Hydride formation in ball-milled and cryomilled Mg-Fe powder mixtures

被引：32

作者：

Riktor, Marit D. ^{[1
]}

Deledda, Stefano ^{[1
]}

Herrich, Monika ^{[2
]}

Gutfleisch, Oliver ^{[2
]}

Fjellvag, Helmer ^{[3
]}

Hauback, Bjorn C. ^{[1
]}

机构：

[1] Inst Energy Technol, Dept Phys, NO-2027 Kjeller, Norway

[2] IFW Dresden, Inst Met Mat, D-01171 Dresden, Germany

[3] Univ Oslo, Dept Chem, NO-0318 Oslo, Norway

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2009年 / 158卷 / 1-3期

关键词：

Hydrogen storage; Mg-based hydrides; Ball milling; Cryomilling; MAGNESIUM-HYDROGEN SYSTEM; H SYSTEM; STORAGE; MG2FEH6; KINETICS; MG2COH5; ANIONS; TI;

D O I：

10.1016/j.mseb.2008.12.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the formation of the ternary hydride Mg2FeH6 in mechanically activated powders. Powder mixtures with nominal composition Mg67Fe33 were ball-milled in an inert At atmosphere either at room temperature or at liquid nitrogen temperature (cryomilling), and subsequently hydrogenated at different pressures at 622 K in a Sieverts-type apparatus. X-ray diffraction data from the hydrided products show Mg2FeH6 is formed directly from 2Mg+Fe+3H(2). Cryomilling improves the hydrogen absorption kinetics, but also results in a decrease of the total yield of Mg2FeH6. This is likely due to MgH2 being kinetically favoured, and in turn acting as a competitor to the formation of the ternary hydride. The absorption data is discussed in the framework of the Johnson-Mehl-Avrami model, which suggests the formation of Mg2FeH6 occurs via interface-controlled growth processes. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：19 / 25

页数：7

共 28 条

[1] Kinetics of phase change I - General theory [J].

Avrami, M .

JOURNAL OF CHEMICAL PHYSICS, 1939, 7 (12) :1103-1112

[2] One-step direct synthesis of a Ti-doped sodium alanate hydrogen storage material [J].

Bellosta von Colbe, JM ;

Felderhoff, M ;

Bogdanovic, B ;

Schüth, F ;

Weidenthaler, C .

CHEMICAL COMMUNICATIONS, 2005, (37) :4732-4734

[3] Thermodynamics and dynamics of the Mg-Fe-H system and its potential for thermochemical thermal energy storage [J].

Bogdanovic, B ;

Reiser, A ;

Schlichte, K ;

Spliethoff, B ;

Tesche, B .

JOURNAL OF ALLOYS AND COMPOUNDS, 2002, 345 (1-2) :77-89

[4] Thermodynamic investigation of the magnesium-hydrogen system [J].

Bogdanovic, B ;

Bohmhammel, K ;

Christ, B ;

Reiser, A ;

Schlichte, K ;

Vehlen, R ;

Wolf, U .

JOURNAL OF ALLOYS AND COMPOUNDS, 1999, 282 (1-2) :84-92

[5] Mg3MnH7, containing the first known hexahydridomanganese(I) complex [J].

Bortz, M ;

Bertheville, B ;

Yvon, K ;

Movlaev, EA ;

Verbetsky, VN ;

Fauth, F .

JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 279 (02) :L8-L10

[6] Mechanochemical synthesis and crystal structure of α′-AlD3 and α-AlD3 [J].

Brinks, Hendrik W. ;

Istad-Lem, Andreas ;

Hauback, Bjlrn C. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (51) :25833-25837

[7]

BURKE J, 1956, KINETICS PHASE TRANS, P184

[8] Synthesis and characterization of nanocrystalline Mg2CoH5 obtained by mechanical alloying [J].

Chen, J ;

Takeshita, HT ;

Chartouni, D ;

Kuriyama, N ;

Sakai, T .

JOURNAL OF MATERIALS SCIENCE, 2001, 36 (24) :5829-5834

[9] DIMAGNESIUM IRON(II) HYDRIDE, MG2FEH6, CONTAINING OCTAHEDRAL FEH64- ANIONS [J].

DIDISHEIM, JJ ;

ZOLLIKER, P ;

YVON, K ;

FISCHER, P ;

SCHEFER, J ;

GUBELMANN, M ;

WILLIAMS, AF .

INORGANIC CHEMISTRY, 1984, 23 (13) :1953-1957

[10] Formation, composition and stability of Mg-Co compounds [J].

Gennari, FC ;

Castro, FJ .

JOURNAL OF ALLOYS AND COMPOUNDS, 2005, 396 (1-2) :182-192

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