Partial Exsolution Enables Superior Bifunctionality of Ir@SrIrO₃ for Acidic Overall Water Splitting.

ABSTRACT: The pursuit of efficient and durable bifunctional electrocatalysts for overall water splitting in acidic media is highly desirable, albeit challenging. SrIrO₃ based perovskites are electrochemically active for oxygen evolution reaction (OER), however, their inert activities toward hydrogen evolution reaction (HER) severely restrict the practical implementation in overall water splitting. Herein, an Ir@SrIrO₃ heterojunction is newly developed by a partial exsolution approach, ensuring strong metal-support interaction for OER and HER. Notably, the Ir@SrIrO₃-175 electrocatalyst, prepared by annealing SrIrO₃ in 5% H₂ atmosphere at 175 °C, delivers ultralow overpotentials of 229 mV at 10 mA cm^-2 for OER and 28 mV at 10 mA cm

SUBMITTER: Zhao L 

PROVIDER: S-EPMC11199977 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature