Role of Electrolyte pH on Water Oxidation for Iridium Oxides.

ABSTRACT: Understanding the effect of noncovalent interactions of intermediates at the polarized catalyst-electrolyte interface on water oxidation kinetics is key for designing more active and stable electrocatalysts. Here, we combine operando optical spectroscopy, X-ray absorption spectroscopy (XAS), and surface-enhanced infrared absorption spectroscopy (SEIRAS) to probe the effect of noncovalent interactions on the oxygen evolution reaction (OER) activity of IrO_x in acidic and alkaline electrolytes. Our results suggest that the active species for the OER (Ir^4.x+-*O) binds much stronger in alkaline compared with acid at low coverage, while the repulsive interactions between these species are higher in alkaline electrolytes. These differences are attributed to the

SUBMITTER: Liang C 

PROVIDER: S-EPMC10996014 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature