Preparation and characterization of La_(1-x)Ce_xFe_(1-y-n)Co_yRu_nO_3 compounds  

作　　者：李丽 张密林 袁福龙 史克英 张国 付宏刚 

机构地区：[1]Postdoctoral Workstation of Materials Science and Technology Harbin Engineering University [2]School of Chemistry and Materials Science, Heilongjiang University

出　　处：《Journal of Harbin Institute of Technology(New Series)》2006年第4期498-501,共4页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.20271019 and 20576027);the Natural Science Foundation of HeilongjiangProvince(Grant No.B200504);the Postdoctoral Foundation of Heilongjiang Province(Grant No.LBH-Z05066);Education Office Foundation ofHeilongjiang Province(Grant No.11511270).

摘　　要：The mixed oxides La1 -xCexFe1-y-nCOyRunO3 were prepared by sol-gel method and used as catalysts for NO direct decomposition. The catalysts were characterized by DTA - TG, XRD, IR and BET. XRD analysis reveals that the samples are in a pure perovskite phase in 550 - 650 ℃, and catalyst structure keeps long else 20 decrease, and lattice parameters enhance when Ru is introduced. The characteristic peaks of samples are stronger during a temperature increase, and the particle size grows faster. IR analysis shows that the position and shape of adsorption peaks are almost the same among all samples, but with the Ru content increasing, 600 cm^-1 peak stretches to a high frequency and changes to disorder. The wave numbers move to low frequency when n = 0. 05, yet it doesn＇ t vary obviously when n 〉 0. 05. The BET surface area testifies that particle sizes of all catalysts increase with temperature increasing.The mixed oxides La 1-x CexFe 1-y-n CoyRunO3 were prepared by sol-gel method and used as catalysts for NO direct decomposition. The catalysts were characterized by DTA-TG, XRD, IR and BET. XRD analysis reveals that the samples are in a pure perovskite phase in 550～650 ℃, and catalyst structure keeps long else 2θ decrease, and lattice parameters enhance when Ru is introduced. The characteristic peaks of samples are stronger during a temperature increase, and the particle size grows faster. IR analysis shows that the position and shape of adsorption peaks are almost the same among all samples, but with the Ru content increasing, 600 cm -1 peak stretches to a high frequency and changes to disorder. The wave numbers move to low frequency when n=0.05, yet it doesn’t vary obviously when n>0.05. The BET surface area testifies that particle sizes of all catalysts increase with temperature increasing.

关 键 词：sol-gel preparation DOPING perovskite type phase direct decomposition of NO 

分 类 号：O643.36[理学—物理化学]