Answer:
Platinum is used as a catalytic converter
Step-by-step explanation:
At present, internal combustion vehicles are equipped with an element called catalytic converter, which is one of the most important components for the control of emissions of polluting gases resulting from combustion produced by engines. Its main function is to transform the polluting gases resulting from the burning of fuel into other gases that are more environmentally friendly. This element is located under the vehicle along the exhaust system pipe after the oxygen sensor.
There are different types of catalytic converters, but modern vehicles are equipped with three-way catalytic converters, referring to the three kinds of pollutant gases that must be reduced (CO, HC and NOX). The converter uses two types of catalysts, one of reduction and another of oxidation. Both consist of a ceramic structure covered with normally platinum, rhodium and palladium metal. The main idea was to create a structure that exposes the catalyst surface to the maximum against the flow of exhaust gases, also minimizing the amount of catalyst required since it is very expensive.