Catalysts

"Catalysts" can refer to different concepts depending on the context. Here are a few common meanings: 1. **Chemistry**: In chemistry, a catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent change. Catalysts work by providing an alternative pathway for the reaction that has a lower activation energy. They are essential in many industrial processes, such as the production of ammonia through the Haber process or in catalytic converters in vehicles that help reduce harmful emissions.