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Doping effect of Nb species on hydrogen desorption properties of AlH3

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Title: Doping effect of Nb species on hydrogen desorption properties of AlH3
Authors: Nakagawa, Yuki Browse this author
Lee, Chung-Hyun Browse this author
Matsui, Kouki Browse this author
Kousaka, Kohei Browse this author
Isobe, Shigehito Browse this author
Hashimoto, Naoyuki Browse this author
Yamaguchi, Shotaro Browse this author
Miyaoka, Hiroki Browse this author
Ichikawa, Takayuki Browse this author →KAKEN DB
Kojima, Yoshitsugu Browse this author
Keywords: Hydrogen storage
Aluminum hydride
Niobium fluoride
Niobium oxide
Catalytic effect
Issue Date: 15-Feb-2018
Publisher: Elsevier
Journal Title: Journal of alloys and compounds
Volume: 734
Start Page: 55
End Page: 59
Publisher DOI: 10.1016/j.jallcom.2017.10.273
Abstract: Hydrogen desorption properties of alpha-AlH3 doped with Nb species (Nb, Nb2O5 and NbF5) were investigated. Doping Nb species improved the desorption properties of AlH3. In particular, 1 mol% NbF5-doped AlH3 showed the lowest onset desorption temperature at 60 degrees C. Compared with Nb- or Nb2O5-doped AlH3, the fine distribution of dopant was successfully achieved in NbF5-doped AlH3. The apparent activation energy for hydrogen desorption of AlH3 was slightly decreased with the dopant of NbF5. The improvement of desorption properties might be due to the finely dispersed Nb and/or AlF3, which are formed by the reaction between NbF5 and AlH3 (surface Al2O3).
Rights: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
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: 中川 祐貴

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