| 陈广新,余林,林永强,王明强.La-Sr-Fe-Co系钙钛矿型汽车尾气净化催化剂的性能研究[J].分子催化,2005,(4):260-265 |
| La-Sr-Fe-Co系钙钛矿型汽车尾气净化催化剂的性能研究 |
| The Investigation of Catalytic Activity of La-Sr-Fe-Co Perovskite-type-oxide |
| 投稿时间：2004-06-22 修订日期：2004-11-24 |
| DOI： |
| 中文关键词: 钙钛矿 丙烯 选择性催化还原 |
| 英文关键词:NO |
| 基金项目:广东省自然科学基金;教育部优秀青年教师资助计划 |
| 陈广新 余林 林永强 王明强 |
| [1]汕头大学化学系,广东汕头515063 [2]广东工业大学轻工化工学院,广东广州510090 |
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| 中文摘要: |
| 用柠檬酸配合法制备了钙钛矿型复合氧化物La0.8 Sr0.2 Fex Co1-xO3催化剂，研究了Fe和Co的含量对丙烯和氮氧化合物的催化转化的影响，并对其热稳定性进行了考察，用XRD、Mossbauer谱、O2-TPD和IR表征手段将催化剂性能与Fe、Co含量和氧脱附性能进行了关联，研究结果表明：适量的Co和Fe离子的存在，不但能使催化剂结构更接近理想钙钛矿型，而且对催化剂反应性能都起着积极的作用；氧在反应中起着非常关键的作用；催化剂显示了良好的热稳定性。 |
| 英文摘要: |
| The selective catalytic reduction of NO with propene over La0.8 Sr0.2 Fex Co1-xO3 catalysts prepared by sol-gel method and their thermal stability were studied. The catalysts were characterized by XRD, IR, O2-TPD and Mossbauer spectroscopy. The results were correlated to the catalytic activity, the tolerance factors of the perovskite-type-oxide and oxygen adsorption. The results showed that the introduction of appropriate amounts of Co and Fe cations not only led to the formation of a more perfect structure of the perovskite-type-oxide catalysts but also showed a positive effect on the active oxygen adsorption species and their reactivities. Oxygen played an important role in the selective catalytic reduction of NO with propene. The La0.8 Sr0.2 Fex Co1-xO3 perovskite-type-oxide catalysts showed excellent thermal stabilities. |
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