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题名: Effects of triphenyl phosphate on the hydrogen storage performance of the Mg(NH2)(2)-2LiH system
作者: Wang, Jianhui1, 2;  Hu, Jianjiang1;  Liu, Yongfeng2;  Xiong, Zhitao3;  Wu, Guotao3;  Pan, Hongge2;  Chen, Ping1
刊名: JOURNAL OF MATERIALS CHEMISTRY
发表日期: 2009
DOI: 10.1039/b812653d
卷: 19, 期:15, 页:2141-2146
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: Mg(NH2)(2)-2LiH is an attractive system because of its high reversible hydrogen capacity (similar to 5.6 wt%) and suitable thermodynamic parameters that allow operation below 100 degrees C. However, a relatively high kinetic barrier in the hydrogen desorption blocks its application at low temperature. In this work, a small amount of additive, triphenyl phosphate (TPP), was introduced and its effects on hydrogen desorption/absorption in the Mg(NH2)(2)-2LiH system were studied. Experimental results showed that TPP can prevent aggregation/crystallization during the cycling tests and thus achieve an enhanced kinetic performance. Complete dehydrogenation and hydrogenation can be successfully carried out at temperatures below 150 degrees C. Moreover, a significant reduction of the entropy change of hydrogen desorption (DSdes) was found in the TPP-doped system compared with the pristine Mg(NH2)(2)-2LiH system, thought to be due to the persistence of amorphous Mg(NH2)(2) in the TPP-doped sample during dehydrogenation and hydrogenation cycling, thereby greatly affecting the equilibrium hydrogen pressure.
关键词[WOS]: N-H SYSTEM ;  ENTHALPIES ;  IMIDES ;  AMIDE
语种: 英语
WOS记录号: WOS:000264745300007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141357
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Natl Univ Singapore, Dept Phys, Fac Sci, Singapore 117542, Singapore
2.Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310003, Zhejiang, Peoples R China
3.Dalian Inst Chem Phys, Dalian, Peoples R China

Recommended Citation:
Wang, Jianhui,Hu, Jianjiang,Liu, Yongfeng,et al. Effects of triphenyl phosphate on the hydrogen storage performance of the Mg(NH2)(2)-2LiH system[J]. JOURNAL OF MATERIALS CHEMISTRY,2009,19(15):2141-2146.
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