کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5148095 | 1497376 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of impurity N2 concentration on the hydriding kinetics of Na-doped Mg-Ni alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of impurity N2 concentration on the hydriding kinetics of Na-doped Mg-Ni alloys Effect of impurity N2 concentration on the hydriding kinetics of Na-doped Mg-Ni alloys](/preview/png/5148095.png)
چکیده انگلیسی
Here, we report on the hydriding behaviour of various Mg-Ni alloys in the presence of N2 gaseous impurities using in situ synchrotron XRD. We find that a N2 content as low as 0.5Â mol.% can completely inhibit the hydriding of pure Mg2Ni whereas the Na-modified equivalent remains relatively unaffected even at N2 concentrations of up to 5Â mol.%. The activated hypoeutectic Mg-Ni alloy demonstrates excellent hydriding kinetics compared to the as-cast counterpart under 1Â mol.% of N2. Surface analysis shows it is the electropositive nature of a Na-modified Mg-Ni surface that facilitates selective adsorption of N2 while leaving metallic Ni available for H2 adsorption/dissociation. The results are important in designing Mg-Ni alloys with tailored properties that are suitable for use in hydrogen storage/purification/separation applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 1, 5 January 2017, Pages 366-375
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 1, 5 January 2017, Pages 366-375
نویسندگان
Xuan Quy Tran, Stuart D. McDonald, Qinfen Gu, Xin Fu Tan, Kazuhiro Nogita,