Ternary amide-hydride system: A study on LiAl(NH2)(4)-LiAlH4 interaction

doi:10.1016/j.jallcom.2019.03.234

	Ternary amide-hydride system: A study on LiAl(NH2)(4)-LiAlH4 interaction
	Chua, Yong Shen 1; Wu, Guotao 2; Chen, Ping 2; Xiong, Zhitao 2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2019-06-25
卷号	790 页码:597-601
关键词	Amide-hydride interaction Dehydrogenation Ion migration mechanism NH3 mediation mechanism Hydrogen storage
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2019.03.234
通讯作者	Chua, Yong Shen(yschua@usm.my) ; Xiong, Zhitao()
英文摘要	LiAl(NH2)(4) is a ternary amide that readily decomposes to release ammonia at temperatures as low as similar to 90 degrees C. Owing to such instability as compared to binary amides, we hypothesize that the dehydrogenation mechanism involving ternary amide-hydride interaction would be significantly different from those of binary metal amide-hydride interaction. Therefore, in this study, interaction of LiAl(NH2)(4) and LiAlH4 has been investigated by means of mechanical milling and thermal method. It was found that dehydrogenation occurred spontaneously during the milling process and the rate of dehydrogenation increased with increasing amount of LiAlH4, suggesting an ion migration mediated dehydrogenation. As reaction progressed, the formation of Li3AlH6 as an intermediate was detected and a total of 8 equiv. of H-2 (7.5 wt%) can be released, forming LiH and AlN as the final product. In contrast, heating the homogenously ground LiAl(NH2)(4) and LiAlH4 sample resulted in the release of NH3 at low temperatures, indicating that NH3 mediation would take place in case of dehydrogenation. Further increase in temperature resulted in a rapid release of hydrogen from the interaction of the LiAl(NH)(2) and LiAlH4. It was also found that hydride with higher basicity is required to trigger amide-hydride interaction for dehydrogenation at low temperatures. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	USM Short Term Grant[304/PKIMIA/6313210] ; Project of National Science Funds for Distinguish Young Scholars[51801197] ; Sino-Japanese Research Cooperative Program of Ministry of Science and Technology[2016YFE0118300]
WOS关键词	HYDROGEN STORAGE ; CHEMICAL-REACTION ; LIH ; DECOMPOSITION ; BOROHYDRIDE ; TRANSITION ; LIALH4 ; NA
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000464663600068
资助机构	USM Short Term Grant ; USM Short Term Grant ; Project of National Science Funds for Distinguish Young Scholars ; Project of National Science Funds for Distinguish Young Scholars ; Sino-Japanese Research Cooperative Program of Ministry of Science and Technology ; Sino-Japanese Research Cooperative Program of Ministry of Science and Technology ; USM Short Term Grant ; USM Short Term Grant ; Project of National Science Funds for Distinguish Young Scholars ; Project of National Science Funds for Distinguish Young Scholars ; Sino-Japanese Research Cooperative Program of Ministry of Science and Technology ; Sino-Japanese Research Cooperative Program of Ministry of Science and Technology ; USM Short Term Grant ; USM Short Term Grant ; Project of National Science Funds for Distinguish Young Scholars ; Project of National Science Funds for Distinguish Young Scholars ; Sino-Japanese Research Cooperative Program of Ministry of Science and Technology ; Sino-Japanese Research Cooperative Program of Ministry of Science and Technology ; USM Short Term Grant ; USM Short Term Grant ; Project of National Science Funds for Distinguish Young Scholars ; Project of National Science Funds for Distinguish Young Scholars ; Sino-Japanese Research Cooperative Program of Ministry of Science and Technology ; Sino-Japanese Research Cooperative Program of Ministry of Science and Technology
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165602]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Chua, Yong Shen; Xiong, Zhitao
作者单位	1.Univ Sains Malaysia, Sch Chem Sci, Usm 11800, Pulau Pinang, Malaysia 2.Chinese Acad Sci, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Chua, Yong Shen,Wu, Guotao,Chen, Ping,et al. Ternary amide-hydride system: A study on LiAl(NH2)(4)-LiAlH4 interaction[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,790:597-601.
APA	Chua, Yong Shen,Wu, Guotao,Chen, Ping,&Xiong, Zhitao.(2019).Ternary amide-hydride system: A study on LiAl(NH2)(4)-LiAlH4 interaction.JOURNAL OF ALLOYS AND COMPOUNDS,790,597-601.
MLA	Chua, Yong Shen,et al."Ternary amide-hydride system: A study on LiAl(NH2)(4)-LiAlH4 interaction".JOURNAL OF ALLOYS AND COMPOUNDS 790(2019):597-601.