| 张妍,李臻,孙伟,夏春谷.钴负载的凹凸棒土催化剂的制备、表征及其催化氧化性能[J].分子催化,2008,(4): |
| 钴负载的凹凸棒土催化剂的制备、表征及其催化氧化性能 |
| Preparation, Characterization and Catalytic Oxidation Performance of Co Supported Attapulgite Catalysts |
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| DOI： |
| 中文关键词: 凹凸棒土,钴,分子氧,催化氧化,环己烯氧化 |
| 英文关键词:Attapulgite,Co,Molecular oxygen,Catalyst,Cyclohexene oxidation |
| 基金项目: |
| 张妍 李臻 孙伟 夏春谷 |
| 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室 |
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| 中文摘要: |
| 利用浸渍法制备了一系列不同钴含量的凹凸棒土催化剂,使用X射线衍射(XRD),X射线光电子能谱(XPS)和红外光谱(IR),详细研究了催化剂的构效关系,结果表明钴和载体发生作用形成了CoAl2O4和CoFe2O4两种晶相.研究了催化剂在无溶剂条件下对环己烯的催化氧化性能,实验结果表明Co-AT-1(钴含量0.46%)催化剂对环己烯氧化表现出较好的催化活性.催化剂的有效活性成分是CoFe2O4. |
| 英文摘要: |
| A series of Co-AT (attapulgite) catalyst samples were prepared by wetness impregnation method. Detailed characterization was conducted by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Infrared spectra (IR), and the results indicated that there existed interaction between Co and support and which can lead to the formation of spinel of CoAl2O4 and CoFe2O4. All catalysts were employed in the liquid-phase oxidation of cyclohexene with oxygen in the absence of any solvents or reducing agents. Among the catalysts tested, Co-AT-1(0.46%Co) gives the best result , and it can be efficiently reused at least four times. The oxidation activity of catalysts could be mainly attributed to the presence of CoFe2O4 rather than CoAl2O4 resulting from characterization. |
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