Ability of hydrogen storage CeNi 5- x Ga x and Mg 2 Ni alloys to hydrogenate acetylene

Hydrogen storage properties and reactivity for hydrogenation of acetylene in a series of CeNi Ga ( = 0, 0.5, 0.75, 1, 1.25, 1.5) alloys and Mg Ni were determined and compared. The structure of CeNi (CaCu type) was maintained up to CeNi Ga when Ni was replaced by Ga. The replacement facilitated hydro...

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Bibliographic Details
Published in:Science and technology of advanced materials 2019-12, Vol.20 (1), p.774-785
Main Authors: Tsukuda, Ryota, Yamagishi, Ryo, Kameoka, Satoshi, Nishimura, Chikashi, Tsai, An-Pang
Format: Article
Language:English
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Summary:Hydrogen storage properties and reactivity for hydrogenation of acetylene in a series of CeNi Ga ( = 0, 0.5, 0.75, 1, 1.25, 1.5) alloys and Mg Ni were determined and compared. The structure of CeNi (CaCu type) was maintained up to CeNi Ga when Ni was replaced by Ga. The replacement facilitated hydrogenation absorption by creating larger interstitial spaces through expansion of the lattice, allowing CeNi Ga to absorb the greatest proportion of hydrogen atoms among the alloys under the same conditions. The results showed that the absorbed hydrogen in CeNi Ga improved reactivity. In contrast, Mg Ni formed a hydride upon hydrogenation of acetylene and thus possessed much lower activity. The difference of the activity of absorbed hydrogen between CeNi Ga and Mg Ni was confirmed from transient response tests under reaction gases alternately containing He and H .
ISSN:1468-6996
1878-5514
DOI:10.1080/14686996.2019.1629836