Iridium-Based Mixed Transition Metal Oxide (Ir₃MO_x, M = Ni, Co, Fe) Incorporated in the Conducting Layer as an Electrocatalyst for Boosting the Oxygen Evolution Reaction.

ABSTRACT: Ir₃MO_x@CMI (M = Ni, Co, Fe) electrocatalysts are explored for the oxygen evolution reaction by embedding Ir₃MO_x within carbon matrix islands (CMIs) in direct contact with a titanium porous transport layer. Structural and compositional analyses reveal that incorporating transition metals not only enhances Ir particle dispersion but also modifies the morphology. The unique hierarchical structure of the Ir₃MO_x@CMI electrocatalyst improves its intrinsic OER activity and durability under severe acidic conditions. Among the electrocatalysts, Ir₃CoO_x@CMI demonstrates the highest intrinsic OER activity, achieving an overpotential of 233 mV at 10 mA cm^-2, alongside a minimal charge transfer resistance

SUBMITTER: Huynh TBN 

PROVIDER: S-EPMC12393016 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature