کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1526816 | 995375 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structures and hydrogen storage properties of Mg95Ni5 composite prepared by hydriding combustion synthesis and mechanical milling Structures and hydrogen storage properties of Mg95Ni5 composite prepared by hydriding combustion synthesis and mechanical milling](/preview/png/1526816.png)
This paper investigated the effect of the intermediate reaction, Mg + H2 → MgH2 in hydriding combustion synthesis (HCS) process on the structures and hydrogen storage properties of Mg95Ni5 prepared by HCS and subsequent mechanical milling (MM), i.e. HCS + MM. When the MgH2 content in the HCS product was increased from 53 wt.% to 81 wt.%, the hydrogen absorption capacity of our HCS + MM product at 373 K within 100 s was increased from 0.63 wt.% to 4.90 wt.%, and the decomposition temperature onset was decreased approximately from 470 K to 450 K. The improvement in hydrogen storage properties was discussed with respect to the different structures resulted from the different HCS processes by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. Moreover, the HCS product (with 81 wt.% MgH2) milled with 3 wt.% graphite absorbed 5.56 wt.% hydrogen at 373 K in 100 s. The investigation in this study suggested that HCS combined with MM was potential in the preparation of Mg-based materials with excellent hydriding and dehydriding properties.
Journal: Materials Chemistry and Physics - Volume 112, Issue 1, 15 November 2008, Pages 218–222