| LnSrCoO4稀土复合催化材料制备与表征 |
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| 引用本文： | 方勤,王仁清.LnSrCoO4稀土复合催化材料制备与表征[J].稀土,2006,27(3):61-64. |
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| 作者姓名： | 方勤 王仁清 |
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| 作者单位： | 江西财经大学,材料研究所,江西,南昌,330013 |
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| 摘 要： | 首次采用聚乙二醇凝胶法制备了Co系类钙钛矿LnSrCoO4(Ln=La,Pr,Nd,Sm,Eu) 复合氧化物,研究了稀土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、BET、TPD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稀土不同而变化,其中以LaSrCoO4催化活性最好,这是由LaSrCoO4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： | CO氧化 C3H8氧化 |
| 文章编号： | 1004-0277(2006)03-0061-04 |
| 修稿时间： | 2004年12月29 |
Preparation and Characterization of LnSrCoO4 Rare Earth Mixed Catalyst |
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| FANG Qin,WANG Ren-qing.Preparation and Characterization of LnSrCoO4 Rare Earth Mixed Catalyst[J].Chinese Rare Earths,2006,27(3):61-64. |
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| Authors: | FANG Qin WANG Ren-qing |
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| Abstract: | Perovskite-like LnSrCoO_(4)(Ln=La,Pr,Nd,Sm,Eu) mixed oxides were prepared by the polyglycol gel method,investigated by using the XRD,BET and TPD, and used successfully for CO and C_(3)H_(8) oxidization.In addition,the effects of rare earth on their structure and catalytic activities of these samples were studied.The results indicate that all LnSrCoO_(4) have K_(2)NiF_(4) structure,their structure and catalytic activities changes regularly with the change of rare earth.The catalytic activity of LaSrCoO_(4) is the best among all samples,this is explained in terms of more mobile lattice oxygen,higher content of Co~(3+),more oxygen vacancies and more chemisorbed oxygen of LaSrCoO_(4). |
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| Keywords: | LnSrCoO4 BET O2-TPD |
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