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Direct synthesis of MgH2 nanofibers at different hydrogen pressures
| Title: | Direct synthesis of MgH2 nanofibers at different hydrogen pressures |
| Authors: | Zhu, Chunyu Browse this author | | Hayashi, Haruya Browse this author | | Saita, Itoko Browse this author | | Akiyama, Tomohiro Browse this author →KAKEN DB |
| Keywords: | Hydrogen storage | | Magnesium hydride | | Nanofiber | | Hydriding chemical vapor deposition |
| Issue Date: | Sep-2009 |
| Publisher: | Elsevier Ltd. |
| Journal Title: | International Journal of Hydrogen Energy |
| Volume: | 34 |
| Issue: | 17 |
| Start Page: | 7283 |
| End Page: | 7290 |
| Publisher DOI: | 10.1016/j.ijhydene.2009.06.080 |
| Abstract: | 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. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/39538 |
| Appears in Collections: | エネルギー・マテリアル融合領域研究センター (Center for Advanced Research of Energy and Material) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 秋山 友宏
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