有机金属化学气相沉积法制备的Ni/Al2O3纳米复合材料的氢吸附

研究了通过有机金属化学气相沉积技术及单源分子前躯体方法制备的Ni/Al₂O₃纳米复合材料的氢吸附(存储). 在冷壁的有机金属化学气相沉积反应器中，通过降解Ni(acac)₂粉末基底上的H₂Al(OtBu)]₂制备的Ni/Al₂O₃纳米复合材料. 通过X射线粉末衍射、扫描电镜、透射电镜以及能量色散型X射线荧光光谱等技术表征该复合材料. 采用自制Sievert's设备研究该复合材料的氢吸附(存储)，可以储存约2.9%(重量比)的氢.

Hydrogen Adsorption Study upon Ni/Al2O3 Nano-composite Synthesized by MOCVD Technique

The hydrogen adsorption (storage) studies upon Ni/Al₂O₃ nano-composite prepared by metal organic chemical vapor deposition technique (MOCVD) exploiting single source molec-ular precursor (SSP) approach were carried out. The Ni/Al₂O₃ nano-composite is prepared in cold walled MOCVD reactor by the decomposition of SSP, H₂Al(O^tBu)]₂, on a substrate holding Ni(acac)₂ powder. The SSP is a reducing agent which reduces Ni⁺² to Ni⁰ and works as source for Al₂O₃ matrix in which the Ni⁰ is dispersed. The resulting Ni/Al₂O₃ nano-composite is characterized by XRD, SEM, TEM, and EDX. The hydrogen adsorption (storage) studies are performed using home-made Sievert's type apparatus. The hydrogen storage studies reveal that approximately 2.9% (mass ratio) hydrogen can be stored in the Ni/Al₂O₃ nano-composite. The results show that Ni/Al₂O₃ nano-composite can be a po-tential candidate for hydrogen storage which can be used for onboard fuel purposes.