Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1621526 | Journal of Alloys and Compounds | 2009 | 5 Pages |
Abstract
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+.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Chubin Wan, Xin Ju, Ying Qi, Yimeng Zhang, Shumao Wang, Xiaopeng Liu, Lijun Jiang,