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ID 20037
本文ファイル
著者
Fujii, Hironobu
キーワード
hydrogen absorbing materials
nanostructured materials
solid state reactions
thermodynamic properties
thermal analysis
NDC
物理学
抄録(英)
Hydrogen desorption properties of mechanically milled materials composed of nano-structural hydrogenated-graphite (CnanoHx) and alkali(-earth) metal hydride (MH; M = Na, Mg and Ca) were investigated from the thermodynamic and structural points of view. The hydrogen desorption temperature for all the CnanoHx and MH composites was obviously lower than that of the corresponding each hydride. In addition, the desorption of hydrocarbons from CnanoHx was significantly suppressed by making composite of CnanoHx with MH, even though CnanoHx itself thermally desorbs a considerably large amount of hydrocarbons. These results indicate that an interaction exists between CnanoHx and MH, and hydrogen in both the phases is destabilized by a close contact between polar C-H groups in CnanoHx and the MH solid phase. Moreover, a new type of chemical bonding between the nano-structural carbon (Cnano) and the Li, Ca, or Mg metal atoms may be formed after hydrogen desorption. Thus, the above metal-C-H system would be recognized as a new family of H-storage materials.
掲載誌名
Journal of Alloys and Compounds
432巻
1-2号
開始ページ
303
終了ページ
307
出版年月日
2007-04-25
出版者
Elsevier B.V.
ISSN
0925-8388
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2006 Elsevier B.V.
関連情報URL
部局名
自然科学研究支援開発センター
先進機能物質研究センター