Porphyrin‐based NiFe Porous Organic Polymer Catalysts for the Oxygen Evolution Reaction

Abstract Porphyrin‐based NiFe porous organic polymers (POPs) have been synthesized with good porosity and large BET surface areas (261 to 313 m 2 g −1 ). These bimetallic POPs exhibit RuO 2 ‐like OER activity, with the reaction for catalyst FeTAPP‐NiTCPP‐POP reaching a current density of 10 mA cm −2 at a low overpotential of 338 mV and with a small Tafel slope of 52 mV dec −1 . FeTAPP‐NiTCPP‐POP was stable over a long period under reaction conditions. These bimetallic POPs exhibit better catalytic activity than their monometallic counterparts, due to synergetic interactions between the iron and nickel centers to facilitate the electrocatalytic process.