CATALYTIC PERFORMANCE OF PEROVSKITE-LIKE OXIDES LA1．6BA0．4MO4（M=CO、NI、CU）FOR NO DIRECT DECOMPOSITION

The K2NiF4 type oxides，La1．6Ba0．4MO4（M=Co、Ni、Cu）complex oxides were prepared by citrate combustion method．The characters of these samples were analyzed by XRD and H2-TPR．At the same time，the catalytic activity for NO direct decomposition was also tested．The results demonstrated that the influence to the oxide capability of the various transitional metal at B site was different while Ba substituded for La，but the doping of Ba promotes the redox capability of catalysts and leads to good catalytic performance ultimately．It was found that Ni-base perovskite-like oxides performed the best activity．