| La_0.8M_0.2Fe_l-xCuO3 钙钛矿型氧化物的制备及催化性能研究 |
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| 引用本文： | 郭锡坤,孟韩,陈耀文. La_0.8M_0.2Fe_l-xCuO3 钙钛矿型氧化物的制备及催化性能研究[J]. 汕头大学学报(自然科学版), 2011, 26(4): 22-28,45 |
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| 作者姓名： | 郭锡坤 孟韩 陈耀文 |
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| 作者单位： | 1. 汕头大学理学院化学系,广东汕头,515063
2. 汕头大学中心实验室,广东汕头,515063 |
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| 基金项目： | 广东省科技计划项目，国家自然科学基金 |
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| 摘 要： | 采用溶胶－凝胶法制备了一系列钙钛矿复合氧化物La_0.8M_0.2Fe_l-xCuO3 （M为Sr、Ba和Ce）．催化性能测定结果发现，800℃焙烧所制得的La_0.8M_0.2Fe_l-xCuO3 具有良好的三效催化性能，在该催化剂上C3H6、、CO和NO的起燃温度较低，分别为225℃、200℃和280℃，并且在温度达到325℃之前都能得到完全转化．扫描电子显微镜和x射线衍射测试分析表明，La_0.8M_0.2Fe_l-xCuO3 具有良好的钙钛矿型晶体结构，品粒为纳米级，团聚不严重，这可能是其三效催化性能良好的主要因素．
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| 关 键 词： | 钙钛矿 三效催化剂 溶胶-凝胶法 铁 铜 |
Preparation and Three-Way Catalytic Property of La_0.8M_0.2Fe_l-xCuO3 Perovskite-Type Mixed Oxides |
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| GUO Xi-kun,MENG Han,CHEN Yao-wen. Preparation and Three-Way Catalytic Property of La_0.8M_0.2Fe_l-xCuO3 Perovskite-Type Mixed Oxides[J]. Journal of Shantou University(Natural Science Edition), 2011, 26(4): 22-28,45 |
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| Authors: | GUO Xi-kun MENG Han CHEN Yao-wen |
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| Affiliation: | 1. Department of Chemistry, Shantou University, Shantou 515063, Guangdong, China; 2. Central Laboratory, Shantou University, Shantou 515063, Guangdong, China) |
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| Abstract: | A series of La_0.8M_0.2Fe_l-xCuO3 （M = Sr,Ba,Ce） perovskite-type mixed oxides were synthesized using sol-gel method. The results of the catalytic property measurement showed that the perovskite-type mixed oxide La_0.8M_0.2Fe_l-xCuO3 catalyst exhibited high three-way catalytic performance when it was calcined at 800 ℃. Under the function of the catalyst, the light tempratures of C3H6, CO and NO were 165 ℃, 302 ℃ and 295 ℃ respectively, the three kinds of gas could be completely converted when in 325 ℃. The structure of the catalyst was analyzed preliminarily by means of X-ray diffraction（XRD） and scanning electron microscopy（SEM）. The results presented that the La_0.8M_0.2Fe_l-xCuO3 catalyst had good perovskite-type crystal structure, and its grain was nanocrystal, and this was the main reason why it exhibited good three-way catalytic property. |
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| Keywords: | peroviskite three-way catalyst sol-gel method iron copper |
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