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Surface Restructuring of Thin-Film Electrodes Based on Thermal History and Its Significance for the Catalytic Activity and Stability at the Gas/Solid and Solid/Solid Interfaces

[Image: see text] Electrodes in solid-state energy devices are subjected to a variety of thermal treatments, from film processing to device operation at high temperatures. All these treatments influence the chemical activity and stability of the films, as the thermally induced chemical restructuring...

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Autores principales: Celikbilek, Ozden, Cavallaro, Andrea, Kerherve, Gwilherm, Fearn, Sarah, Chaix-Pluchery, Odette, Aguadero, Ainara, Kilner, John A., Skinner, Stephen J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7467561/
https://www.ncbi.nlm.nih.gov/pubmed/32627535
http://dx.doi.org/10.1021/acsami.0c08308
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author Celikbilek, Ozden
Cavallaro, Andrea
Kerherve, Gwilherm
Fearn, Sarah
Chaix-Pluchery, Odette
Aguadero, Ainara
Kilner, John A.
Skinner, Stephen J.
author_facet Celikbilek, Ozden
Cavallaro, Andrea
Kerherve, Gwilherm
Fearn, Sarah
Chaix-Pluchery, Odette
Aguadero, Ainara
Kilner, John A.
Skinner, Stephen J.
author_sort Celikbilek, Ozden
collection PubMed
description [Image: see text] Electrodes in solid-state energy devices are subjected to a variety of thermal treatments, from film processing to device operation at high temperatures. All these treatments influence the chemical activity and stability of the films, as the thermally induced chemical restructuring shapes the microstructure and the morphology. Here, we investigate the correlation between the oxygen reduction reaction (ORR) activity and thermal history in complex transition metal oxides, in particular, La(0.6)Sr(0.4)CoO(3−δ) (LSC64) thin films deposited by pulsed laser deposition. To this end, three ∼200 nm thick LSC64 films with different processing and thermal histories were studied. A variety of surface-sensitive elemental characterization techniques (i.e., low-energy ion scattering, X-ray photoelectron spectroscopy, and secondary ion mass spectrometry) were employed to thoroughly investigate the cationic distribution from the outermost surface to the film/substrate interface. Moreover, electrochemical impedance spectroscopy was used to study the activity and the stability of the films. Our investigations revealed that, despite the initial comparable ORR activity at 600 °C, the degradation rates of the films differed by twofold in the long-term stability tests at 500 °C. Here, we emphasize the importance of processing and thermal history in the elemental surface distribution, especially for the stability of LSC64 electrodes and propose that they should be considered as among the main pillars in the design of active surfaces.
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spelling pubmed-74675612020-09-03 Surface Restructuring of Thin-Film Electrodes Based on Thermal History and Its Significance for the Catalytic Activity and Stability at the Gas/Solid and Solid/Solid Interfaces Celikbilek, Ozden Cavallaro, Andrea Kerherve, Gwilherm Fearn, Sarah Chaix-Pluchery, Odette Aguadero, Ainara Kilner, John A. Skinner, Stephen J. ACS Appl Mater Interfaces [Image: see text] Electrodes in solid-state energy devices are subjected to a variety of thermal treatments, from film processing to device operation at high temperatures. All these treatments influence the chemical activity and stability of the films, as the thermally induced chemical restructuring shapes the microstructure and the morphology. Here, we investigate the correlation between the oxygen reduction reaction (ORR) activity and thermal history in complex transition metal oxides, in particular, La(0.6)Sr(0.4)CoO(3−δ) (LSC64) thin films deposited by pulsed laser deposition. To this end, three ∼200 nm thick LSC64 films with different processing and thermal histories were studied. A variety of surface-sensitive elemental characterization techniques (i.e., low-energy ion scattering, X-ray photoelectron spectroscopy, and secondary ion mass spectrometry) were employed to thoroughly investigate the cationic distribution from the outermost surface to the film/substrate interface. Moreover, electrochemical impedance spectroscopy was used to study the activity and the stability of the films. Our investigations revealed that, despite the initial comparable ORR activity at 600 °C, the degradation rates of the films differed by twofold in the long-term stability tests at 500 °C. Here, we emphasize the importance of processing and thermal history in the elemental surface distribution, especially for the stability of LSC64 electrodes and propose that they should be considered as among the main pillars in the design of active surfaces. American Chemical Society 2020-07-06 2020-07-29 /pmc/articles/PMC7467561/ /pubmed/32627535 http://dx.doi.org/10.1021/acsami.0c08308 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Celikbilek, Ozden
Cavallaro, Andrea
Kerherve, Gwilherm
Fearn, Sarah
Chaix-Pluchery, Odette
Aguadero, Ainara
Kilner, John A.
Skinner, Stephen J.
Surface Restructuring of Thin-Film Electrodes Based on Thermal History and Its Significance for the Catalytic Activity and Stability at the Gas/Solid and Solid/Solid Interfaces
title Surface Restructuring of Thin-Film Electrodes Based on Thermal History and Its Significance for the Catalytic Activity and Stability at the Gas/Solid and Solid/Solid Interfaces
title_full Surface Restructuring of Thin-Film Electrodes Based on Thermal History and Its Significance for the Catalytic Activity and Stability at the Gas/Solid and Solid/Solid Interfaces
title_fullStr Surface Restructuring of Thin-Film Electrodes Based on Thermal History and Its Significance for the Catalytic Activity and Stability at the Gas/Solid and Solid/Solid Interfaces
title_full_unstemmed Surface Restructuring of Thin-Film Electrodes Based on Thermal History and Its Significance for the Catalytic Activity and Stability at the Gas/Solid and Solid/Solid Interfaces
title_short Surface Restructuring of Thin-Film Electrodes Based on Thermal History and Its Significance for the Catalytic Activity and Stability at the Gas/Solid and Solid/Solid Interfaces
title_sort surface restructuring of thin-film electrodes based on thermal history and its significance for the catalytic activity and stability at the gas/solid and solid/solid interfaces
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7467561/
https://www.ncbi.nlm.nih.gov/pubmed/32627535
http://dx.doi.org/10.1021/acsami.0c08308
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