Enhancing Industrial Oxygen Evolution Reaction Activity and Corrosion Resistance through Multielement Synergy of FeCoNiOx-MOF

Metal-organic framework (MOF) materials have been widely used for water electrolysis with their high-quality structural features and many active sites, while the corrosion resistance of the industrial oxygen evolution reaction (OER) anode is a significant challenge in water electrolysis for hydrogen production. We prepared a series of MOF materials (FeOx-MOF, CoOx-MOF, NiOx-MOF, FeNiOx-MOF, FeCoOx-MOF, CoNiOx-MOF, and FeCoNiOx-MOF) by doping transition metals Fe, Co, and Ni as polymetallic elements. As an OER catalyst, FeCoNiOx-MOF exhibits the best electrocatalytic activity with an overpotential of 290 mV at 10 mA cm –2 current density among all the materials. It exhibits superior catalytic activity compared to RuO 2 . In addition, the current density and stability of FeCoNiOx-MOF are superior to those of CoNiOx-MOF and CoOx-MOF under the same constant potential (1.57 V vs RHE) conditions. Within 48 h, the corrosion current density change of FeCoNiOx-MOF (15.0%) was significantly lower than that of industrial-grade nickel foam (30.0%) in the same group, indicating a significant improvement in corrosion resistance, which may be attributed to the synergistic effect of multiple elements in FeCoNiOx-MOF. This study prepared a multielement FeCoNiOx-MOF with enhanced OER activity and corrosion resistance, providing a partial theoretical basis for its industrial applications.