| 刘景弟,鲁继青.CoCr2O4型催化剂上二氯甲烷的高效催化燃烧[J].分子催化,2016,30(2):123-130 |
| CoCr2O4型催化剂上二氯甲烷的高效催化燃烧 |
| Highly active spinel type CoCr2O4 catalysts for dichloromethane oxidation |
| 投稿时间：2016-01-05 修订日期：2016-02-25 |
| DOI： |
| 中文关键词: 共沉淀法 尖晶石型催化剂 二氯甲烷 催化氧化 |
| 英文关键词:co-precipitation method spinel catalysts dichloromethane catalytic oxidation |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 采用共沉淀法在不同焙烧温度下制备一系列尖晶石型 CoCr2O4 催化剂并测试其对CH2Cl2催化氧化的性能。制备的催化剂都具有高的反应活性，并发现其性能受到表面酸性和氧化还原性的协同作用。经600 oC 焙烧的CoCr2O4-6催化剂因其具有较高的表面酸量（0.46 mmol•gcat-1）和较高表面吸附氧浓度(Oads/ Olat=0.55)，因此活性最佳，其T50 为201 oC，T90 为278 oC。由XRD等结构表征可知该催化剂含CoCr2O4 和 Cr2O3 两相，但CoCr2O4尖晶石是该催化剂的主要活性组分。 |
| 英文摘要: |
| A series of spinel type CoCr2O4 catalysts calcined at different temperatures were prepared by a co-precipitation method and tested for oxidation of dichloromethane (CH2Cl2). These catalysts were active for this reaction. Detailed quantitative analyses revealed that the catalytic behavior was synergistically governed by surface acidity and redox ability of the catalyst. The best performance was obtained on a catalyst calcined at 600 oC (CoCr2O4-6), with a T50 of 201 oC and a T90 of 278 oC, which was mainly due to the higher surface acidity (0.46 mmol•gcat-1) and the higher concentration of surface absorbed oxygen (Oads/ Olat=0.55). These catalysts contained a mixture of CoCr2O4 and Cr2O3, but the spinel CoCr2O4 was responsible for the observed activity of the catalyst. |
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