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题名: Improved kinetics of the Mg(NH2)(2)-2LiH system by addition of lithium halides
作者: Cao, Hujun1, 2;  Wang, Han2;  He, Teng2;  Wu, Guotao2;  Xiong, Zhitao2;  Qiu, Jieshan1;  Chen, Ping2, 3
刊名: RSC ADVANCES
发表日期: 2014
DOI: 10.1039/c4ra02864c
卷: 4, 期:61, 页:32555-32561
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The Mg(NH2)(2)-2LiH composite is a promising on-board hydrogen storage material due to its high reversible hydrogen capacity and suitable thermodynamic properties. However, the severe kinetic barrier inhibits its low temperature operation. In the present work, the additive effects of lithium halides on the Mg(NH2)(2)-2LiH system were studied systematically. Experimental results showed that, among all those lithium halides, the LiBr doped Mg(NH2)(2)-2LiH composite exhibited the best dehydrogenation performance. The hydrogen sorption and desorption rates of the Mg(NH2)(2)-2LiH-0.2LiBr sample are similar to 3 and 2 times, respectively, faster than that of the pristine sample at 140 degrees C. At the same time, enhanced kinetics for hydrogen desorption was observed from an activation energy (E-a) of ca. 92 +/- 9 kJ mol(-1) which was significantly decreased by 35 kJ mol(-1) compared with the pristine sample. Subsequently, a plausible mechanism for the modified dehydrogenation/re-hydrogenation process was proposed.
关键词[WOS]: MG-N-H ;  HYDROGEN STORAGE PROPERTIES ;  ADVANCED REACTOR CONCEPT ;  AMIDE-HALIDE ;  DESORPTION ;  LIBH4 ;  LINH2-MGH2 ;  SORPTION ;  LIH
语种: 英语
WOS记录号: WOS:000340427600066
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145409
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.Dalian Univ Technol, Carbon Res Lab, Liaoning Key Lab Energy Mat & Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Cao, Hujun,Wang, Han,He, Teng,et al. Improved kinetics of the Mg(NH2)(2)-2LiH system by addition of lithium halides[J]. RSC ADVANCES,2014,4(61):32555-32561.
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