16. October 2025
Probing the Intrinsic Oxygen Evolution Kinetics at Single CoFe2O4 Nano-Catalysts
Hatem M.A. Amin, Mahnaz Azimzadeh Sani, Abdelilah El Arrassi, Sascha Saddeler, Stephan Schulz, Kristina Tschulik
Oxygen Evolution Reaction (OER) Kinetics at the Nanoscale: Intrinsic OER kinetics of CoFe2O4 nano-catalysts were quantified at the single-particle level using nano-impact electrochemistry and compared with densely packed ensembles, where conductivity, particles heterogeneity, interparticle interactions, and diffusion limitations could obscure true activity. This method enables diffusion-free Tafel analysis and offers a robust platform to benchmark nanoscale OER catalysts.