Exhaust gas purifying catalyst
    1.
    发明公开
    Exhaust gas purifying catalyst 审中-公开
    废气净化催化剂

    公开(公告)号:EP1674148A2

    公开(公告)日:2006-06-28

    申请号:EP05028154.2

    申请日:2005-12-22

    IPC分类号: B01D53/94

    摘要: An exhaust gas purifying catalyst comprises a substrate having a through hole serving as a passage for exhaust gas; and a catalyst coating layer formed on an internal surface of the through hole. The catalyst coating layer contains: a component (i): a precious metal; and a component (ii): at least one of a Zr oxide, a Ce oxide and a ZrCe mixed oxide. On an upstream portion of the passage, an oxide equivalent weight of Zr is within a range of 51-100 wt% of an oxide equivalent weight of Zr and Ce contained in the component (ii). On a downstream portion of the passage, the component (ii) includes at least one of a Ce oxide and a ZrCe mixed oxide in which an oxide equivalent weight of Ce is within a range of 58·100 wt% of an oxide equivalent weight of Zr and Ce contained in the ZrCe mixed oxide.

    摘要翻译: 一种废气净化催化剂包括:具有用作废气通道的通孔的基板; 以及形成在通孔的内表面上的催化剂涂层。 催化剂涂层含有:组分(i):贵金属; 和组分(ii):Zr氧化物,Ce氧化物和ZrCe混合氧化物中的至少一种。 在通道的上游部分,Zr的氧化物当量在组分(ii)中包含的Zr和Ce的氧化物当量的51-100wt%的范围内。 在通道的下游部分,组分(ii)包含Ce氧化物和ZrCe混合氧化物中的至少一种,其中Ce的氧化物当量在氧化物当量重量的58.100wt% Zr和Ce含在ZrCe混合氧化物中。