| LaCo0.2Fe0．8O4型钙钛矿型催化剂中A位取代对耐热性能的影响 |
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| 引用本文： | 李利民,李明,高贵勇.LaCo0.2Fe0．8O4型钙钛矿型催化剂中A位取代对耐热性能的影响[J].郑州大学学报(理学版),2006,38(3):87-90. |
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| 作者姓名： | 李利民 李明 高贵勇 |
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| 作者单位： | 郑州大学化学系 郑州450001 |
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| 基金项目： | 河南省自然科学基金资助项目,编号0411020300 |
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| 摘 要： | 研究了LaCo0.2Fe0.8O4型钙钛矿型催化剂催化燃烧改变A位取代的程度,发现晶粒度随取代度的增加而减小,同时晶格氧的量有所增大.由于高温使晶粒度增大,晶格氧减少,而适量的晶格氧有利于催化剂活性,所以较大的取代度能够使催化剂在较高温度下保持较好活性.
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| 关 键 词： | 钙钛矿型催化剂 取代度 耐热性 |
| 文章编号： | 1671-6841(2006)03-0087-04 |
| 收稿时间： | 03 3 2006 12:00AM |
| 修稿时间： | 2006年3月3日 |
The Effects of A-site Substitution on the Heat-resisting Property of LaCo0.2Fe0.8O4 Perovskite-type Catalysts |
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| LI Li-min, LIMing, GAO Gui-yong.The Effects of A-site Substitution on the Heat-resisting Property of LaCo0.2Fe0.8O4 Perovskite-type Catalysts[J].Journal of Zhengzhou University:Natural Science Edition,2006,38(3):87-90. |
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| Authors: | LI Li-min LIMing GAO Gui-yong |
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| Institution: | Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China |
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| Abstract: | Investigations on the A-site substitution degree of LaCo_(0.2)Fe_(0.8)O_4 perovskite-type catalysts for catalytic combustion of methane have revealed a reduced crystalline size as a result of increased substitution degree,which also causes increased amount of crystal oxygen.Since the presence of certain amount of crystal oxygen is beneficial for the catalytic activity,while high temperature increases the crystalline size and reduces the amount of crystal oxygen,therefore a higher degree of A-site substitution enables the catalysts to keep high catalytic activity at high temperatures. |
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| Keywords: | perovskite-type catalyst substitution degree heat-resisting property |
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