👉 Kathodes are a type of metal that is used in catalytic converters, which are devices that convert harmful gases into harmless gases. Cathodes are composed of a semiconductor material, such as tungsten or indium tin oxide (ITO), and are typically shaped like a sphere or disk. The cathode is the part of the converter that converts the harmful gas, such as nitrogen oxides, sulfur dioxide, and carbon monoxide, into a less toxic byproduct, such as water vapor and
