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Kinetic study of carbon nanotube synthesis over Mo/Co/MgO catalysts
http://hdl.handle.net/2241/104137
http://hdl.handle.net/2241/1041372e8686ff-27ac-40cb-9959-8f2ae4ae99f7
名前 / ファイル | ライセンス | アクション |
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CARBON_44-11.pdf (4.3 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2009-12-17 | |||||
タイトル | ||||||
タイトル | Kinetic study of carbon nanotube synthesis over Mo/Co/MgO catalysts | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Ni, Lei
× Ni, Lei× Kuroda, Keiji× Zhou, Ling-Ping× Kizuka, Tokushi× Ohta, Keishin× Matsuishi, Kiyoto× Nakamura, Junji |
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著者別名 |
木塚, 徳志
× 木塚, 徳志× 松石, 清人× 中村, 潤児 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The kinetics of carbon nanotube (CNT) synthesis by decomposition of CH4 over Mo/Co/MgO and Co/MgO catalysts was studied to clarify the role of catalyst component. In the absence of the Mo component, Co/MgO catalysts are active in the synthesis of thick CNT (outer diameter of 7–27 nm) at lower reaction temperatures, 823–923 K, but no CNTs of thin outer diameter are produced. Co/MgO catalysts are significantly deactivated by carbon deposition at temperatures above 923 K. For Mo-including catalysts (Mo/Co/MgO), thin CNT (2–5 walls) formation starts at above 1000 K without deactivation. The significant effects of the addition of Mo are ascribed to the reduction in catalytic activity for dissociation of CH4, as well as to the formation of Mo2C during CNT synthesis at high temperatures. On both Co/MgO and Mo/Co/MgO catalysts, the rate of CNT synthesis is proportional to the CH4 pressure, indicating that the dissociation of CH4 is the rate-determining step for a catalyst working without deactivation. The deactivation of catalysts by carbon deposition takes place kinetically when the formation rate of the graphene network is smaller than the carbon deposition rate by decomposition of CH4. | |||||
書誌情報 |
Carbon 巻 44, 号 11, p. 2265-2272, 発行日 2006-09 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0008-6223 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00598943 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.carbon.2006.02.031 | |||||
権利 | ||||||
権利情報 | © 2006 Elsevier Ltd. | |||||
著者版フラグ | ||||||
値 | author | |||||
出版者 | ||||||
出版者 | Elsevier Ltd. | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/104137 | |||||
識別子タイプ | HDL | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf |