キーワード: 三元触媒,自動車排ガス浄化,ジルコン酸バリウム,セリウム ドープ Cerium-doped barium zirconate (Ce-doped BaZrO 3 ) fine particles with high crystallinity was prepared by a hydrothermal reaction using barium hydroxide, CeCl 3 , and a Zr-triethanolamine complex. Characterization of the Ce-doped BaZrO 3 particles revealed that utilization of the water-stable Zr-triethanolamine complex was an efficient way to introduce cerium ions into the BaZrO 3 perovskite crystal structure. The three-way catalytic activity of the

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... d BaZrO 3 for an exhaust gas conversion reaction was investigated under a stoichiometric condition (CO 0.5%, C 3 H 6 400 ppm, NO 500 ppm, O 2 0.49%, H 2 0.17%, CO 2 14%, H 2 O 10% in N 2 ). The Ce-doped BaZrO 3 exhibited a remarkable low temperature NO x cleaning performance when the Ce-doped BaZrO 3 was applied as an alternative for an Al 2 O 3 support.