Microwave-Assisted Synthesis of IrNi Electrocatalysts for the Oxygen Evolution Reaction in Acidic Electrolyte.

ABSTRACT: This study investigates a microwave-assisted synthesis method for producing IrNi bimetallic catalysts for the oxygen evolution reaction in acidic environment. Due to the high cost of iridium-based catalysts used in the anodes of proton-exchange membrane electrolyzers, reducing the noble metal content while maintaining high performance is crucial. In this work, materials with various IrNi atomic ratios are synthesized and their impact on the catalyst microstructure, phase composition, and electrochemical performance is evaluated. The results reveal a synergistic effect between the two metals, with 60 at% Ni identified as the optimal nominal composition. This catalyst achieves an overpotential of 274 mV at 10 mA cm^-2 and a Tafel slope of 49 mV dec^-1 in 0.5 M H_2</

SUBMITTER: Cardone AG 

PROVIDER: S-EPMC12598801 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature