Preparation and Hydrogen Storage Properties of Mg2CoH5 Nanocrystals with 18-Electrons Structure

被引：0

作者：

Ma Jian-Li ^{[1
]}

Wang Yan ^{[1
]}

Tao Zhan-Liang ^{[1
]}

Chen Jun ^{[1
]}

机构：

[1] Nankai Univ, Key Lab Adv Energy Mat Chem, Minist Educ, Coll Chem, Tianjin 300071, Peoples R China

来源：

CHINESE JOURNAL OF INORGANIC CHEMISTRY | 2012年 / 28卷 / 04期

关键词：

Mg2CoH5; nanocrystals; hydrogen storage property; preparation; mechanical ball-milling method; MG-CO-H; MG2FEH6; BEHAVIOR; HYDRIDES; SYSTEM;

D O I：

暂无

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

This paper reports on the preparation of Mg2CoH5 nanocrystals and their hydrogen storage properties. Mg2CoH5 nanocrystals have been synthesized by mechanical ball-milling the mixture of MgH2 and Co nanoparticles at room temperature under an argon atmosphere. The crystal structure, morphologies, and hydrogen storage properties of the as-prepared Mg2CoH5 nanocrystals are investigated. The results show that the tetragonal Mg2CoH5 nanocrystals (79%) are obtained by a ball-milling method at room temperature. The as-prepared Mg2CoH5 nanocrystals present a spherical shape with a well-proportioned particle size distribution around 80nm. Mg2CoH5 nanocrystals show fast absorption/desorption kinetics. The desorption enthalpy and entropy for Mg2CoH5 are -115.0 kJ.mol(-1) H-2 and -193.6.1 J-mol(-1).K-1 H-2, respectively. At 543 K, the hydrogen-desorbed sample can absorb about 1.5wt% hydrogen in 7 min only.

引用

页码：657 / 661

页数：5

共 18 条

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