含稀土复合氧化物催化剂的催化活性和晶体结构  

The Crystal Structure and Catalytic Activity of a Series of Complex Oxide Catalysts

作　　者：于敏 林培琰[1] Yu Min;Lin Peiyan(Department of Molern Chemistry,China University of Science and Technology,Hefei)

机构地区：[1]中国科学技术大学近代化学系

出　　处：《高等学校化学学报》1986年第7期634-638,共5页Chemical Journal of Chinese Universities

基　　金：中国科学院科学基金资助课题。

摘　　要：本文研究了Ln_(0.7)Sr_(0.3)MnO_(3)(Ln为稀土)系列催化剂上CO和C_(2)H_(6)完全氧化的活性规律。对于不同稀土Ln的取代物,其催化剂的晶体结构差别很大,有的呈正交的钙钛矿晶型,有的呈三方的钙钛矿晶型,还有的不是单一晶型的钙铁矿。实验中发现它们对于CO氧化和对C_(2)H_(6)氧化的活性不同。从CO氧化和C_(2)H_(6)氧化催化反应机理的不同,解释了这一现象。A scries of complex oxide catalysts In0.7Sr0.3MnO_(3) were investigated (Ln=La,Ce,Pr,Nd,Sm,Gd,Tb,Dy,Ho,Er).The crystal structures of these catalysts were determined by X-ray diffraction.Some of them are the single crystals,some of them are varied pcrovskite crystals,the others are not perovskite crystals.The catalytic activities of these catalysts are very different for oxidation of CO and C_(2)H_(6).It was explained that the mechanism of oxidation of CO and C_(2)H_(6) is different,and the effect of surface area and dimension of crystal cell are different.

关 键 词：催化反应机理 复合氧化物催化剂 晶体结构 完全氧化 催化活性 CO氧化 取代物 钙钛矿 

分 类 号：O64[理学—物理化学]