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Study on reaction mechanism of dehydrogenation of magnesium hydride by in situ transmission electron microscopy

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Title: Study on reaction mechanism of dehydrogenation of magnesium hydride by in situ transmission electron microscopy
Authors: Isobe, Shigehito Browse this author →KAKEN DB
Ono, Akifumi Browse this author
Yao, Hao Browse this author
Wang, Yongming Browse this author
Hashimoto, Naoyuki Browse this author
Ohnuki, Somei Browse this author →KAKEN DB
Keywords: chemical analysis
chemical interdiffusion
hydrogen storage
magnesium compounds
thermally stimulated desorption
transmission electron microscopy
Issue Date: 31-May-2010
Publisher: American Institute of Physics
Journal Title: Applied Physics Letters
Volume: 96
Issue: 22
Start Page: 223109
Publisher DOI: 10.1063/1.3442910
Abstract: In situ observation on dehydrogenation of MgH2 was performed by using transmission electron microscope (TEM). The dehydrogenation of MgH2 with 1 mol % Nb2O5 and formation of nanosized Mg particles were observed at 150℃. Nb2O5 was not confirmed in diffraction patterns and TEM images probably due to wide dispersion. On MgH2 with 10 mol % Nb2O5, the high resolution TEM could recognize the dehydrogenation at the interface between MgH2 and Nb2O5, proceeding with increasing temperature. This suggests that hydrogen atoms could diffuse from MgH2 phase to the interface between Mg and Nb2O5, resulting in formation of hydrogen molecules at the interface.
Rights: Copyright 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 96, 223109 (2010) and may be found at
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 礒部 繁人

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