Structure and hydrogen storage properties of MgH2 catalysed with La2O3

被引：51

作者：

Gupta, R. ^{[1
]}

Agresti, F. ^{[2
]}

Lo Russo, S. ^{[3
]}

Maddalena, A. ^{[2
]}

Palade, P. ^{[2
,4
]}

Principi, G. ^{[2
]}

机构：

[1] Devi Ahilya Univ, Dept Instrumentat, Indore 452001, India

[2] Dipartimento Ingn Meccan, Settore Mat & CNISM, I-35131 Padua, Italy

[3] Univ Padua, Dipartimento Fis, CNISM, I-35131 Padua, Italy

[4] Natl Inst Mat Phys, Bucharest 077125, Romania

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 450卷 / 1-2期

关键词：

hydrogen storage materials; high-energy ball milling; X-ray diffraction; hydrogen absorption; hydrogen desorption; BEHAVIOR; SORPTION; NB2O5;

D O I：

10.1016/j.jallcom.2006.10.105

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 catalytic effect of the addition of lanthanum oxide (La2O3), in the range 0.5-2.0 mol%, on the hydrogen storage properties of MgH2 prepared by ball milling has been studied. The addition of La2O3 reduces the formation during milling of the metastable orthorhombic gamma-MgH2 phase. The desorption rate of samples with 1 and 2 mol% La2O3 comes out to be about 0.010 wt% per second at 573 K under an hydrogen pressure of 0.3 bar, better than for sample with 0.5 mol% La2O3. The presence of LaH3 after hydrogenation/dehydrogenation cycles has been observed in all samples. The sample with 1 mol% of La2O3 gives a lower hysteresis factor compared with sample with 2 mol%. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：310 / 313

页数：4

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