Electrocatalysts can be broadly categorized into two types: homogeneous and heterogeneous.
- Homogeneous Electrocatalysts: These are catalysts that are in the same phase as the reactants, usually in a dissolved state. Transition metal complexes are common examples. - Heterogeneous Electrocatalysts: These catalysts are in a different phase than the reactants, often solid materials like metal nanoparticles on conductive supports. Common materials include platinum, palladium, and nickel.
