| 不同铈添加量对CeO2-ZrO2-Al2O3材料性能的影响 | |
| Influence of Different Amounts of Cerium Added on CeO2-ZrO2-Al2O3 Material Properties | |
| 摘要: 采用共沉淀法制备了一系列不同铈添加量的CeO2-ZrO2-Al2O3(CZA)储氧材料，并通过XRD、低温N2吸附-脱附、氧脉冲吸附(OSC)和H2-TPR等手段进行了表征。XRD结果表明，在1 000和1 100 ℃高温焙烧后，当CeO2添加量为8%时样品具有最好的结构稳定性能。N2吸附-脱附结果表明，CeO2添加量为8%时样品具有最好的织构性能，1 000 ℃时，比表面积和孔容分别为：136.6 m2·g-1和0.38 mL·g-1；1 100 ℃时，比表面积和孔容分别为：83.7 m2·g-1和0.23 mL·g-1。OSC结果显示，CeO2添加量为8%时样品具有最大的储氧量，1 000 ℃和1 100 ℃分别为70 μmol·g-1和31 μmol·g-1。H2-TPR结果表明，CeO2添加量为8%时样品具有最佳的还原性能。 | |
| 关键词: CeO2-ZrO2-Al2O3 结构性能 储氧性能 还原性能 | |
| 基金项目: | |
| Abstract: A series of CeO2-ZrO2-Al2O3(CZA)oxygen storage materials with different levels of CeO2 were prepared by coprecipitation and its structure and physicochemical properties were characterized by XRD, low temperature N2 adsorption-desorption, oxygen pulse adsorption (OSC) and H2-TPR. The XRD results demonstrate that when 8% CeO2 was added the sample possesses the best structure properties after calcined at 1 000 ℃ and 1 100 ℃. N2 adsorption-desorption results show when 8% CeO2 was added, the sample exhibits the best texture properties. After calcined at 1 000 ℃, the surface area and pore volume are 136.6 m2·g-1 and 0.38 mL·g-1 respectively. After calcined at 1 100 ℃, the surface area and pore volume are 183.7 m2·g-1 and 0.23 mL·g-1 respectively. Oxygen pulse adsorption (OSC) results show when 8% CeO2 was added, the sample has the best oxygen storage capability, the oxygen storage capability are 70 μmol·g-1 and 31 μmol·g-1 respectively after calcined at 1 000 ℃ and 1 100 ℃. At the same time, H2-TPR results show when 8% CeO2 was added, the sample holds the best redox properties. | |
| Keywords: CeO2-ZrO2-Al2O3 structure properties oxygen storage capacity redox property | |
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| 唐石云,焦 毅,李小双,王 云,王键礼,龚茂初,陈耀强.不同铈添加量对CeO2-ZrO2-Al2O3材料性能的影响[J].无机化学学报,2012,28(5):965-970. | |
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