کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1274780 | 1497550 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Hydrogen storage properties of Mg–Ce–Ni nanocomposite induced from amorphous precursor with the highest Mg content Hydrogen storage properties of Mg–Ce–Ni nanocomposite induced from amorphous precursor with the highest Mg content](/preview/png/1274780.png)
The effect of Ce and Ni contents on the glass-forming ability (GFA) of Mg–Ce–Ni system in the Mg-rich corner of Mg–Ce–Ni system is revealed. Ce is more advantageous for the GFA of Mg-rich Mg–Ce–Ni system than Ni, and the lowest Ce content is ∼5 at.% to obtain the fully amorphous alloy. Amorphous alloy with the highest Mg content, Mg90Ce5Ni5, was obtained by melt-spinning. With the amorphous alloy as precursor, nanostructure multi-phases compositae was prepared by crystallizing it in hydrogenation process. The compositae with reversible hydrogen storage capacity of 5.3 wt.% shows much faster kinetics and lower MgH2 desorption activation energy than those of induction-melt Mg90Ce5Ni5 alloy. Both in situ formed nanosized Mg2Ni and CeH2.73 act as effective catalysts and significantly improve the hydrogen storage properties of MgH2.
► The effect of Ce and Ni contents on GFA of Mg-rich Mg–Ce–Ni system is revealed.
► GFR of Mg-rich Mg–Ce–Ni system is pictured for H-storage materials design.
► Mg90Ce5Ni5 owns the highest Mg content in amorphous Mg–Ce–Ni system.
► The mechanism of improved H-storage property of amorphous precursor is explained.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 19, October 2012, Pages 14329–14335