Positive feedback in catalysis can occur through several pathways:
- Autocatalysis: Here, one of the products of the reaction acts as a catalyst, further accelerating the reaction. This is common in certain polymerization reactions. - Promoters: Certain reaction intermediates can act as promoters, enhancing the activity of the primary catalyst. For example, in the Haber-Bosch process for ammonia synthesis, small amounts of alkali metal promoters can significantly enhance the efficiency of iron catalysts.
