Improving hydrogen storage performance of NaAlH4 by novel two-step milling method
文献类型：期刊论文
| 作者 | X. D. Kang ; P. Wang ; H. M. Cheng |
| 刊名 | Journal of Physical Chemistry C
 |
| 出版日期 | 2007 |
| 卷号 | 111期号:12页码:4879-4884 |
| 关键词 | sodium aluminum-hydride ti-doped naalh4 reversible dehydrogenation titanium alanate powder al |
| ISSN号 | 1932-7447 |
| 中文摘要 | A selective two-step doping method was developed to prepare metallic Ti-doped NaAlH4, in which a catalytic amount of metallic Ti was first milled with NaH and then milled again after adding Al powder (NaH:Al=1:1). As determined by the combined X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) examinations, the utilization of this novel doping method has produced a more homogeneous dispersion of the fine Ti hydride particles in the NaH/Al matrix, compared to the sample prepared by the traditional one-step milling. As a result, both the hydrogen capacity and de-/hydriding kinetics of the doped materials have been markedly improved. For the NaH + Al + 0.04Ti mixture mechanically milled for 20 h, the cycling hydrogen capacity of the two-step milled sample reached to over 4.3 wt %, about 40% higher than the sample prepared by the traditional one-step method. Moreover, it was observed that the cycling performance of the doped material was highly stable over several hydriding/dehydriding cycles. On the basis of these results, a discussion regarding the nature of catalytically active species was given. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/33615]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | X. D. Kang,P. Wang,H. M. Cheng. Improving hydrogen storage performance of NaAlH4 by novel two-step milling method[J]. Journal of Physical Chemistry C,2007,111(12):4879-4884. |
| APA | X. D. Kang,P. Wang,&H. M. Cheng.(2007).Improving hydrogen storage performance of NaAlH4 by novel two-step milling method.Journal of Physical Chemistry C,111(12),4879-4884. |
| MLA | X. D. Kang,et al."Improving hydrogen storage performance of NaAlH4 by novel two-step milling method".Journal of Physical Chemistry C 111.12(2007):4879-4884. |
入库方式： OAI收割
来源：金属研究所
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