An investigation of the H2 uptake in Mg-Nb-O ternary phases

被引：13

作者：

Dolci, F. ^{[1
]}

Baricco, M. ^{[1
]}

Edwards, P. P.

Giamello, E. ^{[1
]}

机构：

[1] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2008年 / 33卷 / 12期

关键词：

MgH2/Nb2O5; Mg3Nb6O11; hydrogen bronze; mass spectroscopy;

D O I：

10.1016/j.ijhydene.2008.01.034

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：

Various Mg/Nb/O mixed phases have been prepared by solid state reaction in order to mimic similar compounds formed in the ball milled system composed of MgH2 and Nb2O5. The latter oxide has a role as a promoter of the hydrogen uptake and desorption in the Mg/MgH2 system for hydrogen storage. One mixed phase in particular (Mg3Nb6O11) have shown a reversible uptake of molecular hydrogen, confirmed by thermal desorption experiments followed by mass spectroscopy. Comparison of the behaviour of this phase with NbO shows, how a reversible interaction with hydrogen may be linked to the presence of octahedral niobium clusters in both oxides. (c) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：3085 / 3090

页数：6

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