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Preparation of high oxygen storage capacity and thermally stable ceria-zirconia solid solution

机译：制备的高存储容量和氧气耐热ceria-zirconia固溶体

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摘要

Ceria-zirconia solid solution is a very important material in three-way catalysts for automotive emission control. High oxygen storage capacity (OSC) and thermally stable Ce0.5Zr0.5O2 was prepared by a modified complexing-coprecipitation (CC) method, and its surface area reached 44 m(2) g(-1) after calcination at 1100 degrees C for 6 h. Based on the characterizations of its structural and physicochemical properties, it was found that Ce0.5Zr0.5O2 prepared by the CC method existed as the t ''-phase with rich oxygen defects and surface Ce3+ and has a larger BET surface area, uniform particle and pore sizes, and excellent bulk oxygen migration and redox abilities than samples prepared by other methods. After being calcined at 1100 degrees C for 6 h, its surface area, OSC (and OSCC, oxygen storage capacity complete) and catalytic activity for the oxidation of CO were still the best among three Ce0.5Zr0.5O2 solid solutions prepared by three methods whether it was used as the catalyst or as a support for a Pd catalyst, reflecting its good thermostability, although its particle and pore sizes were somewhat increased. This complexing-coprecipitation method can be used to prepare other high surface area and thermally stable inorganic materials.
机译：Ceria-zirconia固溶体是非常重要的材料在三方汽车催化剂排放控制。(OSC)和耐热Ce0.5Zr0.5O2由一个complexing-coprecipitation修改(CC)方法,其表面积达到44 m (2)g(1)煅烧后,在1100摄氏度为6h。基于特征的结构和理化性质,它是发现Ce0.5Zr0.5O2 CC准备的方法存在t”步丰富的氧气缺陷和表面Ce3 +和有一个更大的赌注表面积、均匀的颗粒和孔隙的大小,和优秀的大部分氧迁移和氧化还原能力比其他样品准备的方法。煅烧后在1100度C 6 h,它的表面积,OSC (OSCC,氧气储存能力完成)和催化活性氧化有限公司仍然是三个中最好的由三个Ce0.5Zr0.5O2坚实的解决方案方法是否用作催化剂或支持一个Pd催化剂,反映良好耐热性,但其颗粒和孔隙大小都有所增加。complexing-coprecipitation方法可以使用准备其他高表面积和热稳定的无机材料。

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