Microstructure characteristics and hydrolysis mechanism of Mg–Ca alloy hydrides for hydrogen generation
作者： Peipei Liu , Haiwen Wu , Chaoling Wu , Yungui Chen , Yanmin Xu
DOI: 10.1016/J.IJHYDENE.2015.01.105
关键词: Atmospheric temperature range 、 Microstructure 、 Hydrogen 、 Solubility 、 Inorganic chemistry 、 Hydride 、 Hydrogen production 、 Alloy 、 Materials science 、 Hydrolysis
摘要: Abstract The microstructure characteristics and hydrolysis mechanism of Mg–Ca alloy hydrides were investigated in this paper. It was found that x wt.% Ca–Mg alloys (x = 10, 20 30) hydrogenated after ball-milling are mainly composed MgH2 Ca4Mg3H14 phases, they show much better properties than pure at the temperature range 25–70 °C. superior performances may be attributed to an easy nature a high solubility by-product Ca(OH)2, which provides gates make water penetrate deeply inside particles. Moreover, increasing content Ca enhances further due formation more larger specific surface areas as well. best comprehensive obtained by 30 wt.% hydride, releases 1419.8 mL g−1 hydrogen within 1 h 70 °C its conversion yield is about 95%. generation kinetics also it showed activation energies decrease with increase content, accordance their properties.
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