Preparation of CeO2-ZrO2 mixed oxide with high surface area and high thermal stability |
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Authors: | Dong Zhang |
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Affiliation: | (1) Department of Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin, 300072, China |
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Abstract: | Ceria-zirconia solid particles have been recognized as a key material of the automotive exhaust catalysts since they can release and uptake oxygen owing to the rapid reversible oxidation states of cerium between Ce3+ and Ce4+. Several methods have recently been described to prepare the CeO2-ZrO2 solid particles used in the catalysts. In this paper, a new coprecipitation method is used to prepare the CeO2-ZrO2 solid particles. The Ce-Zr alcogel is dried and calcined in flowing N2 not in flowing air under atmospheric pressure. The results show that the ceria-zirconia sample calcined at 650 °C has high surface area over 90 m2g−1, which drops to 40 m2g−1 following treatment at 900°C. |
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Keywords: | Ceria-zirconia Solid Particles High Surface Area Thermal Stability A New Co-precipitation Method |
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