氢气。然而，在两种样品中均未观察到氢的解吸现象。我们还用XPS和XAFS研究了NPs的化学状态。XAFS分析表明，即使在Pd的催化作用下，NPs中的mgh2也不能在室温下脱氢。
The hydrogen storage property of the binary nanoparticles composed of Mg and Pd has been investigated by the QCM technique without the exposure to the air. The two types of nanoparticles have been fabricated by the gas evaporation method with the He gas. The one is the nanoparticles composed of the both Mg and Pd atoms (Mg–Pd NPs) and the other one is the composite of the Mg and Pd nanoparticles (Mg NPs-Pd NPs). Both the Mg–Pd NPs and the Mg NPs-Pd NPs can absorb the hydrogen under the room temperature and 1 atm of H2gas. However, the desorptions of the hydrogen have not been observed about the both samples. We have also studied the chemical state of the NPs by XPS and XAFS. The XAFS analyses have revealed that the MgH2in the NPs can not be dehydrogenated at the room temperature even if the catalytic effect of the Pd.