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Platinum began to be used in catalytic converters in the late 1970s, specifically around 1975. This was part of efforts to reduce harmful emissions from vehicles, as platinum acts as an effective catalyst in the chemical reactions that convert toxic gases into less harmful substances. The introduction of platinum was significant in the development of three-way catalytic converters, which became standard in many vehicles.

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3mo ago

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Seeing as this is in the car section....if this question is to see if its possible to extract the tiny amount of platinum from the ceramic lattice inside stolen catalytic converters, the answer is; you dont. Aside from destroying someone else's property by stealing the converter off their car, you will probably start a house fire trying to do it.