The interaction of hydrogen with oxidic promoters of hydrogen storage in magnesium hydride

被引：16
|
作者：
Dolci, Francesco
Di Chio, Marco
Baricco, Marcello
Giamello, Elio [1 ]
机构：
[1] Univ Turin, Dipartimento Chim, IFM, I-10125 Turin, Italy
来源：
MATERIALS RESEARCH BULLETIN | 2009年 / 44卷 / 01期
关键词：
Oxides; Catalytic properties; SORPTION PROPERTIES; NIOBIUM PENTOXIDE; H-SORPTION; MGH2; NB2O5; IMPROVEMENT; MIXTURES; KINETICS; NANOPARTICLES; REFINEMENT;
D O I：
10.1016/j.materresbull.2008.03.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work is devoted to monitor the reactivity with hydrogen of various oxide systems (Nb2O5, WO3 and a mixed Mg/Nb/O oxide) in the aim of understanding the role of oxides as promoters for hydrogen storage in MgH2. The reactivity of the oxides has been tested using either molecular hydrogen or "nascent" hydrogen produced by reaction of zinc with hydrochloric acid. Thermal desorption-mass spectrometry experiments indicate that hydrogen adsorbed in Nb2O5 and Mg/Nb/O mixed oxides is, in part, reversibly released and, for a second fraction, released as water. By contrast. water is the only product desorbed by WO3 after contact with hydrogen. This could explain the higher performances of Nb2O5 as kinetic promoter of hydrogen storage in comparison with WO3. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：194 / 197
页数：4
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