Surface coatings play a crucial role in extending the lifespan of catalysts and improving their efficiency. They can protect catalysts from poisons, such as sulfur or chlorine, which can deactivate the catalytic sites. Additionally, coatings can improve the thermal stability of catalysts, enabling them to operate at higher temperatures without losing activity. Furthermore, surface coatings can enhance the selectivity of a catalyst, directing the reaction towards desired products while minimizing unwanted by-products.
