There are several methods for chemically modifying catalysts, including:
1. Doping: Introducing foreign atoms into the catalyst structure to alter its electronic properties. 2. Substitution: Replacing specific atoms or groups within the catalyst to change its reactivity. 3. Functionalization: Adding functional groups to the surface of the catalyst to improve its interaction with reactants. 4. Post-Synthetic Modification: Altering the catalyst after its initial synthesis, often used for modifying MOFs (Metal-Organic Frameworks).