論文

査読有り
2011年5月

Ammonia Desorption Property and Structural Changes of LiAl(NH2)(4) on Thermal Decomposition

JOURNAL OF PHYSICAL CHEMISTRY C
  • Taisuke Ono
  • ,
  • Keiji Shimoda
  • ,
  • Masami Tsubota
  • ,
  • Shinji Kohara
  • ,
  • Takayuki Ichikawa
  • ,
  • Ken-ichi Kojima
  • ,
  • Masataka Tansho
  • ,
  • Tadashi Shimizu
  • ,
  • Yoshitsugu Kojima

115
20
開始ページ
10284
終了ページ
10291
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/jp111656v
出版者・発行元
AMER CHEMICAL SOC

A composite material of LiAl(NH2)(4) and LiH irreversibly releases H-2 gas by 6.1 mass% below 130 degrees C. The H-2 desorption mechanism of the composite has been proposed, but it is still controversial because the decomposition mechanism of LiAl(NH2)(4) is not well-known. We here examined the gas desorption property of LiAl(NH2)(4) by using thermogravimetry and mass spectroscopy. On heating to 160 degrees C, a large amount of NH3 release was observed, which was followed by mild gas emission until 500 degrees C. We investigated the detailed structural changes on the NH3 gas desorption by using synchrotron X-ray total scattering, infrared spectroscopy, and nuclear magnetic resonance spectroscopy. On the basis of these structural analyses, we obtained, strong evidence that the amorphous intermediate product described as LiAl(NH2)x(NH)(y)N-z was formed during the thermal decomposition process, where the AlN4 network polymerization proceeds and the ratio of [NH2](-), [NH](2-), and [N](3-) units gradually changes with releasing NH3 gas. Finally, the crystalline Li3AlN2 and the amorphous residue, which will become AlN with longer annealing, were formed because of the complete exhaustion of hydrogen atoms by NH3 desorption.

リンク情報
DOI
https://doi.org/10.1021/jp111656v
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000290652200058&DestApp=WOS_CPL
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-79959981434&partnerID=MN8TOARS
URL
http://orcid.org/0000-0003-4600-3437
ID情報
  • DOI : 10.1021/jp111656v
  • ISSN : 1932-7447
  • ORCIDのPut Code : 30160803
  • SCOPUS ID : 79959981434
  • Web of Science ID : WOS:000290652200058

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