阳极氧化法制备消氢催化剂金属载体及其性能研究

摘要

In phosphoric acid solution, porous alumina films were fabricated for elimination hydrogen by anodization. The anodization conditions, voltage, current density, oxidation temperature, oxidation time and hot water sealing were studied. And the porous anodic aluminum oxide was investigated by scanning electron microscopy. The results of SEM for fabricated porous alumina films showed that the thickness of anodic alumina films can reach 13.4 μm and the pores diameter 100 nm. In the condition of normal temperature,H2 concentration 1.1％ ～ 1.3％, space velocity 20 000 L/h, the elimination hydrogen efficiency of the elimination hydrogen catalyst made from supports fabricated as above by supported Pt-Pd was above 85％.%用阳极氧化法制备消氢催化剂金属载体,以磷酸为电解液考察了温度、氧化时间、氧化电压、电流最大密度以及水封处理对氧化膜表面的影响,用SEM表征方法对多孔氧化铝膜进行了表征.结果表明,氧化膜厚度达13.4 μm.孔径达100 nm.将Pt-Pd负载在自制的载体上制成消氢催化剂,该催化剂可在常温、氢气浓度1.1%～1.3%、空速20 000 L/h时,消氢效率达到85%以上.