| Co3O4/CeO2的氧化还原性能及反应条件对其CO氧化活性的影响 |
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| 引用本文： | 邵建军,朱锡,申文杰.Co3O4/CeO2的氧化还原性能及反应条件对其CO氧化活性的影响[J].燃料化学学报,2012,40(1):75-79. |
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| 作者姓名： | 邵建军 朱锡 申文杰 |
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| 作者单位： | 1. Post-doctoral Scientific Research Station in 92493 Unit, Chinese People Liberation Army, Dalian 116041, China;
2. Department of Naval Architecture &Ocean Engineering, Naval University of Engineering, Wuhan 430033, China;
3. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116041, China |
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| 基金项目： | 中国博士后科学基金(20100471808) |
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| 摘 要： | 采用沉淀氧化法制备了Co3O4/CeO2催化剂。运用XRD、BET和TPR表征手段,考察了不同钴铈比及焙烧温度对钴铈复合氧化物物理及化学性能的影响,并分别在干、湿条件下进行了一氧化碳氧化反应研究。结果表明,与纯的Co3O4相比,在不同比例的Co3O4/CeO2均经723 K焙烧的各种催化剂中,钴铈原子比为9∶1的复合氧化物粒径较小,比表面积较大,说明适当比例铈的添加能使Co3O4具有较小的粒径。此氧化物经538 K温度焙烧制得的钴铈比为9∶1的复合氧化物中Co3O4平均粒径为7.2 nm, BET比表面积为167.6 m2/g。经TPR考察发现其具有最优的氧化还原性能。
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| 关 键 词： | 氧化钴 氧化铈 一氧化碳 低温 氧化 |
| 收稿时间： | 2011-02-11 |
| 修稿时间： | 2011-05-27 |
Redox property of Co3O4/CeO2 and the effect of reaction conditions on its performance in CO oxidation |
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| SHAO Jian-jun,ZHU Xi,SHEN Wen-jie.Redox property of Co3O4/CeO2 and the effect of reaction conditions on its performance in CO oxidation[J].Journal of Fuel Chemistry and Technology,2012,40(1):75-79. |
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| Authors: | SHAO Jian-jun ZHU Xi SHEN Wen-jie |
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| Institution: | 1.Post-doctoral Scientific Research Station in 92493 Unit,Chinese People Liberation Army,Dalian 116041,China;2.Department of Naval Architecture & Ocean Engineering,Naval University of Engineering,Wuhan 430033,China;3.State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116041,China) |
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| Abstract: | Co3O4/CeO2 catalysts were prepared by co-precipitation-oxidation method and characterized by using X-ray diffraction(XRD),surface area(SBET) measurement and temperature-programmed reduction(TPR).The effect of cobalt content in Co3O4/CeO2 on its physical properties and catalytic performance in CO oxidation was investigated under both the humid and dry conditions.The results indicated that the Co3O4/CeO2 composite with a Co/Ce atomic ratio of 9(calcined at 723 K) exhibits much smaller particle size and higher surface area than pure Co3O4;the addition of cerium to Co3O4 is beneficial to obtain Co3O4 with small particle size.The average particle size and BET surface area of Co3O4 in the Co3O4/CeO2 composite(Co/Ce atomic ratio = 9) calcined at 538 K are 7.2 nm and 167.6 m2/g,respectively.Accordingly,the Co3O4/CeO2 composite exhibits excellent redox property. |
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| Keywords: | Co3O4 CeO2 carbon monoxide low temperature oxidation |
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