| 张继军,刘英骏.锰掺入对CeO2催化氧化CO性能的影响[J].分子催化,1999,(3):219-222 |
| 锰掺入对CeO2催化氧化CO性能的影响 |
| Effect of Doping Ceria with Manganese on Catalytic Activity for CO Oxidation |
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| DOI： |
| 中文关键词: 氧化铈 氧化锰 Mn－Ce－O催化剂 萤石矿型复合氧化物 CO氧化 掺杂效应 |
| 英文关键词:Ceria,Manganese oxide,MnCeO
catalysts,Fluoritetype complex oxides,CO oxidation,Doping effect |
| 基金项目: |
| 张继军 刘英骏 |
| 北京大学 |
| 摘要点击次数: 1466 |
| 全文下载次数: 16 |
| 中文摘要: |
| 氧化铈具有萤石矿型结构，并且随着氧化还原气氛的不同，铈可以Ｃｅ４＋／Ｃｅ３＋价态存在，在结构中易于形成流动性的氧空位，这些性质使得它成为很好的催化氧化活性材料；ＣｅＯ２经贱金属掺杂之后，可进一步提高其催化氧化活性，近年来倍受人们的重视［１，２］．锰的... |
| 英文摘要: |
| MnCeO catalysts, synthesized by amorphous citrate
precursor (ACP) method were characterized by XRD, Microreactor and H2TPR techniques.
When the CeO2 bulk was doped with manganese ions , fluorite structure formed at low
manganese contents, while both fluorite structure and Mn3O4 formed at high manganese
contents. The catalytic activity for CO oxidation is improved by doping CeO2 matrix with
manganese ions. According to H2TPR, MnCeO(25) can be reduced more easily than Mn3O4 and
CeO2 due to the formation of fluoritetype complex oxides. The composition of MnCeO catalysts
with the highest activity is Mn0.25Ce0.75O2. |
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