Auto catalysts, also known as automotive catalytic converters, are critical components in modern vehicles designed to reduce harmful emissions from internal combustion engines. With increasing global emphasis on environmental sustainability and stringent emission regulations, auto catalysts have become indispensable in controlling air pollution and supporting cleaner transportation.

The primary function of an auto catalyst is to convert harmful exhaust gases such as carbon monoxide (CO), nitrogen oxides (NOx), and unburned hydrocarbons (HC) into less harmful substances like carbon dioxide (CO₂), nitrogen (N₂), and water vapor (H₂O). This transformation occurs through chemical reactions facilitated by precious metal catalysts—typically platinum, palladium, and rhodium—coated onto ceramic or metallic substrates within the converter. By efficiently reducing toxic emissions, auto catalysts play a pivotal role in improving air quality and safeguarding public health.