Preparation of MgFeNi Composite Oxides and Its Catalytic Ammonia Decomposition Performance
MgFeNi composite oxides with different molar ratios were prepared by the sol-gel method, and their catalytic performance for ammonia decomposition was investigated. The structure-activity relationship of catalysts was discussed combined with a series of characterization. The results show that the catalytic activity of the composite metal oxides is signif-icantly higher than that of the traditional supported non-noble metal catalysts. The increase of the molar ratio of Ni/Fe and the introduction of alkaline earth metal Mg contribute to the enhancement of the catalytic activity, and Mg0.2Ni0.2On reaches 96.9％ ammonia conversion at 600℃. The high activity of composite metal oxides prepared by sol-gel method is due to their homogeneous morphology and uniform distribution of various elements on the surface.
complex metal oxidessol-gel methodammoniahydrogen energycatalyst
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