To provide an inorganic oxide by which the particle growth of a carried metal (e.g., rhodium) is sufficiently suppressed, a catalyst carrier for purifying exhaust comprising such inorganic oxide, and a catalyst for purifying exhaust using it.
The inorganic oxide is in the form of particles and contains an aluminum oxide, a metal oxide not forming a composite oxide with such aluminum oxide, and an additional element comprising at least either a rare earth element and an alkaline earth element, wherein the proportion (in terms of the amount of the oxide) of the additional element contained is 1.5 to 5.6 mol.% with relation to the total amount of the additional element, the aluminum, and the above metal oxide, 80% or more of primary particles of the inorganic oxide has a particle size of 100 nm or less, and at least a part of primary particles have a surface concentrated region where the proportion of the additional element contained is locally increased in such surface layer part.
TANABE TOSHITAKA
YAMAMURA YOSHIE
TAKAHASHI NAOKI
SUZUKI HIROMASA
KUNO HISASHI
SATO AKEMI
ISHIKIRIYAMA MAMORU
KANAZAWA TAKAAKI
TOYOTA MOTOR CORP
| JPH10202102A | 1998-08-04 | |||
| JP2002204956A | 2002-07-23 | |||
| JP3498453B2 | 2004-02-16 | |||
| JP3275356B2 | 2002-04-15 | |||
| JPH10202102A | 1998-08-04 | |||
| JP2002204956A | 2002-07-23 | |||
| JP3498453B2 | 2004-02-16 | |||
| JP3275356B2 | 2002-04-15 |
| WO2001017680A1 | 2001-03-15 | |||
| WO2001017680A1 | 2001-03-15 |
Shiro Terasaki