Effect of the nanocatalysts on the thermal stability and hydrogenation/dehydrogenation kinetics of MgH2 nanocrystalline powders

被引：7
作者：
El-Eskandarany, M. Sherif [1 ]
AlMatrouk, H. S. [1 ]
Shaban, Ehab [1 ]
Al-Duweesh, Ahmed [1 ]
机构：
[1] Kuwait Inst Sci Res, Nanotechnol & Adv Mat Program, Energy & Bldg Res Ctr, Safat 13109, Kuwait
来源：
MATERIALS TODAY-PROCEEDINGS | 2016年 / 3卷 / 08期
关键词：
Reactive ball milling: metal hydrides; nanocomposites; nanocatalysts; gas-solid reaction; cycle-life-time;
D O I：
10.1016/j.matpr.2016.06.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanocrystalline MgH2 powders were synthesized by reactive ball milling of Mg powders under high hydrogen gas pressure. A single stable phase of beta MgH2 coexisted with gamma-MgH2 were obtained after 25 h of the milling time. Increasing the ball milling time led to a significant decreasing on the grain size of MgH2 powders and this led to improve the hydrogenation/dehydrogenation properties of the metal hydride phase. The effect of catalytic additives (5 wt.%) of TM (Ni, and Cu), MO (Fe2O3, SiO2 and ZnO) and TiMn alloy on the absorption/desorption kinetics of MgH2 nanocrystalline powders were investigated and found to be destabilizer additives of the MgH2 phase. (C) 2016 Published by Elsevier Ltd. Selection and Peer-review under responsibility of the Conference Committee of 6th International Conference on Advanced Nanomaterials (ANM2015) (C) 2015 ANM2015. All rights reserved.
引用
收藏
页码：2608 / 2616
页数：9
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