Title:
EXHAUST PURIFICATION CATALYST
Document Type and Number:
WIPO Patent Application WO/2016/158656
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an exhaust purification catalyst, wherein a means capable of maintaining catalytic performance even after long-term use is provided. The present invention relates to an exhaust purification catalyst comprising an upper layer and a lower layer, wherein the lower layer has a ceria-zirconia composite oxide containing at least one rare-earth element and further has another ceria-zirconia composite oxide, and the ceria-zirconia composite oxide containing at least one rare-earth element contains at least one rare earth element selected from the group consisting of lanthanum, yttrium, and praseodymium, in the amount of 0.1 to 4.0 atom% with respect to the total amount of cerium and zirconium in the ceria-zirconia composite oxide, and contains 90 atom% or more of the total amount of the at least one rare-earth element in a near-surface area within 50 nm from the surfaces of primary particles of the ceria-zirconia composite oxide.
Inventors:
SUZUKI HIROMASA (JP)
YOSHIDA TAKERU (JP)
MIURA MASAHIDE (JP)
AOKI YUKI (JP)
CHINZEI ISAO (JP)
MORIKAWA AKIRA (JP)
TANABE TOSHITAKA (JP)
SUDA AKIHIKO (JP)
KONISHI KAE (JP)
TANAKA YUKI (JP)
ORI HIROTAKA (JP)
OHASHI TATSUYA (JP)
CHIBA AKIYA (JP)
IIZUKA KOSUKE (JP)
YOSHIDA TAKERU (JP)
MIURA MASAHIDE (JP)
AOKI YUKI (JP)
CHINZEI ISAO (JP)
MORIKAWA AKIRA (JP)
TANABE TOSHITAKA (JP)
SUDA AKIHIKO (JP)
KONISHI KAE (JP)
TANAKA YUKI (JP)
ORI HIROTAKA (JP)
OHASHI TATSUYA (JP)
CHIBA AKIYA (JP)
IIZUKA KOSUKE (JP)
Application Number:
PCT/JP2016/059353
Publication Date:
October 06, 2016
Filing Date:
March 24, 2016
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
CATALER CORP (JP)
SUZUKI HIROMASA (JP)
YOSHIDA TAKERU (JP)
MIURA MASAHIDE (JP)
AOKI YUKI (JP)
CHINZEI ISAO (JP)
MORIKAWA AKIRA (JP)
TANABE TOSHITAKA (JP)
SUDA AKIHIKO (JP)
KONISHI KAE (JP)
TANAKA YUKI (JP)
ORI HIROTAKA (JP)
OHASHI TATSUYA (JP)
CHIBA AKIYA (JP)
IIZUKA KOSUKE (JP)
CATALER CORP (JP)
SUZUKI HIROMASA (JP)
YOSHIDA TAKERU (JP)
MIURA MASAHIDE (JP)
AOKI YUKI (JP)
CHINZEI ISAO (JP)
MORIKAWA AKIRA (JP)
TANABE TOSHITAKA (JP)
SUDA AKIHIKO (JP)
KONISHI KAE (JP)
TANAKA YUKI (JP)
ORI HIROTAKA (JP)
OHASHI TATSUYA (JP)
CHIBA AKIYA (JP)
IIZUKA KOSUKE (JP)
International Classes:
B01J27/053; B01D53/94; B01J35/04; B01J37/02; F01N3/10; F01N3/28
Foreign References:
| JP2013220401A | 2013-10-28 | |||
| JP2011219329A | 2011-11-04 | |||
| JP2004337840A | 2004-12-02 | |||
| JP2014114180A | 2014-06-26 | |||
| JP2010188302A | 2010-09-02 | |||
| JP2015024381A | 2015-02-05 | |||
| JP2015000818A | 2015-01-05 | |||
| JP2015071520A | 2015-04-16 |
Attorney, Agent or Firm:
HIRAKI Yusuke et al. (JP)
Yusuke Hiraki (JP)
Yusuke Hiraki (JP)
Download PDF:
Previous Patent: ROTATIONAL ELECTRONIC COMPONENT AND ROTATION ENCODER
Next Patent: ROTARY ELECTRONIC COMPONENT, AND ROTARY ENCODER
Next Patent: ROTARY ELECTRONIC COMPONENT, AND ROTARY ENCODER