Preparation method of cerium-based composite oxide low-temperature SCR catalyst taking Ce-MOF as precursor

The invention discloses a preparation method of a cerium-based composite oxide low-temperature SCR catalyst taking Ce-MOF as a precursor, and belongs to the technical field of catalyst preparation. The method comprises the following specific steps: dissolving trimesic acid (BTC) into an organic solvent, adding a cerium salt solution, and stirring for 15 min at a proper temperature to obtain a Ce-MOF sample; dissolving a soluble modified metal source into ethanol, adding Ce-MOF, and stirring for 12 h at a certain temperature to obtain a precursor of a composite oxide catalyst; and roasting andgrinding the precursor, so as to obtain the CuO-CeO2 and Fe2O3-CeO2 low-temperature SCR catalyst. According to the invention, high dispersion of CuO or Fe2O3 on CeO2 is realized by utilizing the highspecific surface area, ordered pore structure and relatively strong adsorption capacity of Ce-MOF, so that the low-temperature SCR reaction catalytic activity of the composite oxide is remarkably improved. 一种以Ce-MOF为前驱体的铈基复合氧化