Room Temperature Synthesis of Metal Hydride

研究了用烃类的强制脱氢反应在室温下合成金属氢化物的方法。建立了4A元素（Ti）和5A元素（V、Nb、Ta）。碳氢化合物是氢的来源，第一项是环己烷第二项是四氟醚。金属粉末和液态碳氢化合物都在氧化锆小瓶中进行球磨。测定了氢的x射线衍射、扫描电镜、热解吸光谱、气相色谱和气相色谱-质谱。铣削后，在室温和1atm下可制得MH2型（TiH2）和MH型（Vh、NbH、TaH）氢化物。环己烷反应时间为500h，四aline反应时间为50h。GC和GC- mass测定表明，金属氢化物的合成反应为简单脱氢反应：*从TDS测量中检测到4A氢化物的单次脱附和5A氢化物的双次脱附。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键合性质是不同的。

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.