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Improved kinetics of the Mg(NH2)(2)-2LiH system by addition of lithium halides
Cao, Hujun1,2; Wang, Han2; He, Teng2; Wu, Guotao2; Xiong, Zhitao2; Qiu, Jieshan1; Chen, Ping2,3
刊名RSC ADVANCES
2014
DOI10.1039/c4ra02864c
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
关键词[WOS]MG-N-H ; HYDROGEN STORAGE PROPERTIES ; ADVANCED REACTOR CONCEPT ; AMIDE-HALIDE ; DESORPTION ; LIBH4 ; LINH2-MGH2 ; SORPTION ; LIH
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.
语种英语
WOS记录号WOS:000340427600066
引用统计
被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/145409
专题中国科学院大连化学物理研究所
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
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GB/T 7714
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.
APA Cao, Hujun.,Wang, Han.,He, Teng.,Wu, Guotao.,Xiong, Zhitao.,...&Chen, Ping.(2014).Improved kinetics of the Mg(NH2)(2)-2LiH system by addition of lithium halides.RSC ADVANCES,4(61),32555-32561.
MLA Cao, Hujun,et al."Improved kinetics of the Mg(NH2)(2)-2LiH system by addition of lithium halides".RSC ADVANCES 4.61(2014):32555-32561.
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