Crystal-Orientation-Dependent Oxygen Exchange Kinetics on Mixed Conducting Thin-Film Surfaces Investigated by In Situ Studies.

ABSTRACT: The oxygen exchange kinetics and the surface chemistry of epitaxially grown, dense La_0.6Sr_0.4CoO_3-δ (LSC) thin films in three different orientations, (001), (110), and (111), were investigated by means of in situ impedance spectroscopy during pulsed laser deposition (i-PLD) and near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS). i-PLD measurements showed that pristine LSC surfaces exhibit very fast surface exchange kinetics but revealed no significant differences between the specific orientations. However, as soon as the surfaces were in contact with acidic, gaseous impurities, such as S-containing compounds in nominally pure measurement atmospheres, NAP-XPS measurements revealed that the (001) orientation is substantially more suscepti

SUBMITTER: Siebenhofer M 

PROVIDER: S-EPMC10301866 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature