CATALYST FOR CLARIFYING EXHAUST GAS AND METHOD FOR PREPARATION THEREOF, AND EXHAUST GAS CLARIFICATI

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A purification catalyst for exhaust gas enhances the activities of the precious metals, preventing drop of activities at high temperature, and exhibiting a sufficient performance even during low temperature (below 400°C) operation when starting a vehicle or during idling. The Pd oxide is supported on the Al oxide, and the Al oxide is LnAlO3 (Ln : rare-earth element).