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How is platinum used to help regulate the relase of harmful gases from cars?

Platinum is used in catalytic converters to help reduce the emission of harmful gases from cars. Catalytic converters are devices that convert pollutants in the exhaust gas of internal combustion engines into less harmful substances. Platinum is a catalyst, which means it speeds up the chemical reactions that occur in the catalytic converter without being consumed in the process.

The catalytic converter is located in the exhaust system of a car. It contains a ceramic honeycomb structure that is coated with a thin layer of platinum and other metals. When the exhaust gases pass through the catalytic converter, the platinum helps to convert the harmful pollutants into less harmful substances.

The main pollutants that are reduced by catalytic converters are:

* Carbon monoxide (CO)

* Nitrogen oxides (NOx)

* Hydrocarbons (HC)

Catalytic converters are very effective in reducing the emission of harmful gases from cars. They have helped to improve air quality in many cities around the world.

In addition to platinum, other metals that are used in catalytic converters include palladium and rhodium. These metals are also catalysts, and they help to speed up the chemical reactions that occur in the catalytic converter.

The amount of platinum used in catalytic converters varies depending on the size and type of car. A typical catalytic converter contains between 2 and 5 grams of platinum.

Platinum is a valuable metal, and the price of platinum has a significant impact on the cost of catalytic converters. The price of platinum has fluctuated significantly over the past few years. This has led to some automakers looking for alternative materials to use in catalytic converters.