Progress of 3D Graphene-Based Electrocatalytic Oxygen Evolution Reaction Catalysts

Electrocatalytic water splitting is a clean and feasible method for hydrogen production, expected to become a key technology for meeting clean energy demands. Transition metal-based nanoparticles, including single-atom catalysts and their compounds, are widely used in electrocatalytic water splitting, but they often suffer from issues like easy agglomeration and poor conductivity. The integration of these nanoparticles with three-dimensional (3D) graphene enhances conductivity and prevents agglomeration, while improving the adsorption and desorption rates of reactants and intermediates on the catalyst surface during electrocatalytic water splitting, thereby boosting energy efficiency. This paper reviews the preparation methods of graphene-based supported electrocatalysts and their applications in oxygen evolution reactions (OERs), further discussing the mechanism by which 3D graphene improves OER performance.