Iron-cobalt-based catalyst as well as preparation method and application thereof

Abstract

The invention belongs to the field of catalysts, and particularly relates to an iron-cobalt-based catalyst and a preparation method and application thereof. The iron-cobalt-based catalyst provided by the invention is prepared according to the following steps: a) mixing iron acetate, zinc acetate, cobalt acetate, polyvinylpyrrolidone and ethylene glycol, carrying out a reflux reaction, and sintering the reaction product under an aerobic condition to obtain a sintered product; and b) dipping a sodium salt solution into the sintered product, and drying to obtain the iron-cobalt-based catalyst. The preparation method comprises the following steps: firstly, by taking ferric acetate, zinc acetate and cobalt acetate as main raw materials, carrying out reflux reaction and sintering treatment to obtain cobalt-doped ZnFe2O4; and then carrying out surface modification on the cobalt-doped ZnFe2O4 by using sodium salt to finally obtain the iron-cobalt-based catalyst with excellent CO2 conversion rate and olefin selectivity.