Lattice Oxygen Exchange in Rutile IrO2 during the Oxygen Evolution Reaction.

ABSTRACT: The development of efficient acidic water electrolyzers relies on understanding dynamic changes of the Ir-based catalytic surfaces during the oxygen evolution reaction (OER). Such changes include degradation, oxidation, and amorphization processes, each of which somehow affects the material's catalytic performance and durability. Some mechanisms involve the release of oxygen atoms from the oxide's lattice, the extent of which is determined by the structure of the catalyst. While the stability of hydrous Ir oxides suffers from the active participation of lattice oxygen atoms in the OER, rutile IrO2 is more stable and the lattice oxygen involvement is still under debate due to the insufficient sensitivity of commonly used online electrochemical mass spectrometry. Here, we revisit the case of

SUBMITTER: Schweinar K 

PROVIDER: S-EPMC7341534 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature