Enhanced Hydrogen Storage Properties of Li-Mg-N-H System Prepared by Reacting Mg(NH(2))(2) with Li(3)N

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	Enhanced Hydrogen Storage Properties of Li-Mg-N-H System Prepared by Reacting Mg(NH(2))(2) with Li(3)N
	L. P. Ma; H. B. Dai; Z. Z. Fang; X. D. Kang; Y. Liang; P. J. Wang; P. Wang; H. M. Cheng
	2009
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	113 期号:22 页码:9944-9949
摘要	The Li-Mg-N-H system was prepared by reacting magnesium amide [Mg(NH(2))(2)] with lithium nitride (Li(3)N) and investigated with regard to the hydrogen storage properties. Our study shows that the present method is superior to the conventional route in enhancing the reversible dehydrogenation properties. Through optimizing the Li(3)N:Mg(NH(2))(2) ratio in the starting materials, the reversible capacity of U-Mg-N-H system increases to 4.9 wt %, 18% higher than that typically obtained from the Mg(NH(2))(2) + 2LiH mixture at 200 degrees C. Furthermore, increasing the Li(3)N:Mg(NH(2))(2) ratio is effective for mitigating the ammonia release from thus-prepared samples. Combined property/structure investigations indicate that the obtained enhancements should be ascribed to the effects of LiNH(2) and LiH that were in situ generated from the excess Li(3)N. LiNH(2) may promote the dehydrogenation reaction via seeding the reaction intermediate. The concurrently generated LiH acts as an effective ammonia trapping agent. These findings highlight the potential of "intermediate seeding" as a strategy to enhance the reversible hydrogen storage properties of metal-N-H systems.
部门归属	[ma, lai-peng; dai, hong-bin; fang, zhan-zhao; kang, xiang-dong; liang, yan; wang, pei-jun; wang, ping; cheng, hui-ming] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;wang, p (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;pingwang@imr.ac.cn
关键词	Complex Hydrides Ultrafast Reaction Amide Improvement Desorption Linh2 Destabilization Mechanism Mixtures Imides
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32180
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. P. Ma,H. B. Dai,Z. Z. Fang,et al. Enhanced Hydrogen Storage Properties of Li-Mg-N-H System Prepared by Reacting Mg(NH(2))(2) with Li(3)N[J]. Journal of Physical Chemistry C,2009,113(22):9944-9949.
APA	L. P. Ma.,H. B. Dai.,Z. Z. Fang.,X. D. Kang.,Y. Liang.,...&H. M. Cheng.(2009).Enhanced Hydrogen Storage Properties of Li-Mg-N-H System Prepared by Reacting Mg(NH(2))(2) with Li(3)N.Journal of Physical Chemistry C,113(22),9944-9949.
MLA	L. P. Ma,et al."Enhanced Hydrogen Storage Properties of Li-Mg-N-H System Prepared by Reacting Mg(NH(2))(2) with Li(3)N".Journal of Physical Chemistry C 113.22(2009):9944-9949.