Iron-Doped Monoclinic Strontium Iridate as a Highly Efficient Oxygen Evolution Electrocatalyst in Acidic Media.

ABSTRACT: Ir-based perovskite oxides are efficient electrocatalysts for anodic oxygen evolution. This work presents a systematic study of the doping effects of Fe on the OER activity of monoclinic SrIrO₃ to reduce the consumption of Ir. The monoclinic structure of SrIrO₃ was retained when the Fe/Ir ratio was less than 0.1/0.9. Upon further increases in the Fe/Ir ratio, the structure of SrIrO₃ changed from a 6H to 3C phase. The SrFe_0.1Ir_0.9O₃ had the highest activity among the investigated catalysts with the lowest overpotential of 238 mV at 10 mA cm^-2 in 0.1 M HClO₄ solution, which could be attributed to the oxygen vacancies induced by the Fe dopant and the IrOx formed upon the dissolution of Sr and Fe. The forma

SUBMITTER: Li M 

PROVIDER: S-EPMC10005387 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature