Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Catalytic converters are typically comprised of a ceramic substrate coated with a very small amount of platinum group metal (PGM) catalyst. The idea is to maximize the surface area of the catalyst that comes into contact with the exhaust gas passing through the substrate so as to minimize the amount of PGM required, as it is very expensive.
