类钙钛矿型La_(1.6)M_(0.4)NiO_4(M=Mg,Ca,Sr,Ba)催化分解NO的研究  

Study on catalytic decomposition of NO over perovskite-like La_(1.6)M_(0.4)NiO_4(M=Mg, Ca, Sr, Ba)

作　　者：王东[1] 朱宇君[2] 袁福龙[2] 

机构地区：[1]韩山师范学院学生处,潮州521041 [2]黑龙江大学化学化工与材料学院

出　　处：《黑龙江大学自然科学学报》2008年第3期381-384,共4页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金资助项目(20271019);黑龙江省教育厅2006年科学技术研究面上资助项目(11511270)

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。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.

关 键 词：碱土金属 类钙钛矿 NO分解 

分 类 号：O643.36[理学—物理化学]