Nanoparticle catalysts can be categorized based on their composition and structure:
Metal Nanoparticles: These include platinum, gold, and palladium nanoparticles, often used in hydrogenation and oxidation reactions. Metal Oxide Nanoparticles: Examples are titanium dioxide and cerium oxide, which are used in photocatalysis and redox reactions. Bimetallic Nanoparticles: These consist of two different metals, such as platinum-palladium, to combine the catalytic properties of both metals. Core-Shell Nanoparticles: These have a core material coated by another material, offering a combination of properties from both materials.