Atomistic Insights into Activation and Degradation of La_0.6Sr_0.4CoO_3-δ Electrocatalysts under Oxygen Evolution Conditions.

ABSTRACT: The stability of perovskite oxide catalysts for the oxygen evolution reaction (OER) plays a critical role in their applicability in water splitting concepts. Decomposition of perovskite oxides under applied potential is typically linked to cation leaching and amorphization of the material. However, structural changes and phase transformations at the catalyst surface were also shown to govern the activity of several perovskite electrocatalysts under applied potential. Hence, it is crucial for the rational design of durable perovskite catalysts to understand the interplay between the formation of active surface phases and stability limitations under OER conditions. In the present study, we reveal a surface-dominated activation and deactivation mechanism of the prominent electrocatalyst La

SUBMITTER: Weber ML 

PROVIDER: S-EPMC9545157 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature