Preparation method of composite metal oxide catalyst and prepared composite metal oxide catalyst

The invention discloses a preparation method of a composite metal oxide catalyst for directly decomposing nitrous oxide and the prepared composite metal oxide catalyst, and the composite metal oxide catalyst is a metal oxide catalyst and is obtained by screening the metal oxide catalyst to 40-60 meshes. The composite metal oxide catalyst is synthesized by adopting a coprecipitation method and a coprecipitation-impregnation method, and is modified by at least one of iron, sodium, potassium and manganese. The composite metal oxide catalyst is subjected to N2O direct decomposition catalytic performance evaluation, and the N2O conversion rate can reach 90% at 432 DEG C. The preparation method of the composite metal oxide catalyst has the advantages of simplicity, low cost, excellent catalytic performance, high stability, high mechanical strength and the like. 本发明公开了一种用于直接分解氧化亚氮的复合金属氧化物催化剂的制备方法及其所制备出的复合金属氧化物催化剂，所述复合金属氧化物催化剂为金属氧化物催化剂，经筛分到40至60目后得到。所述复合金属氧化物催化剂采用共沉淀法和共沉淀-浸渍法进行合成，其中由铁、钠、钾、锰中的至少一种进行改性。所述复合金属氧化物催化剂经进行N