CoFe‐P/Ti₃C₂T_x Nanosheets as Efficient Electrocatalyst for the Oxygen Evolution Reaction

Abstract Oxygen evolution reaction (OER) is a crucial step in many sustainable energy technologies. Exploring cost‐effetive electrocatalysts with high efficiency is one of the most critical but challenging problems to overcome the slow reaction rate and high overpotential in OER. Layered double hydroxide (LDH) has excellent OER performance. However, their poor electrical conductivity and easy agglomeration limit their use. Currently, further phosphorizaton or incorporating with conductive substrates is an effective method to improve the OER performance. In this study, a hybrid product denoted as CoFe−P/Ti₃C₂T_x were successfully prepared by facile reflux hydrothermal and phosphorization. The optimized CoFe−P/Ti₃C₂T_x possesses a low overpotential of 270 mV at a current density of 10 mA cm⁻² and a small Tafel slope (57.7 mV dec⁻¹). In addition, an overpotential of 337 mV was needed for affording 50 mA cm⁻² in the 1 M KOH.