Reactivity and Stability of Reduced Ir-Weight TiO₂-Supported Oxygen Evolution Catalysts for Proton Exchange Membrane (PEM) Water Electrolyzer Anodes.

ABSTRACT: Reducing the iridium demand in Proton Exchange Membrane Water Electrolyzers (PEM WE) is a critical priority for the green hydrogen industry. This study reports the discovery of a TiO₂-supported Ir@IrO(OH)_x core-shell nanoparticle catalyst with reduced Ir content, which exhibits superior catalytic performance for the electrochemical oxygen evolution reaction (OER) compared to a commercial reference. The TiO₂-supported Ir@IrO(OH)_x core-shell nanoparticle configuration significantly enhances the OER Ir mass activity from 8 to approximately 150 A g_Ir^-1 at 1.53 V_RHE while reducing the iridium packing density from 1.6 to below 0.77 g_Ir cm^-3. These advancements allow for viable anode l

SUBMITTER: Tran HP 

PROVIDER: S-EPMC11583366 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature