| La2-xSrxCoO4±λ(x=0～1.0)催化剂的结构及催化性能 |
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| 引用本文： | 杨小毛,罗来涛,钟华.La2-xSrxCoO4±λ(x=0～1.0)催化剂的结构及催化性能[J].化工学报,2004,55(11):1799-1802. |
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| 作者姓名： | 杨小毛 罗来涛 钟华 |
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| 作者单位： | 南昌大学应用化学研究所,江西 南昌 330047;江西财经大学材料研究所，江西 南昌 330013 |
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| 摘 要： | 采用聚乙二醇凝胶法制备了Co系类钙钛矿La2-xSrxCoO4±λ(x=0～1.0)复合氧化物，研究了系数x对催化剂的结构和催化性能的影响，考察了它们对 CO和C3H8的氧化反应活性，并运用XRD、IR、BET、TPD和化学分析等方法对催化剂进行了表征.结果表明：该类复合氧化物具有K2NiF4结构，它们的结构和催化性能随系数x不同而变化，其中以LaSrCoO4-λ催化活性最好，这是由LaSrCoO4-λ的晶格氧更易移动、Co3+离子含量更高，氧空位和反应时化学吸附氧更多所致.
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| 关 键 词： | La2xSrxCoO4±λ O2TPD CO氧化 C3H8氧化 |
| 文章编号： | 0438-1157(2004)11-1799-04 |
| 收稿时间： | 2003-11-23 |
| 修稿时间： | 2003年11月23 |
STRUCTURE OF La2-xSrxCoO4±λ AND THEIR CATALYTIC PROPERTIES IN OXIDIZATION OF CO AND C3H8 |
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| YANG Xiaomao,LUO Laitao,ZHONG Hua.STRUCTURE OF La2-xSrxCoO4±λ AND THEIR CATALYTIC PROPERTIES IN OXIDIZATION OF CO AND C3H8[J].Journal of Chemical Industry and Engineering(China),2004,55(11):1799-1802. |
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| Authors: | YANG Xiaomao LUO Laitao ZHONG Hua |
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| Abstract: | The perovskite-like La2-xSrxCoO4±λ(x=0—1.0)mixed oxides were prepared by the polyglycol gel method, investigated by using the XRD, IR, BET, TPD and chemical analysis methods, and used successfully for CO and C3H8 oxidization.In addition, the effects of coefficient x on their structure and catalytic activities of these samples were studied.The results indicate that all La2-xSrxCoO4-λhave K2NiF4 structure, their structure and catalytic activities change regularly with the change of coefficient x.The catalytic activity of LaSrCoO4-λ is the best among all samples, which can be explained in terms of more mobile lattice oxygen, higher content of Co3+, more oxygen vacancies and more chemisorbed oxygen of LaSrCoO4-λ. |
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