A Newly Preparation Method for the High Surface Area and Nanosized CeZrBaOx Mixed Oxide Catalyst

摘要

Nanosized catalysts have attracted much attention as a new type of material for its small particles and special character. There has been growing more and more interests in the utilization of cerium-zirconium mixed oxide as catalysts or catalyst's support. Cerium-zirconium mixed oxide is an important base catalyst, which efficiently used in three-way catalyst (TWC) to treat the automotive exhaust gas. The use of cerium-zirconium oxide catalysts in the automotive three-way catalytic converter is mainly as an oxygen storage medium and thermal stabilizer. Despite there are many reports about the application of cerium-zirconium mixed oxide as supporter or additive to some reaction, only a few studies have been paid in the effect of preparation method and their particle size, and on the characterization of barium added into the Ce-Zr mixed oxide. In this paper, a new way to prepare Ce-Zr mixed oxide by adding Ba by macromolecule surface modified method is reported. This new method has the advantages of inexpensive precursors, and the sample is resulted a nanosized particle, high surface area in 119.0 m~2/g and good thermal stability. It is also offers certain advantages, in the use of TWC catalyst.