COMPLEX OXIDE, METHOD FOR PRODUCING SAME, AND EXHAUST GAS PURIFICATION CATALYST

WIPO Patent Application WO/2012/165362

A1

Provided are: a complex oxide that exhibits high redox ability even at low temperatures, has superior heat resistance, and stably maintains the characteristics thereof even when repeating oxidation/reduction at a high temperature; a method for producing the complex oxide; and an exhaust gas purification catalyst. The complex oxide contains over 0 and no greater than 20 parts by mass of Si in terms of SiO2 for every total of 100 parts by mass in terms of the oxides of rare earth metal elements including Ce, and performing a temperature-programmed reduction (TPR) measurement from 50°C to 900°C at a rate of temperature rise of 10°C/minute in a 10% hydrogen, 90% argon atmosphere and then performing oxidation processing for 0.5 hours at 500°C, has the characteristic of exhibiting a reduction rate of at least 1.5% at 400°C or under calculated from the results of performing the TPR measurement again.

OHTAKE NAOTAKA (JP)
MITSUOKA KEIICHIRO (JP)
YOKOTA KAZUHIKO (CN)

PCT/JP2012/063586

December 06, 2012

May 28, 2012

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RHODIA OPERATIONS (FR)
OHTAKE NAOTAKA (JP)
MITSUOKA KEIICHIRO (JP)
YOKOTA KAZUHIKO (CN)

B01J23/10; B01D53/86; F01N3/10

JPS6256322A	1987-03-12
JPH09118610A	1997-05-06
JPH06210174A	1994-08-02
JP2010530343A	2010-09-09
JP2003238159A	2003-08-27
JP2005085137A	2005-03-31
JP2005281021A	2005-10-13
JP2010260023A	2010-11-18
JP2008156219A	2008-07-10
JPH04214026A	1992-08-05
JP2000072437A	2000-03-07
JPH05270824A	1993-10-19

JOURNAL OF CATALYSIS, vol. 194, 2000, pages 461 - 478
See also references of EP 2716361A4

SAKAI Hajime et al. (JP)
Sakai 1 (JP)

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