Photodeposition-Based Synthesis of TiO₂@IrO_x Core-Shell Catalyst for Proton Exchange Membrane Water Electrolysis with Low Iridium Loading.

ABSTRACT: The widespread application of green hydrogen production technologies requires cost reduction of crucial elements. To achieve this, a viable pathway to reduce the iridium loading in proton exchange membrane water electrolysis (PEMWE) is explored. Herein, a scalable synthesis method based on a photodeposition process for a TiO₂@IrO_x core-shell catalyst with a reduced iridium content as low as 40 wt.% is presented. Using this synthesis method, titania support particles homogeneously coated with a thin iridium oxide shell of only 2.1 ± 0.4 nm are obtained. The catalyst exhibits not only high ex situ activity, but also decent stability compared to commercially available catalysts. Furthermore, the unique core-shell structure provides a threefold increased electrical powder

SUBMITTER: Hoffmeister D 

PROVIDER: S-EPMC11321668 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature