- 专利标题: Exhaust gas purification catalyst
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申请号: US16857566申请日: 2020-04-24
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公开(公告)号: US11053833B2公开(公告)日: 2021-07-06
- 发明人: Isao Chinzei , Masahide Miura , Seiji Nakahigashi , Hiromasa Suzuki , Toshio Yamamoto , Akira Morikawa , Satoru Katoh , Takashi Onozuka , Hirotaka Ori , Mitsuyoshi Okada , Sho Hoshino
- 申请人: Isao Chinzei , Masahide Miura , Seiji Nakahigashi , Hiromasa Suzuki , Toshio Yamamoto , Akira Morikawa , Satoru Katoh , Takashi Onozuka , Hirotaka Ori , Mitsuyoshi Okada , Sho Hoshino
- 申请人地址: JP Toyota; JP Toyota; JP Toyota; JP Toyota; JP Nagakute; JP Nagakute; JP Nagakute; JP Kakegawa; JP Kakegawa; JP Kakegawa; JP Kakegawa
- 专利权人: Isao Chinzei,Masahide Miura,Seiji Nakahigashi,Hiromasa Suzuki,Toshio Yamamoto,Akira Morikawa,Satoru Katoh,Takashi Onozuka,Hirotaka Ori,Mitsuyoshi Okada,Sho Hoshino
- 当前专利权人: Isao Chinzei,Masahide Miura,Seiji Nakahigashi,Hiromasa Suzuki,Toshio Yamamoto,Akira Morikawa,Satoru Katoh,Takashi Onozuka,Hirotaka Ori,Mitsuyoshi Okada,Sho Hoshino
- 当前专利权人地址: JP Toyota; JP Toyota; JP Toyota; JP Toyota; JP Nagakute; JP Nagakute; JP Nagakute; JP Kakegawa; JP Kakegawa; JP Kakegawa; JP Kakegawa
- 代理机构: Dickinson Wright, PLLC
- 优先权: JPJP2019-088769 20190509
- 主分类号: F01N3/28
- IPC分类号: F01N3/28 ; B01J35/04
摘要:
The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the atmosphere where the A/F is rich. The present disclosure relates to an exhaust gas purification catalyst including a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal and a metal oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 50 μm to 100 μm; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.5% by volume to 50% by volume of a whole volume of voids, the high-aspect-ratio pore having an equivalent circle diameter in a range from 2 μm to 50 μm in a cross-sectional image of a catalyst coating layer cross section perpendicular to an exhaust gas flow direction of the substrate and having an average aspect ratio in a range from 10 to 50, and wherein when a surface side in contact with an exhaust gas in a thickness direction of the catalyst coating layer is defined as 0% and a side in contact with the substrate is defined as 100%, 80% by mass or more of a total amount of the noble metal is present in a range from 0% to 25% or more and 70% or less.