Iron–Cobalt Phosphomolybdate with High Electrocatalytic Activity for Oxygen Evolution Reaction

Iron–cobalt phosphomolybdate (FeCoPM₁₂) nanoparticles, which are highly efficient catalytic materials for the oxygen evolution reaction (OER), were fabricated through a coprecipitation route. Compared with iron–cobalt hydroxide and state‐of‐the‐art RuO₂ electrocatalysts, the as‐prepared FeCoPM₁₂ sample exhibited robust OER catalytic activity with a low overpotential of 258 mV at a current density of 10 mA cm^?2 and a small Tafel slope of 33 mV dec^?1. Moreover, the as‐synthesized sample presented preferable stability and after 10 h at 1.52 V the current density degraded by merely 8.3 %. This is ascribed to the high electrochemical stability and small porous structure of FeCoPM₁₂, which provide effective electron transmission and improve the catalytic performance for OER in alkaline media.