中文摘要：

采用柠檬酸络合爆炸法合成了La1.6M0.4NiO4（M=Mg、Ca、Sr、Ba）系列类钙钛矿复合氧化物催化剂,通过XRD表征了其物相组成。考察了该系列催化剂催化分解NO的活性,并利用H2-TPR技术研究了不同碱土元素取代时对复合氧化物催化剂的氧化还原能力的影响,从而影响了样品的催化性能。结果表明：碱土金属Ba的取代可明显提高复合氧化物的催化活性,Ba的掺入有效的提高了样品的氧化能力,从而催化效率得以提高。

英文摘要：

The complex oxides La1.6M0.4NiO4（M=Mg,Ca,Sr,Ba） with perovskite - like structure have been synthesized by citrate combustion method, which were investigated by XRD to explore their composition. And the catalytic activity for NO decomposition was also tested. At the same time, H2 -TPR measurement was performed to explore the effect of substituting alkaline - earth metals for La on redox - capability, which resulted in the change of catalytic capability. It was found that the sample of substituting Ba for La performed best activity. It seems that the Ba substitution promotes the redox capability of catalysts and improves the mobility of lattice oxygen, which possibly leads to good catalytic performance.