LnSrNiO_(4-λ)系列复合氧化物的物化性质与对NO分解的催化性能  

Physico Chemical Properties and Catalytic Behavior for NO Decomposition of LnSrNiO 4-λ

作　　者：赵震[1] 杨向光[1] 刘钰[1] 吴越[1] 

机构地区：[1]中国科学院长春应用化学研究所

出　　处：《中国稀土学报》1998年第4期325-321,共1页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金

摘　　要：用柠檬酸络合法合成了Ｋ２ＮｉＦ４结构的ＬｎＳｒＮｉＯ４－λ（Ｌｎ＝Ｌａ，Ｐｒ，Ｎｄ，Ｓｍ，Ｇｄ）系列稀土取代类钙钛石型复合氧化物催化剂，对该系列催化剂的固态物理、化学性质及其对ＮＯ分解的催化性能进行研究。结果表明，该系列复合氧化物催化剂对ＮＯ分解活性都很高，在此基础上对该系列复合氧化物中稀土元素对ＮＯ分解反应的取代效应进行了探讨。Abstract: A series of LnSrNiO 4-λ (Ln=La, Pr, Nd, Sm, Gd) complex oxides with K 2NiF 4 structure, A sites of which are substituted by the light rare earth elements, were prepared. Solid state physico chemical properties of the series of complex oxides were studied. The physico chemical properties include crystal structure, defect structure, IR spectrum, the valence of B site ion, nonstoichiometric oxygen and oxygen species, and the properties of oxidation and reduction etc. The catalytic behavior for NO decomposition of these complex oxides was studied and the results show taht all those complex oxide catalysts have high activity for the direct decomposition of NO(at 900 ℃ the conversion rate of NO is more than 90%). The effect of the substitution of light rare earth elements for A site atom on catalytic behavior for NO decomposition was investigated.

关 键 词：稀土 分解 催化剂 一氧化氮 氮氧化物 

分 类 号：O613.61[理学—无机化学] O634.36[理学—化学]