Study of the correlation between the stability of mg-based hydride and the ti-containing agent
Study of the correlation between the stability of mg-based hydride and the ti-containing agent
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毫克基氢化物稳定性与含钛剂相关性研究
DOI：
10.1021/jp0754076
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发表时间：
2007-09
影响因子：
3.7
通讯作者：
Chen, Guorong
中科院分区：
文献类型：
--
作者：
Sun, Lixian;Wei, Shiqiang;Sun, Dalin;Zheng, Shiyou;He, Bo;Fang, Fang;Zhang, Jing;Chen, Guorong
采用x射线衍射、差热分析、热重、傅里叶变换红外光谱和x射线吸收光谱技术研究了TiF3或Ti（OBU”）(4)掺杂前后MgH2和Mg2NiH4的热稳定性和脱氢动力学。与之前的工作不同，氢化物和掺杂剂的混合物在短时间内轻轻研磨，以避免伴随密集或长时间研磨而产生的不良副作用。结果表明，空白MgH2的氢释放起始温度约为420℃，而TiF3-和Ti（OBU”）(4)掺杂MgH2的氢释放起始温度分别降至360℃和410℃。对于Mg2NiH4， TiF3掺杂后温度从230℃降至220℃，而Ti（OBU”）掺杂后温度保持不变(4)。这表明TiF3比Ti（OBU”）(4)更有效地降低了MgH2和Mg2NiH4的稳定性。TiF3掺杂MgH2的脱附动力学得到增强，而TiF3或Ti（OBu”）(4)掺杂Mg2NiH4的脱附动力学没有增强。认为氢化物与含ti试剂之间的相互作用削弱了Mg(Ni)-H键，从而有利于氢原子向氢分子的重组。这些相互作用实质上受到氢化物和含钛剂的影响。
The thermal stability and hydrogen desorption kinetics for MgH2 and Mg2NiH4 before and after doping with TiF3 or Ti(OBU")(4) were studied by X-ray diffraction, differential thermal analysis, thermogravimetry, Fourier transform infrared spectroscopy, and X-ray absorption spectroscopy techniques. Unlike the previous work, the mixture of the hydrides and the dopants was gently ground for a short time to avoid the undesirable side effects accompanied by an intensive or prolonged grinding. It is shown that the onset temperature for hydrogen release is around 420 degrees C for the blank MgH2, but decreases to 360 and 410 degrees C for the TiF3- and the Ti(OBU")(4)-doped MgH2, respectively. For Mg2NiH4, it is reduced from 230 to 220 degrees C after doping with TiF3 but remains unchanged once doping with Ti(OBU")(4). These indicate that TiF3 is more efficient than Ti(OBU")(4) in reducing the stability of MgH2 and Mg2NiH4. The enhanced desorption kinetics is attained in the TiF3-doped MgH2, but not in the TiF3- or Ti(OBu")(4)-doped Mg2NiH4. It is believed that the interactions between the hydrides and the Ti-containing agents weaken the Mg(Ni)-H bonds and thus favors the recombination of hydrogen atoms toward the hydrogen molecules. These interactions are substantially influenced by both the hydrides and the Ti-containing agents.
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影响因子：
6.2
作者：
Dalin Sun;T. Kiyobayashi;H. Takeshita;N. Kuriyama;C. Jensen
通讯作者：
Dalin Sun;T. Kiyobayashi;H. Takeshita;N. Kuriyama;C. Jensen
影响因子：
4.6
作者：
U. Häussermann;H. Blomqvist;D. Noréus
通讯作者：
U. Häussermann;H. Blomqvist;D. Noréus
影响因子：
3.7
作者：
G. Garcia;J. Abriata;J. Sofo
通讯作者：
G. Garcia;J. Abriata;J. Sofo
影响因子：
4
作者：
Graetz, J;Reilly, JJ;Tyson, TA
通讯作者：
Tyson, TA
DOI：
10.1007/s003390100771
发表时间：
2001-02
期刊：
Applied Physics A
影响因子：
--
作者：
S. Orimo;H. Fujii
通讯作者：
S. Orimo;H. Fujii