Heat Resistant Oxygen Storage Material ACZ

The Precious Metal Particle Diameter and the Crystal Diameter of CZ in Two Catalysts Catalyst A Contained 1.5g/dm3 Pt, 0.35 g/dm3 Rh with CZ and Catalyst Contained the Same Amount of Precious Metals with ACZ 

These catalysts were aged under the exhaust gas stream at 900°C for 100 h. Catalyst A contained 1.5 g/dm3 Pt, 0.35 g/dm3 Rh with CZ and Catalyst contained the same amount of precious metals with ACZ. As shown in the table, both the sintering of the precious metals and the CZ particles is inhibited in Catalyst compared with Catalyst A. Table III also shows the light-off temperature of those catalysts. The light-off temperature of Catalyst is about 15°C lower than that of Catalyst A. In addition, the NOx emission of a vehicle equipped with Catalyst was about 20% less than that with Catalyst A. 

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