In Situ X-ray Absorption Spectroscopy of LaFeO₃ and LaFeO₃/LaNiO₃ Thin Films in the Electrocatalytic Oxygen Evolution Reaction.

ABSTRACT: We study the electrocatalytic oxygen evolution reaction using in situ X-ray absorption spectroscopy (XAS) to track the dynamics of the valence state and the covalence of the metal ions of LaFeO₃ and LaFeO₃/LaNiO₃ thin films. The active materials are 8 unit cells grown epitaxially on 100 nm conductive La_0.67Sr_0.33MnO₃ layers using pulsed laser deposition (PLD). The perovskite layers are supported on monolayer Ca₂Nb₃O₁₀ nanosheet-buffered 100 nm SiN_x membranes. The in situ Fe and Ni K-edges XAS spectra were measured from the backside of the SiN_x membrane using fluorescence yield detection under electrocatalytic reaction conditions. The XAS spectra show signif

SUBMITTER: Che Q 

PROVIDER: S-EPMC11000219 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature