Hydrogen desorption behaviors of γ-AlH3: Diverse decomposition mechanisms for the outer layer and the inner part of γ-AlH3 particle

被引：24

作者：

Gao, Shichao ^{[1
,3
]}

Liu, Haizhen ^{[1
,2
]}

Wang, Xinhua ^{[1
,3
]}

Xu, Li ^{[2
]}

Liu, Shuangyu ^{[2
]}

Sheng, Peng ^{[2
]}

Zhao, Guangyao ^{[2
]}

Wang, Bo ^{[2
]}

Li, Hui ^{[2
]}

Yan, Mi ^{[1
,3
]}

机构：

[1] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

[2] Global Energy Interconnect Res Inst, State Key Lab Adv Transmiss Technol, Beijing 102209, Peoples R China

[3] Zhejiang Univ, Key Lab Novel Mat Informat Technol Zhejiang Prov, Hangzhou 310027, Zhejiang, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 40期

基金：

中国国家自然科学基金;

关键词：

Hydrogen storage; Aluminium hydride; Titanium fluoride; Decomposition mechanism; CRYSTAL-STRUCTURE; ALUMINUM-HYDRIDE; MECHANOCHEMICAL SYNTHESIS; DEHYDRIDING PROPERTIES; ALH3; KINETICS; ALPHA; ALANE; THERMODYNAMICS; SOLVENT;

D O I：

10.1016/j.ijhydene.2017.08.074

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：

Aluminium hydride (AlH3) is a promising hydrogen storage material because it possesses a high theoretical hydrogen capacity of 10.01 wt%. However, the stability and decomposition mechanism of some AlH3 polymorphs (e.g., gamma-AlH3) still remain unclear. In this work, the hydrogen desorption behaviours of gamma-AlH3 with or without TiF3 addition were investigated by hydrogen desorption measurement and thermal analysis. It was revealed that the decompositions of the outer layer and the inner part of gamma-AlH3 particle follow diverse decomposition mechanisms. The outer layer of gamma-AlH3 particle tends to decompose directly, while the inner part of gamma-AlH3 particle prefers to first transform to more stable alpha-AlH3 and then decompose. TiF3 addition significantly lowers the temperature for the direct decomposition of outer layer gamma-AlH3 by about 30 degrees C but scarcely impacts the decomposition of inner part gamma-AlH3, which further confirms the decomposition mechanism of gamma-AlH3. It was suggested that the particle size plays an important role in the thermal stability of gamma-AlH3. The results of this work will help understanding the decomposition mechanisms of other AlH3 polymorphs for hydrogen storage. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：25310 / 25315

页数：6

共 47 条

[31] Advances in the electrochemical regeneration of aluminum hydride [J].

Martinez-Rodriguez, Michael J. ;

Garcia-Diaz, Brenda L. ;

Teprovich, Joseph A., Jr. ;

Knight, Douglas A. ;

Zidan, Ragaiy .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2012, 106 (03) :545-550

[32] Ab initio study of boron and aluminum hydrides nanoparticles [J].

Michos, F. I. ;

Sgouros, A. P. ;

Sigalas, M. M. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2016, 41 (44) :20210-20216

[33] Parametrization of a reactive force field for aluminum hydride [J].

Ojwang, J. G. O. ;

van Santen, Rutger A. ;

Kramer, Gert Jan ;

van Duin, Adri C. T. ;

Goddard, William A., III .

JOURNAL OF CHEMICAL PHYSICS, 2009, 131 (04)

[34] Intrinsic and mechanically modified thermal stabilities of α-, β- and γ-aluminum trihydrides AlH3 [J].

Orimo, S ;

Nakamori, Y ;

Kato, T ;

Brown, C ;

Jensen, CM .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2006, 83 (01) :5-8

[35] Formation and decomposition of AlH3 in the aluminum-hydrogen system [J].

Saitoh, H. ;

Machida, A. ;

Katayama, Y. ;

Aoki, K. .

APPLIED PHYSICS LETTERS, 2008, 93 (15)

[36] Hydrogenation of passivated aluminum with hydrogen fluid [J].

Saitoh, H. ;

Machida, A. ;

Katayama, Y. ;

Aoki, K. .

APPLIED PHYSICS LETTERS, 2009, 94 (15)

[37] Accelerated thermal decomposition of AlH3 for hydrogen-fueled vehicles [J].

Sandrock, G ;

Reilly, J ;

Graetz, J ;

Zhou, WM ;

Johnson, J ;

Wegrzyn, J .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2005, 80 (04) :687-690

[38] Cubic metallic phase of aluminum hydride showing improved hydrogen desorption [J].

Scheicher, R. H. ;

Kim, D. Y. ;

Lebegue, S. ;

Arnaud, B. ;

Alouani, M. ;

Ahuja, R. .

APPLIED PHYSICS LETTERS, 2008, 92 (20)

[39] Spatially resolved hydrogen desorption from aluminum hydride observed by magnetic resonance imaging [J].

Setthanan, Uncharat ;

MacMillan, Bryce ;

McGrady, G. Sean .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2009, 34 (19) :8067-8072

[40] A non-volatile, polymer aluminium hydrogen (AlH3)(x) and several volatile compounds of monomeric AlH3. [J].

Stecher, O ;

Wiberg, E .

BERICHTE DER DEUTSCHEN CHEMISCHEN GESELLSCHAFT, 1942, 75 :2003-2012

← 1 2 3 4 5 →