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    • 40. 发明授权
    • Exhaust-gas-purifying catalyst
    • 废气净化催化剂
    • US08975204B2
    • 2015-03-10
    • US11665973
    • 2004-10-28
    • Asuka HoriKeiichi NaritaAkimasa Hirai
    • Asuka HoriKeiichi NaritaAkimasa Hirai
    • B01J23/00B01J23/10B01D53/94B01J23/63B01J37/02
    • B01D53/945B01D2255/206B01D2255/407B01D2255/902B01J23/63B01J37/0244F01N2510/06F01N2510/0684Y02T10/22
    • The present invention relates to a catalyst for purifying exhaust gases emitted from the internal combustion engines.The exhaust-gas-purifying catalyst in this invention, comprising: a catalyst support substrate and a plurality of catalyst layers formed on a surface of the catalyst support substrate and having an exterior-surface layer for forming a surface of the plural catalyst layers, and the exterior-surface layer including a loading layer formed by fireproof inorganic oxide; at least one catalytic metal selected from the group consisting of platinum, palladium and rhodium, and supported on the loading layer; stabilized zirconia loaded on the loading layer; and cerium-zirconium composite oxide loaded on the loading layer, and the stabilized zirconia including zirconia and oxide formed by at least one additive member selected from the group consisting of yttrium, neodymium, praseodymium and lanthanum. The durability of the exhaust-gas-purifying catalyst was improved by having the stabilized zirconia and cerium-zirconium composite oxide in the exterior-surface layer.
    • 本发明涉及一种用于净化从内燃机排出的废气的催化剂。 本发明的废气净化催化剂,其特征在于,包括:催化剂载体基板和形成在所述催化剂载体基板的表面上并具有形成所述多个催化剂层的表面的外表面层的多个催化剂层, 所述外表面层包括由耐火无机氧化物形成的加载层; 至少一种选自铂,钯和铑的催化剂金属,并负载在载体层上; 负载层上的稳定的氧化锆; 负载在负载层上的铈锆复合氧化物,以及由选自钇,钕,镨和镧的至少一种添加剂构成的包含氧化锆和氧化物的稳定化氧化锆。 通过在外表面层中具有稳定的氧化锆和铈 - 锆复合氧化物,改善了废气净化催化剂的耐久性。