Several types of nanocatalysts are used across various applications: - Metal Nanoparticles: Commonly used in reactions like hydrogenation and oxidation due to their high activity. - Metal Oxides: Used for environmental applications like pollutant degradation. - Carbon-Based Nanomaterials: Include graphene and carbon nanotubes, utilized for their high conductivity and stability. - Zeolites: Used in petrochemical industries for their porous structure.