کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1621526 | 1516396 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synchrotron XRD and XANES studies of cerium-doped NaAlH4: Elucidation of doping induced structure changes and electronic state
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synchrotron XRD and XANES studies of cerium-doped NaAlH4: Elucidation of doping induced structure changes and electronic state Synchrotron XRD and XANES studies of cerium-doped NaAlH4: Elucidation of doping induced structure changes and electronic state](/preview/png/1621526.png)
چکیده انگلیسی
NaAlH4 samples doped with Ce additives, at various stages in a hydrogenation process, are investigated using synchrotron X-ray diffraction (XRD) and X-ray absorption near edge structure (XANES) spectroscopy. The presence of Ce–Al alloy regions are detected in the ball-milling samples, and no evidence of changes in the unit-cell dimensions of NaAlH4 are seen between ball-milling and hydrogenation samples. The XANES spectra of the samples are measured at the L-3 edge of the cerium, and by comparing the spectra of the dopants with those of the pure oxides, we find that a valency change of the oxidated states of cerium from Ce4+ to Ce3+.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 481, Issues 1–2, 29 July 2009, Pages 60–64
Journal: Journal of Alloys and Compounds - Volume 481, Issues 1–2, 29 July 2009, Pages 60–64
نویسندگان
Chubin Wan, Xin Ju, Ying Qi, Yimeng Zhang, Shumao Wang, Xiaopeng Liu, Lijun Jiang,