NH3 Mediated or Ion Migration Reaction: The Case Study on Halide-Amide System

被引：24

作者：

Cao, Hujun ^{[1
,2
,3
]}

Wang, Jianhui ^{[1
]}

Chua, Yongshen ^{[1
]}

Wang, Han ^{[1
,3
]}

Wu, Guotao ^{[1
]}

Xiong, Zhitao ^{[1
]}

Qiu, Jieshan ^{[2
]}

Chen, Ping ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

[2] Dalian Univ Technol, State Key Lab Fine Chem, Liaoning Key Lab Energy Mat & Chem Engn, Carbon Res Lab, Dalian 116024, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 05期

基金：

中国国家自然科学基金; 国家杰出青年科学基金;

关键词：

HYDROGEN STORAGE; LITHIUM AMIDE; MECHANISM; LIH; DEHYDROGENATION; DECOMPOSITION; DIFFUSION; HYDRIDES; IMIDES; LINH2;

D O I：

10.1021/jp411551v

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lively debates on hydrogen desorption from the amide-hydride system via either ion migration or NH3 mediated mechanisms have been ongoing since the discovery of the amide-hydride system for hydrogen storage. In this work, we employed kinetic analyses to demonstrate that the mechanism of hydrogen desorption depends on the sample morphology and desorption conditions. Upon the formation of Li amide bromide (Li2NH2Br), the LiNH2 unit is confined in the cage of Br, resulting in less mobility of ion. Hydrogen desorption from the Li2NH2Br-2LiH system appears to follow the NH3 mediated mechanism even if the two starting chemicals have been intensively ball milled. On the other hand, the migrations of Li+ and H+ play important roles leading to H-2 formation from the direct combination of H+ (from -NH2) and H- (from LiH) when LiNH2 and LiH are intimately in contact.

引用

页码：2344 / 2349

页数：6

共 28 条

[1] Reaction paths between LiNH2 and LiH with effects of nitrides [J].

Aguey-Zinsou, Kondo-Francois ;

Yao, Jinhan ;

Guo, Z. Xiao .

JOURNAL OF PHYSICAL CHEMISTRY B, 2007, 111 (43) :12531-12536

[2] Hydrogen storage and ionic mobility in amide-halide systems [J].

Anderson, Paul A. ;

Chater, Philip A. ;

Hewett, David R. ;

Slater, Peter R. .

FARADAY DISCUSSIONS, 2011, 151 :271-284

[3] LI2BR(NH2) - THE 1ST TERNARY ALKALI-METAL AMIDE HALIDE [J].

BARLAGE, H ;

JACOBS, H .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1994, 620 (03) :479-482

[4] Effects of Al-based additives on the hydrogen storage performance of the Mg(NH2)2-2LiH system [J].

Cao, Hujun ;

Zhang, Yao ;

Wang, Jianhui ;

Xiong, Zhitao ;

Wu, Guotao ;

Qiu, Jieshan ;

Chen, Ping .

DALTON TRANSACTIONS, 2013, 42 (15) :5524-5531

[5] Interaction between lithium amide and lithium hydride [J].

Chen, P ;

Xiong, ZT ;

Luo, JZ ;

Lin, JY ;

Tan, KL .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (39) :10967-10970

[6] Interaction of hydrogen with metal nitrides and imides [J].

Chen, P ;

Xiong, ZT ;

Luo, JZ ;

Lin, JY ;

Tan, KL .

NATURE, 2002, 420 (6913) :302-304

[7] Mechanistic investigations on the heterogeneous solid-state reaction of magnesium amides and lithium hydrides [J].

Chen, Ping ;

Xiong, Zhitao ;

Yang, Lefu ;

Wu, Guotao ;

Luo, Weifang .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (29) :14221-14225

[8] A mechanism for non-stoichiometry in the lithium amide/lithium imide hydrogen storage reaction [J].

David, William I. F. ;

Jones, Martin O. ;

Gregory, Duncan H. ;

Jewell, Catherine M. ;

Johnson, Simon R. ;

Walton, Allan ;

Edwards, Peter P. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (06) :1594-1601

[9]

DIMANOV A, 1995, PHYS CHEM MINER, V22, P437, DOI 10.1007/BF00200321

[10] Thermal decomposition of the non-interstitial hydrides for the storage and production of hydrogen [J].

Grochala, W ;

Edwards, PP .

CHEMICAL REVIEWS, 2004, 104 (03) :1283-1315

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