Enhanced oxygen evolution catalysis via trimetallic MOF-derived NiCoFeP/N-rGO nanocomposites

The advancement of water-splitting technologies, notably the oxygen evolution reaction (OER), is critically reliant on developing robust, efficient, and stable electrocatalysts derived from plentiful metals. In the present work, a composite material, NiCoFeP/N-doped reduced graphene oxide (rGO), derived from a trimetallic-organic framework (MOF), was synthesized through a hydrothermal process followed by calcination and phosphorization. The precursor, NiCoFe-MOF/GO, was created by integrating graphene oxide, which was thermally reduced to rGO. The electrocatalytic efficiency of the NiCoFeP/N-rGO composite was evaluated in 1 M potassium hydroxide solution, exhibiting a remarkably low overpotential of only 340 mV at a current density of 10 mA per cm 2 and a low Tafel slope of 74 mV per decade, surpassing the commercial catalyst RuO 2 performance. Long-term testing revealed the catalyst's robust stability; it sustained its performance without degradation for 48 h. This work provides a valuable pathway for generating efficient multimetallic MOF-based electrocatalysts, contributing to the growth of sustainable energy solutions.