Hierarchical iron–nickel oxyhydroxide nanosheets directly grown on porous TiFe2-based intermetallics for robust oxygen evolution

Rationally designing highly active oxygen evolution reaction (OER) electrocatalysts with robust stability is critical for industrial electrochemical water splitting. Hierarchical iron-nickel oxyhydroxide nanosheets directly grown on porous TiFe2-based intermetallics are designed and prepared as OER catalysts. The best-performing nanosheets only need 295 mV to achieve 100 mA cm-2, along with exceptional durability at a high current density of 1000 mA cm-2. This work introduces a scalable strategy for producing robust OER catalysts that have potential for industrial applications.