类钙钛矿型La1．6Ba0．4MO4（M=Co、Ni、Cu）复合氧化物催化分解NO性能的研究

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

摘要: 采用柠檬酸络合爆炸法合成了La1．6Ba0．4MO4（M=Co、Ni、Cu）系列类钙钛矿复合氧化物催化剂，通过 XRD、H2-TPR等分析方法表征了其物相组成及氧化还原能力的变化，并考察了该系列催化剂催化分解 NO的活性．结果表明：Ba的掺杂对于不同过渡金属的氧化性的影响是不同的，但都提高了过渡金属的氧化还原能力，从而提高了样品的催化活性，其中Ni基类钙钛矿的直接分解NO的催化活性是最理想的．

Abstract: 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．