Microscopic Study on Hydrogenation Mechanism of MgH2 Catalyzed by Nb2O5

Shigehito Isobe; Ayaka Umeda; Takenobu Wakasugi; Tao Ma; Ryo Yamagami; Satoshi Hino; Yongming Wang; Naoyuki Hashimoto; Somei Ohnuki

doi:10.2320/matertrans.MG201417

この記事には本公開記事があります。本公開記事を参照してください。
引用する場合も本公開記事を引用してください。

Microscopic Study on Hydrogenation Mechanism of MgH₂ Catalyzed by Nb₂O₅

Shigehito Isobe, Ayaka Umeda, Takenobu Wakasugi, Tao Ma, Ryo Yamagami, Satoshi Hino, Yongming Wang, Naoyuki Hashimoto, Somei Ohnuki

著者情報

キーワード: hydrogen storage materials, magnesium hydride, transmission electron microscopy

ジャーナルフリー早期公開

論文ID: MG201417

DOI https://doi.org/10.2320/matertrans.MG201417

この記事には本公開記事があります。

The final version of this article is now available: Vol. 55 (2014), No. 8 pp. 1175-1178

詳細

抄録

We propose the microstructural change model of magnesium hydride catalyzed by Nb₂O₅ during hydrogenation. The ball-milled composites, MgH₂ and 1 mol% Nb₂O₅, were dehydrogenated and then rehydrogenated for varied time at room temperature under 0.1 MPa H₂ atmosphere. The crystallite size of Mg and MgH₂ was evaluated by powder X-ray diffraction (XRD) measurement and confirmed by transmission electron microscopy (TEM) observation. The crystallite size of generated MgH₂ was smaller than that of Mg and did not change significantly with increasing time of hydrogenation. It is suggested that the number density of MgH₂ crystallites increases during the hydrogenation process.

責任著者(Corresponding author)

J-STAGEへの登録はこちら（無料）