| La_(0.8)M_(0.2)Fe_(1-x)Cu_xO_3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_(0.8)M_(0.2)Fe_(1-x)Cu_xO_3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(4). |
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| 作者姓名： | 郭锡坤 孟韩 陈耀文 |
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| 作者单位： | 汕头大学理学院化学系;汕头大学中心实验室; |
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| 基金项目： | 广东省科技计划项目(2006B36702003); 国家自然科学基金(60971075) |
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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La0.8M0.2Fe1-xCuxO3(M为Sr、Ba和Ce).催化性能测定结果发现,800℃焙烧所制得的La0.8Ce0.2Fe0.7Cu0.3O3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,La0.8Ce0.2Fe0.7Cu0.3O3具有良好的钙钛矿型晶体结构,晶粒为纳米级,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_(0.8)M_(0.2)Fe_(1-x)Cu_xO_3 Perovskite-Type Mixed Oxides |
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| GUO Xi-kun,MENG Han,CHEN Yao-wen.Preparation and Three-Way Catalytic Property of La_(0.8)M_(0.2)Fe_(1-x)Cu_xO_3 Perovskite-Type Mixed Oxides[J].Journal of Shantou University(Natural Science Edition),2011(4). |
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| Authors: | GUO Xi-kun MENG Han CHEN Yao-wen |
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| Institution: | GUO Xi-kun1,MENG Han1,CHEN Yao-wen2(1.Department of Chemistry,Shantou University,Shantou 515063,Guangdong,China,2.Central Laboratory,China) |
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| Abstract: | A series of La0.8M0.2Fe1-xCuxO3(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 La0.8M0.2Fe0.7Cu0.3O3 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 La0.8M0.2Fe0.7Cu0.3O3 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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