Enhancing Iridium Nanoparticles’ Oxygen Evolution Reaction Activity and Stability by Adjusting the Coverage of Titanium Oxynitride Flakes on Reduced Graphene Oxide Nanoribbons’ Support
A carbon-ceramic nanocomposite of Ir nanoparticles and TiONx flakes on reduced graphene oxide nanoribbons delivers up to 30× higher OER activity than commercial IrO₂. Performance is driven by heterojunction formation between the three phases — demonstrating that morphology and particle distribution can unlock strong synergistic effects in iridium catalysts.