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公开(公告)号:US11426710B2
公开(公告)日:2022-08-30
申请号:US17088767
申请日:2020-11-04
发明人: Takahiro Nishio , Shogo Shirakawa , Masahide Miura , Isao Chinzei , Seiji Nakahigashi , Norimichi Shimano , Hiromi Togashi , Hiroki Nihashi , Mitsuyoshi Okada , Takashi Onozuka , Souta Akiyama , Isao Naito
摘要: The present disclosure relates to an exhaust gas control catalyst including a base and a catalyst coating layer having a two-layer structure on the base. The catalyst coating layer includes a lower layer on the base, and an upper layer on the lower layer. The upper layer of the catalyst coating layer contains Rh particles in which a mean particle diameter measured by observation using a transmission electron microscope is 1.0 nm or more and 2.0 nm or less and a particle-diameter standard deviation σ is 0.8 nm or less. A length of the upper layer from an end face on a downstream side in an exhaust gas flow direction falls within a range of 70% or more and 100% or less of a total length of the base.