Pressure and Temperature Influence on the Desorption Pathway of the LiBH4-MgH2 Composite System

被引：129
作者：
Boesenberg, Ulrike [1 ]
Ravnsbaek, Dorthe B. [2 ,3 ]
Hagemann, Hans [4 ]
D'Anna, Vincenza [4 ]
Minella, Christian Bonatto [1 ]
Pistidda, Claudio [1 ]
van Beek, Wouter [5 ]
Jensen, Torben R. [2 ,3 ]
Bormann, Ruediger [1 ]
Dornheim, Martin [1 ]
机构：
[1] GKSS Forschungszentrum Geesthacht GmbH, Inst Mat Res, D-21502 Geesthacht, Germany
[2] Univ Aarhus, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus, Denmark
[3] Univ Aarhus, Dept Chem, DK-8000 Aarhus, Denmark
[4] Univ Geneva, Dept Chim Phys, CH-1211 Geneva 4, Switzerland
[5] Swiss Norwegian Beamlines ESRF, F-38043 Grenoble, France
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 35期
基金：
瑞士国家科学基金会;
关键词：
REACTIVE HYDRIDE COMPOSITES; HYDROGEN STORAGE-SYSTEM; MAGNESIUM BOROHYDRIDE; CYCLING BEHAVIOR; MG; ALLOYS; STOICHIOMETRY; DIFFRACTION; KINETICS; NICKEL;
D O I：
10.1021/jp104814u
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：
The decomposition pathway in LiBH4-MgH2 reactive hydride composites was investigated systematically as a function of pressure and temperature. Individual decomposition of MgH2 and LiBH4 is observed at higher temperatures and low pressures (T >= 450 degrees C and p(H-2) <= 3 bar), whereas simultaneous desorption of H-2 from LiBH4 and formation of MgB2 was observed at 400 degrees C and a hydrogen backpressure of p(H-2) = 5 bar. The simultaneous desorption of H-2 from LiBH4 and MgH2 without intermediate formation of metallic Mg could not be observed. In situ X-ray diffraction (XRD) and infrared (IR) spectroscopy reveal the present crystalline and amorphous phases.
引用
收藏
页码：15212 / 15217
页数：6
相关论文
共 36 条
[1]   Unexpected kinetic effect of MgB2 in reactive hydride composites containing complex borohydrides [J].
Barkhordarian, Gagik ;
Klassen, Thomas ;
Dornheim, Martin ;
Bormann, Ruediger .
JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 440 (1-2) :L18-L21
[2]   Role of additives in LiBH4-MgH2 reactive hydride composites for sorption kinetics [J].
Boesenberg, U. ;
Kim, J. W. ;
Gosslar, D. ;
Eigen, N. ;
Jensen, T. R. ;
von Colbe, J. M. Bellosta ;
Zhou, Y. ;
Dahms, M. ;
Kim, D. H. ;
Guenther, R. ;
Cho, Y. W. ;
Oh, K. H. ;
Klassen, T. ;
Bormann, R. ;
Dornheim, M. .
ACTA MATERIALIA, 2010, 58 (09) :3381-3389
[3]   On the chemical state and distribution of Zr- and V-based additives in reactive hydride composites [J].
Boesenberg, U. ;
Vainio, U. ;
Pranzas, P. K. ;
von Colbe, J. M. Bellosta ;
Goerigk, G. ;
Welter, E. ;
Dornheim, M. ;
Schreyer, A. ;
Bormann, R. .
NANOTECHNOLOGY, 2009, 20 (20)
[4]   Hydrogen sorption properties of MgH2-LiBH4 composites [J].
Boesenberg, Ulrike ;
Doppiu, Stefania ;
Mosegaard, Lene ;
Barkhordarian, Gagik ;
Eigen, Nico ;
Borgschulte, Andreas ;
Jensen, Torbert R. ;
Cerenius, Yngve ;
Gutfleisch, Oliver ;
Klassen, Thomas ;
Dornheim, Martin ;
Bormann, Ruediger .
ACTA MATERIALIA, 2007, 55 (11) :3951-3958
[5]   The crystallography beamline I711 at MAX II [J].
Cerenius, Y ;
Ståhl, K ;
Svensson, LA ;
Ursby, T ;
Oskarsson, Å ;
Albertsson, J ;
Liljas, A .
JOURNAL OF SYNCHROTRON RADIATION, 2000, 7 (07) :203-208
[6]   Magnesium borohydride: Synthesis and crystal structure [J].
Cerny, Radovan ;
Filinchuk, Yaroslav ;
Hagemann, Hans ;
Yvon, Klaus .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2007, 46 (30) :5765-5767
[7]   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
[8]   Thermal destabilization of binary and complex metal hydrides by chemical reaction: A thermodynamic analysis [J].
Cho, YW ;
Shim, JH ;
Lee, BJ .
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2006, 30 (01) :65-69
[9]  
Dornheim M, 2010, HDB HYDROGEN STORAGE
[10]   Insight into Mg(BH4)2 with Synchrotron X-ray Diffraction: Structure Revision, Crystal Chemistry, and Anomalous Thermal Expansion [J].
Filinchuk, Yaroslav ;
Cerny, Radovan ;
Hagemann, Hans .
CHEMISTRY OF MATERIALS, 2009, 21 (05) :925-933
1234