What is the role of a catalytic converter in a car?

@unique 

The role of a catalytic converter in a car is to reduce the harmful emissions produced by the combustion engine. It is a key component of the vehicle's exhaust system. The catalytic converter contains a catalyst, usually composed of platinum, palladium, and rhodium, which facilitates chemical reactions to convert harmful pollutants into less harmful substances.

Specifically, the catalytic converter helps to reduce three main pollutants:

1. Carbon monoxide (CO): It converts CO, a poisonous gas, into carbon dioxide (CO2), which is less harmful.
2. Nitrogen oxides (NOx): It reduces NOx emissions by converting nitrogen oxide (NO) into nitrogen (N2) and oxygen (O2).
3. Hydrocarbons (HC) and volatile organic compounds (VOCs): It breaks down unburned hydrocarbons and VOCs into carbon dioxide (CO2) and water (H2O).

By catalyzing these reactions, the catalytic converter significantly reduces the emissions of harmful pollutants from the vehicle's exhaust, helping to minimize air pollution and improve overall air quality.