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Journal of The Electrochemical Society· 2026Q1

Balancing Iridium Loading and Catalyst Layer Thickness in TiO <sub>x</sub> -Based Anodes for Polymer Electrolyte Water Electrolysis

Zarina Turtayeva, Tina Saillard, Juan Herranz, Félix N. Büchi

Short summary

This research establishes that optimizing polymer electrolyte water electrolysis (PEWE) anodes requires balancing iridium (Ir) loading, catalyst layer (CL) thickness, and microstructural connectivity. Intermediate Ir content catalysts (30-45 wt%) offer the most practical route to scalable, low-Ir electrodes.

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Field: Renewable Energy, Sustainability and the Environment

Renewable Energy, Sustainability and the EnvironmentEnergy