{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Riedl C"],"funding":["Österreichische Forschungsförderungsgesellschaft","Austrian Science Fund FWF"],"pagination":["142-153"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9768847"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["25(1)"],"pubmed_abstract":["La<sub>0.6</sub>Sr<sub>0.4</sub>FeO<sub>3-<i>δ</i></sub> (LSF) electrodes were grown on different electrolyte substrates by pulsed laser deposition (PLD) and their oxygen exchange reaction (OER) resistance was tracked in real-time by <i>in situ</i> PLD impedance spectroscopy (i-PLD) inside the PLD chamber. This enables measurements on pristine surfaces free from any contaminations and the direct observation of thickness dependent properties. As substrates, yttria-stabilized zirconia single crystals (YSZ) were used for polycrystalline LSF growth and La<sub>0.95</sub>Sr<sub>0.05</sub>Ga<sub>0.95</sub>Mg<sub>0.05</sub>O<sub>3-<i>δ</i></sub> (LSGM) single crystals or YSZ single crystals with a 5 nm buffer-layer of Gd<sub>0.2</sub>Ce<sub>0.8</sub>O<sub>2-<i>δ</i></sub> for epitaxial LSF film growth. While polycrystalline LSF electrodes show a constant OER resistance in a broad thickness range, epitaxially grown LSF electrodes exhibit a continuous and strong increase of the OER resistance with film thickness until ≈60 nm. In addition, the activation energy of the OER resistance increases by 0.23 eV compared to polycrystalline LSF. High resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) measurements reveal an increasing contraction of the out-of-plane lattice parameter in the epitaxial LSF electrodes over electrode thickness. Defect thermodynamic simulations suggest that the decrease of the LSF unit cell volume is accompanied by a lowering of the oxygen vacancy concentration, explaining both the resistive increase and the increased activation energy."],"journal":["Physical chemistry chemical physics : PCCP"],"pubmed_title":["<i>In situ</i> electrochemical observation of anisotropic lattice contraction of La<sub>0.6</sub>Sr<sub>0.4</sub>FeO<sub>3-<i>δ</i></sub> electrodes during pulsed laser deposition."],"pmcid":["PMC9768847"],"funding_grant_id":["P31654 – N37","P31165 – N37","865864"],"pubmed_authors":["Limbeck A","Siebenhofer M","Opitz AK","Riedl C","Raznjevic S","Zhang Z","Fleig J","Bumberger AE","Kubicek M"],"additional_accession":[]},"is_claimable":false,"name":"<i>In situ</i> electrochemical observation of anisotropic lattice contraction of La<sub>0.6</sub>Sr<sub>0.4</sub>FeO<sub>3-<i>δ</i></sub> electrodes during pulsed laser deposition.","description":"La<sub>0.6</sub>Sr<sub>0.4</sub>FeO<sub>3-<i>δ</i></sub> (LSF) electrodes were grown on different electrolyte substrates by pulsed laser deposition (PLD) and their oxygen exchange reaction (OER) resistance was tracked in real-time by <i>in situ</i> PLD impedance spectroscopy (i-PLD) inside the PLD chamber. This enables measurements on pristine surfaces free from any contaminations and the direct observation of thickness dependent properties. As substrates, yttria-stabilized zirconia single crystals (YSZ) were used for polycrystalline LSF growth and La<sub>0.95</sub>Sr<sub>0.05</sub>Ga<sub>0.95</sub>Mg<sub>0.05</sub>O<sub>3-<i>δ</i></sub> (LSGM) single crystals or YSZ single crystals with a 5 nm buffer-layer of Gd<sub>0.2</sub>Ce<sub>0.8</sub>O<sub>2-<i>δ</i></sub> for epitaxial LSF film growth. While polycrystalline LSF electrodes show a constant OER resistance in a broad thickness range, epitaxially grown LSF electrodes exhibit a continuous and strong increase of the OER resistance with film thickness until ≈60 nm. In addition, the activation energy of the OER resistance increases by 0.23 eV compared to polycrystalline LSF. High resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) measurements reveal an increasing contraction of the out-of-plane lattice parameter in the epitaxial LSF electrodes over electrode thickness. Defect thermodynamic simulations suggest that the decrease of the LSF unit cell volume is accompanied by a lowering of the oxygen vacancy concentration, explaining both the resistive increase and the increased activation energy.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Dec","modification":"2025-04-04T10:59:01.919Z","creation":"2025-04-04T10:59:01.919Z"},"accession":"S-EPMC9768847","cross_references":{"pubmed":["36476841"],"doi":["10.1039/d2cp04977e"]}}