Invention Grant
- Patent Title: Ceria-zirconia-based composite oxide and method for producing same, and catalyst for exhaust gas purification including ceria-zirconia-based composite oxide
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Application No.: US14897940Application Date: 2014-06-12
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Publication No.: US09931614B2Publication Date: 2018-04-03
- Inventor: Akira Morikawa , Kae Konishi , Toshitaka Tanabe , Akihiko Suda , Masahide Miura , Hiromasa Suzuki , Isao Chinzei , Akiya Chiba , Kosuke Iizuka
- Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA , CATALER CORPORATION
- Applicant Address: JP Toyota-shi, Aichi-ken JP Kakegawa-shi, Shizuoka-ken
- Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA,CATALER CORPORATION
- Current Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA,CATALER CORPORATION
- Current Assignee Address: JP Toyota-shi, Aichi-ken JP Kakegawa-shi, Shizuoka-ken
- Agency: Sughrue Mion, PLLC
- Priority: JP2013-124311 20130613
- International Application: PCT/IB2014/001038 WO 20140612
- International Announcement: WO2014/199219 WO 20141218
- Main IPC: B01J23/10
- IPC: B01J23/10 ; B01J37/16 ; C01G25/00 ; B01J37/00 ; B01J37/12
Abstract:
A ceria-zirconia-based composite oxide including a composite oxide containing ceria and zirconia, wherein the ceria-zirconia-based composite oxide contains at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium in an amount of 0.5 to 5.0 mol % relative to a total amount of the cations contained in the ceria-zirconia-based composite oxide, where the ratio of the content of both cerium and the at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium in the ceria-zirconia-based composite oxide to the content of zirconium therein ([cerium and the at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium]:[zirconium]) is in the range of 43:57 to 48:52 by mole ratio.
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