Engineering hierarchical porous carbon-supported Fe-doped cobalt phosphides from MOF templates for alkaline water oxidation

Abstract

A MOF-on-MOF strategy is utilized to synthesize Fe-doped cobalt phosphide nanoparticles within a porous N-doped carbon matrix (S-CoFeP). Detailed characterization confirms the successful formation of Co₂P as the primary phase, with Fe incorporated as a beneficial dopant. S-CoFeP exhibits exceptional OER performance in alkaline media, achieving a small overpotential of 234 mV at 10 mA cm⁻² and satisfactory durability for over 70 hours.