Several nanomaterials have shown promise for ORR, including:
Platinum-based Nanoparticles: Despite their high cost, Pt-based nanoparticles are widely used due to their excellent catalytic activity. Transition Metal Oxides: Materials like manganese oxide (MnOx) and cobalt oxide (Co3O4) offer good catalytic properties at a lower cost. Carbon-based Nanomaterials:Graphene, carbon nanotubes, and carbon nanofibers are excellent supports and can be functionalized to enhance ORR. Metal-Nitrogen-Carbon (M-N-C) Catalysts: These materials, where metal atoms are coordinated with nitrogen and embedded in a carbon matrix, show high ORR activity and stability.
