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Hydrogen storage of binary nanoparticles composed of Mg and Pd

Author:
Satoshi Ogawa  Taishi Fujimoto  Tsuyoshi Mizutani  Masahiro Ogawa  Naoki Uchiyama  Kazuo Kato  Toshiaki Ohta  Tomoko Yoshida  Shinya Yagi  


Journal:
International Journal of Hydrogen Energy


Issue Date:
2015


Abstract(summary):

Abstract 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 H 2 gas. 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 MgH 2 in the NPs can not be dehydrogenated at the room temperature even if the catalytic effect of the Pd. Highlights • The P–C isotherms of the NPs composed of Mg and Pd are investigated without the exposure to the air. • The NPs are investigated by XAFS for the analyses of the chemical state and local structure. • The NPs can uptake hydrogen at room temperature but can not release that. • Irreversible hydrogenations of Mg and Pd are shown by XAFS analyses.


Page:
11895-11895


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