To reduce different types of emissions. Catalytic converters use different precious metals to catalyze different chemical reactions. For example, rhodium is used to reduce nitrogen oxide (NOx) emissions, while platinum and palladium are used to oxidize unburned hydrocarbons (HC) and carbon monoxide (CO) emissions.

How long can a new catalytic converter be used in a car?A new catalytic converter can be used in a car for around 10 years or 100,000 miles, on average. However, the exact lifespan can vary depending on a number of factors.

A catalytic converter is an essential component of a vehicle's exhaust system that helps to reduce the emissions of harmful pollutants such as carbon monoxide, nitrogen oxides, and hydrocarbons. It achieves this by using a series of chemical reactions to convert these pollutants into less harmful substances before they are released into the atmosphere.