Dehydriding and rehydriding properties of yttrium borohydride Y(BH4)3 prepared by liquid-phase synthesis
Dehydriding and rehydriding properties of yttrium borohydride Y(BH4)3 prepared by liquid-phase synthesis
复制标题
DOI：
10.1016/j.ijhydene.2009.05.097
复制
发表时间：
2009-07
影响因子：
7.2
通讯作者：
Yigang Yan;Haiwen Li;Toyoto Sato;N. Umeda;K. Miwa;S. Towata;S. Orimo
中科院分区：
文献类型：
--
作者：
Yigang Yan;Haiwen Li;Toyoto Sato;N. Umeda;K. Miwa;S. Towata;S. Orimo
采用液相合成法制备了Y（BH 4）3，并通过热重-差热分析（TG-DTA）和X射线衍射（XRD）等测试手段对其放氢和还原性能进行了系统研究。Y（BH 4）3的放氢反应在460 K左右开始，到773 K时，共放出7.8wt%的氢。在474 K和499 K附近观察到Y（BH_4）_3的相变和熔化。DTA和XRD测试结果表明，Y（BH 4）3的分解是通过多步放氢反应进行的，并伴有中间相的形成。此外，还证明了Y（BH_4）_3是部分还原的。
Y(BH4)3was prepared by liquid-phase synthesis, and its dehydriding and rehydriding properties were systematically investigated by performing thermogravimetry and differential thermal analysis (TG-DTA) and powder X-ray diffraction (XRD) measurement. The dehydriding reaction of Y(BH4)3starts at appropriately 460K, and a total of 7.8wt% of hydrogen is released up to 773K. Phase transformation and melting are observed in Y(BH4)3at approximately 474K and 499K, respectively. Both DTA and XRD measurement results indicate that the decomposition of Y(BH4)3proceeds via multistep dehydriding reactions accompanied with the formation of an intermediate phase. Furthermore, Y(BH4)3is proved to be partially rehydrided.