Preparation of Fei xO based catalyst

This is essentially different from the preparation of Fe304-based catalyst, in which iron is only used to adjust the ratio of Fe +/Fe +, while iron is one of the necessary reactants in preparation of Fei xO-based catalyst although the chemical composition is also controlled via adjusting the ratio of magnetite and iron. That is, the preparation of Fei xO-based catalyst must be adopted by combining processes by the physical melting and chemical reaction. 

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