- 专利标题: EXHAUST GAS PURIFICATION CATALYST
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申请号: US18177170申请日: 2023-03-02
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公开(公告)号: US20230294078A1公开(公告)日: 2023-09-21
- 发明人: Nobusuke Kabashima , Tetsuya Shinozaki
- 申请人: Nobusuke Kabashima , Tetsuya Shinozaki
- 申请人地址: JP Toyota-shi
- 专利权人: TOYOTA JIDOSHA KABUSHIKI KAISHA,CATALER CORPORATION
- 当前专利权人: TOYOTA JIDOSHA KABUSHIKI KAISHA,CATALER CORPORATION
- 当前专利权人地址: JP Toyota-shi; JP Kakegawa-shi
- 优先权: JP 22040137 2022.03.15
- 主分类号: B01J23/44
- IPC分类号: B01J23/44 ; B01J21/04 ; B01J37/02 ; B01J23/42 ; B01D53/94
摘要:
Provided is an exhaust gas purification catalyst improved in warm-up performance while suppressing HC poisoning of a noble metal in an atmosphere in which an air-fuel ratio (A/F) is rich and the HC poisoning easily occurs. The present disclosure relates to an exhaust gas purification catalyst that includes a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer includes a lower coating layer coated on the substrate and an upper coating layer coated on the lower coating layer. The lower coating layer contains a noble metal. The upper coating layer contains Pd and/or Pt. The Pd and/or Pt contained in the upper coating layer is supported on A12O3 by a certain amount or more. A thickness of the upper coating layer is adjusted.
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