| MnO_x-CeO_2上表面氧性质及其催化碳烟燃烧性能 |
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| 引用本文： | 张明,付名利,吴军良,黄碧纯,梁红,叶代启.MnO_x-CeO_2上表面氧性质及其催化碳烟燃烧性能[J].中国稀土学报,2011,29(3). |
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| 作者姓名： | 张明 付名利 吴军良 黄碧纯 梁红 叶代启 |
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| 作者单位： | 1. 华南理工大学环境科学与工程学院,广东,广州,510006;华南理工大学"工业聚集区污染控制与生态修复"教育部重点实验室,广东,广州,510006
2. 广州大学化学化工学院,广东,广州,510006 |
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| 基金项目： | 广东省自然科学基金项目(8151009101000025); 广东高校科技成果转化项目(cgzhzd0803)资助 |
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| 摘 要： | 运用TPO,XRD,BET,O2-TPD,H2-TPR,XPS等技术,研究了在CeO2中引入不同Mn含量对催化剂表面氧性质的影响,并重点探讨了吸附于氧空位上的原子吸附氧O-与催化碳烟燃烧活性的关联。结果表明:将Mn中引入CeO2后,MnOx-CeO2晶格中可形成较CeO2更多的氧空位,并有利于氧的活化和迁移,生成了较多原子吸附氧O-;MnOx(0.4)-CeO2在碳烟起燃温度区间有最多的原子吸附氧O-,其碳烟起燃活性最高,对应的起燃温度是346℃,比无催化剂时降低了111℃,比CeO2降低了35℃。
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| 关 键 词： | 碳烟燃烧 表面氧 复合氧化物 X光电子能谱 稀土 |
Characteristic of Surface Oxygen Species and Catalytic Property on MnO_x-CeO_2 for Soot Combustion |
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| Zhang Ming,Fu Mingli,Wu Junliang,Huang Bichun,Liang Hong,Ye Daiqi.Characteristic of Surface Oxygen Species and Catalytic Property on MnO_x-CeO_2 for Soot Combustion[J].Journal of the Chinese Rare Earth Society,2011,29(3). |
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| Authors: | Zhang Ming Fu Mingli Wu Junliang Huang Bichun Liang Hong Ye Daiqi |
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| Institution: | Zhang Ming1,2,Fu Mingli1,Wu Junliang1,Huang Bichun1,Liang Hong3,Ye Daiqi1,2(1.College of Environmental Science and Engineering,South China University of Technology,Guangzhou 510006,China,2.The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education of China,3.College of Chemistry and Chemical Engineering,Guangzhou University,China) |
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| Abstract: | The effect of different Mn contents introduced in CeO2 on the surface oxygen species were characterized by TPO,XRD,BET,O2-TPD,H2-TPR,and XPS.The correlation between catalytic soot combustion activity and atomic absorptive oxygen O-(absorbed on oxygen vacancy) was mainly discussed.The results revealed: the more oxygen vacancies were formed while Mn was added into CeO2 compared with the pure CeO2,favoring the oxygen activation and migration,and more atomic absorptive oxygen O-were generated;MnOx(0.4)-CeO2 had... |
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| Keywords: | soot combustion surface oxygen mixed oxides X-ray photoelectron spectroscopy rare earths |
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