| abstract |
PROBLEM TO BE SOLVED: To provide exhaust gas that has sufficiently high oxidation activity for CO, HC, etc. at low temperature and maintains sufficiently high oxidation activity for CO, HC, etc. even when exposed to exhaust gas containing high temperature and sulfur components. To provide a purification catalyst. A support comprising alumina, yttria, and titania, and a noble metal supported on the support, Based on the total amount of alumina, yttria and titania in the carrier, the yttria content is 0.7 to 35% by mass, the titania content is 0.3 to 24% by mass, and the alumina content is 50 to 50%. 98% by weight, and The content ratio of the yttria and the titania in the carrier is in the range of 90:10 to 20:80 based on the atomic ratio of each metal element ([yttrium]: [titanium]). An exhaust gas purification catalyst characterized by that. [Selection figure] None |