Answer:
catalytic converter
Explanation:
A heterogeneous catalyst is one that has a phase different from the reactant molecules. A catalyst speeds up a chemical reaction by lowering the activation energy required to start the reaction. But a catalyst does not undergo any change in the chemical process. Catalysts in a catalytic converter are metallic palladium or platinum that react with the hydrocarbons and carbon monoxide from the exhausts of a car to form carbon dioxide and water.
