Ferrocene and Nitrogen‐Rich Triazine Linked Porous Organic Polymers for Efficient and Durable Oxygen Evolution Electrocatalysis

ABSTRACT

As the rate‐determining step in water splitting and related energy systems, the oxygen evolution reaction (OER) demonstrates a main challenge due to its sluggish intrinsic kinetics. Herein, we report, for the first time, the application of ferrocene‐integrated porous organic polymers (POPs) supported on nickel foam (NF) as a high‐performance electrocatalyst for the OER, exhibiting catalytic activity and efficiency. The Fer‐TPT‐Ph POP electrocatalyst demonstrates outstanding OER performance under alkaline conditions, requiring a low overpotential of 276 mV to achieve 10 mA cm ⁻² and 380 mV at 50 mA cm ⁻² , with a Tafel slope of 78 mV dec ⁻¹ , indicating faster OER kinetics than Fer‐TPT POP. Furthermore, the Fer‐TPT‐Ph POP maintained a nearly constant potential during 48 h of chronoamperometry operation at 10 mA cm ⁻² , thereby confirming its durability under extended OER operation. Electrochemical results show that the improved OER performance of Fer‐TPT‐Ph POP was accompanied by a lower charge‐transfer resistance of 81 Ω, compared with 177 Ω for Fer‐TPT POP. The outlined work shows a pioneering effort in the development and exploration of Fer‐based POPs in electrocatalysis, marking a significant advance in the field of energy‐related catalysis.