Why do cars use two types of catalysts carrier?

1. Balancing high-temperature resistance and rapid start-up: Ceramic catalysts are suitable for high-speed and long-term high-temperature operation, while metal catalysts are suitable for cold starts and low-temperature operation.

2. Optimizing exhaust gas purification efficiency: The combination of the two materials can achieve the best exhaust gas purification effect under different temperatures and driving conditions.

3. Extended lifespan and reliability: The toughness of the metal catalyst can protect the brittle ceramic catalyst, reducing the risk of breakage.