Structural investigation and hydrogen storage capacity of LaMg2Ni9 and (La0.65Ca0.35)(Mg1.32Ca0.68)Ni9 of the AB2C9 type structure

被引：271

作者：

Kadir, K ^{[1
]}

Sakai, T ^{[1
]}

Uehara, I ^{[1
]}

机构：

[1] Osaka Natl Res Inst, Dept Energy & Environm, Ikeda, Osaka 5638577, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 302卷 / 1-2期

关键词：

hydrogen storage alloy; X-ray diffraction; pressure-composition isotherms; crystal structure;

D O I：

10.1016/S0925-8388(00)00581-8

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：

A new quaternary magnesium based alloy (La0.65Ca0.35)(Mg1.32Ca0.68)Ni-9 and its hydride have been synthesized and their crystal structures were determined by Guinier-Hagg X-ray powder diffraction. The compound has a hexagonal structure and is isostructural with LaMg2Ni9 (AB(2)C(9) type), in which Ca partially occupies both A and B sites. The hydrogen absorption/desorption properties were determined by pressure-composition isotherms and compared with LaMg2Ni9. (La0.65Ca0.35)(Mg1.32Ca0.68)Ni-9 absorbs similar to 1.87 wt.% H-2 at similar to 3.3 MPa H-2 and 283 K. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：112 / 117

页数：6

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