| 铈部分取代镧的La—Mn系钙钛矿型催化剂性能研究 |
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| 引用本文： | 梁珍成,秦永宁.铈部分取代镧的La—Mn系钙钛矿型催化剂性能研究[J].天津大学学报(自然科学与工程技术版),1997,30(6):703-710. |
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| 作者姓名： | 梁珍成 秦永宁 |
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| 摘 要： | 采用共沉淀法制得了Ｃｅ＾４＋部分取代Ｌａ＾３＋的Ｌａ１０ｘＣｅｘＭｎＯ３钙钛矿型催化剂，结果表明，随Ｃｅ＋＋取代量ｘ的增加，Ｌａ１－ｘＣｅｘＭｎＯ３催化剂越易还原，其还原活化能逐渐降低，对ＣＯ、ＣＨ４氧化反应其活性有一最佳值，对ＣＯ反应ｘ为０．４；对ＣＨ４反应ｘ为０．２，这是由于随ｘ的增大，催化剂晶格缺陷增多，晶格氧的化学势增大而造成的。
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| 关 键 词： | 钙钛矿型催化剂 催化性能 稀土元素 催化剂 |
STUDY ON PROPERTIES OF THE La Mn SYSTEM PEROVSKITE TYPE CATALYSTS SUBSTITUTING Ce 4 FOR PARTIAL La 3 |
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| Liang Zhencheng,Qin Yongning,Qi Xiaozhou,Qiao Guandong,Liao Qiaoli.STUDY ON PROPERTIES OF THE La Mn SYSTEM PEROVSKITE TYPE CATALYSTS SUBSTITUTING Ce 4 FOR PARTIAL La 3[J].Journal of Tianjin University(Science and Technology),1997,30(6):703-710. |
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| Authors: | Liang Zhencheng Qin Yongning Qi Xiaozhou Qiao Guandong Liao Qiaoli |
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| Institution: | Dept. of Chem. Eng. |
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| Abstract: | The catalytic properties of La 1-x Ce xMnO 3 perovskite type catalysts prepared by coprecipitation have been studied. The results reveal that the reduction activition energy of La 1-x Ce xMnO 3 catalysts decreases with the increase of x from 0.0 to 0.6 and the activity of the catalysts for CO and CH 4 oxidation has a maxium point (for CO oxidation x =0.4 and for CH 4 oxidation x =0.2). It is considered that the above behaviour is caused by the enhancement of lattice defect and the chemical potential of lattice oxygen in the catalysts with the increase of x . |
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| Keywords: | perovskite type catalysts partial substitution catalytic performance |
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