Activated chemical bonds in nanoporous and amorphous iridium oxides favor low overpotential for oxygen evolution reaction.

ABSTRACT: To date, the search for active, selective, and stable electrocatalysts for the oxygen evolution reaction (OER) has not ceased and a detailed atomic-level design of the OER catalyst remains an outstanding (if not, compelling) problem. Considerable studies on different surfaces and polymorphs of iridium oxides (with varying stoichiometries and dopants) have emerged over the years, showing much higher OER activity than the conventionally reported rutile-type IrO₂. Here, we have considered different metastable nanoporous and amorphous iridium oxides of different chemical stoichiometries. Using first-principles electronic structure calculations, we investigate the (electro)chemical stability, intercalation properties, and electronic structure of these iridium oxides. Using an empiric

SUBMITTER: Lee S 

PROVIDER: S-EPMC9177587 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature