Room Temperature Synthesis of Metal Hydride

我们用烃类的矫顽力诱导脱氢反应考察了金属氢化物的室温合成。建立了4A元素(Ti)和5A元素(V、Nb、Ta)。碳氢化合物是氢气的来源，我们在第一阶段使用环己烷，在第二阶段使用四氢呋喃。金属粉末和液态碳氢化合物都是在氧化锆瓶中进行球磨的。用X射线衍射仪、扫描电子显微镜、氢的热脱附谱、GC和GC-MAS对氢化物进行了表征，球磨后得到了MH2型(TiH2)和MH型(VH，NBH，taH)氢化物。环己烷为500h，四氢呋喃为50h。从GC和GC-MS测量表明，金属氢化物的合成反应是简单的脱氢反应，如下：从TDS测量中检测到4A氢化物的单脱附和5A氢化物的双脱附。这意味着在MH和MH2氢化物中，氢原子的位置和金属原子与氢原子之间的成键性质是不同的。

We examined the room temperature systhmysis of metal hydrides by the coercively induced dehydrogenation reaction of hydrocarbons. 4A element(Ti) and 5A elements (V,Nb, Ta) were instituted. For hydrocarbons, which are the source of hydrogen, we used cyclohexane at the first term and tetraline at the second term. Both of metal powders and liquid hydrocarbons are ball-milled in the zirconia vial. We measured X-ray diffraction, SEM observation, thermal desorption spectroscopy of hydrogen, GC and GC-MASS.After milling, MH2 type (TiH2) and MH type (Vh, NbH,TaH) hydrides were obtained at room temperature and at 1 atm. The time required was 500h for cyclohexane and 50h for tetraline. From the GC and GC-MASS measurement, it was indicated that the synthesis reaction of metal hydride was the simple dehydrogenation one, as follows ;*From the TDS measurements the single desorption was detected for 4A hydrides and the double desorption for 5A hydrides. This means that the site of hydrogen atom and the nature of the bonding between metal atoms and hydrogen atoms are deferent each other in MH and MH2 hydrides.