Perovskite oxides such as ferrites have been widely investigated for their remarkable electrochemical activity as SOFC electrodes. However, their phase instability in reducing conditions remains an issue for anode application. The role of Mn substitution into B-site of La0.6Sr0.4FeO3-delta (LSF) perovskite oxide was investigated. New insights on the structural evolution of La0.6Sr0.4Fe0.8Mn0.2O3-delta (LSFMn) upon high temperature reduction were revealed. In oxidizing atmosphere, Mn substitution reduces the oxygen vacancy concentration while, switching to reducing conditions, it drives the transition from rhombohedral perovskite to single Ruddlesden-Popper phase, affecting the Fe-0 exsolution. Redox-cycles of LSFMn were investigated and the properties of re-oxidized compounds were highlighted. The effect of Mn substitution on perovskite conductivity was also evaluated both in oxidizing and reducing conditions.

(2020). The role of manganese substitution on the redox behavior of La0.6Sr0.4Fe0.8Mn0.2O3-delta [journal article - articolo]. In JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. Retrieved from http://hdl.handle.net/10446/163206

The role of manganese substitution on the redox behavior of La0.6Sr0.4Fe0.8Mn0.2O3-δ

Natali Sora, Isabella;
2020

Abstract

Perovskite oxides such as ferrites have been widely investigated for their remarkable electrochemical activity as SOFC electrodes. However, their phase instability in reducing conditions remains an issue for anode application. The role of Mn substitution into B-site of La0.6Sr0.4FeO3-delta (LSF) perovskite oxide was investigated. New insights on the structural evolution of La0.6Sr0.4Fe0.8Mn0.2O3-delta (LSFMn) upon high temperature reduction were revealed. In oxidizing atmosphere, Mn substitution reduces the oxygen vacancy concentration while, switching to reducing conditions, it drives the transition from rhombohedral perovskite to single Ruddlesden-Popper phase, affecting the Fe-0 exsolution. Redox-cycles of LSFMn were investigated and the properties of re-oxidized compounds were highlighted. The effect of Mn substitution on perovskite conductivity was also evaluated both in oxidizing and reducing conditions.
articolo
Duranti, L.; Natali Sora, I.; Zurlo, F.; Luisetto, I.; Licoccia, S.; Di Bartolomeo, E.
(2020). The role of manganese substitution on the redox behavior of La0.6Sr0.4Fe0.8Mn0.2O3-delta [journal article - articolo]. In JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. Retrieved from http://hdl.handle.net/10446/163206
File allegato/i alla scheda:
File Dimensione del file Formato  
20_JEurCeramSoc.pdf

Solo gestori di archivio

Versione: publisher's version - versione editoriale
Licenza: Licenza default Aisberg
Dimensione del file 4.64 MB
Formato Adobe PDF
4.64 MB Adobe PDF   Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

Aisberg ©2008 Servizi bibliotecari, Università degli studi di Bergamo | Terms of use/Condizioni di utilizzo

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/163206
Citazioni
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 9
social impact