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Direct synthesis of MgH2 nanofibers at different hydrogen pressures

IJHE34-17_p7283-7290.pdf1.24 MBPDF見る/開く

タイトル: Direct synthesis of MgH2 nanofibers at different hydrogen pressures
著者: Zhu, Chunyu 著作を一覧する
Hayashi, Haruya 著作を一覧する
Saita, Itoko 著作を一覧する
Akiyama, Tomohiro 著作を一覧する
キーワード: Hydrogen storage
Magnesium hydride
Hydriding chemical vapor deposition
発行日: 2009年 9月
出版者: Elsevier Ltd.
誌名: International Journal of Hydrogen Energy
巻: 34
号: 17
開始ページ: 7283
終了ページ: 7290
出版社 DOI: 10.1016/j.ijhydene.2009.06.080
抄録: This paper describes the direct synthesis of magnesium hydride (MgH2) nanofibers by hydriding chemical vapor deposition (HCVD), in which the effect of hydrogen pressure on the production rate, the composition and the shape of products obtained were examined by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET). The XRD patterns showed that the main product in each case was MgH2; in particular, the products formed at 2, 3 and 4 MPa were highly pure. In contrast, at a hydrogen pressure of 1 MPa, unhydrided Mg was deposited along with MgH2. The SEM images also revealed orientation of the as-deposited products; higher pressures of 3 and 4 MPa caused the formation of straight and curved nanofibers, and lower ones of 1 and 2 MPa, highly curved nanofibers and nanorods with a few straight nanofibers. With pressurizing hydrogen, not only the BET specific surface areas of the products but also the production rate increased. The results also appealed that HCVD could control the shape/size of MgH2 nanofibers by changing the pressure via only a single operation.
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 秋山 友宏


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