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Role of Fe/Co Ratio in Dual Phase Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) Composites for Oxygen Separation

Dual-phase membranes are increasingly attracting attention as a solution for developing stable oxygen permeation membranes. Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) (CGO-F(3−x)CxO) composites are one group of promising candidates. This study aims to understand the effect of the Fe/Co-ratio, i.e., x = 0...

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Autores principales: Fischer, Liudmila, Ran, Ke, Schmidt, Christina, Neuhaus, Kerstin, Baumann, Stefan, Behr, Patrick, Mayer, Joachim, Bouwmeester, Henny J. M., Nijmeijer, Arian, Guillon, Olivier, Meulenberg, Wilhelm A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223710/
https://www.ncbi.nlm.nih.gov/pubmed/37233543
http://dx.doi.org/10.3390/membranes13050482
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author Fischer, Liudmila
Ran, Ke
Schmidt, Christina
Neuhaus, Kerstin
Baumann, Stefan
Behr, Patrick
Mayer, Joachim
Bouwmeester, Henny J. M.
Nijmeijer, Arian
Guillon, Olivier
Meulenberg, Wilhelm A.
author_facet Fischer, Liudmila
Ran, Ke
Schmidt, Christina
Neuhaus, Kerstin
Baumann, Stefan
Behr, Patrick
Mayer, Joachim
Bouwmeester, Henny J. M.
Nijmeijer, Arian
Guillon, Olivier
Meulenberg, Wilhelm A.
author_sort Fischer, Liudmila
collection PubMed
description Dual-phase membranes are increasingly attracting attention as a solution for developing stable oxygen permeation membranes. Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) (CGO-F(3−x)CxO) composites are one group of promising candidates. This study aims to understand the effect of the Fe/Co-ratio, i.e., x = 0, 1, 2, and 3 in Fe(3−x)Co(x)O(4), on microstructure evolution and performance of the composite. The samples were prepared using the solid-state reactive sintering method (SSRS) to induce phase interactions, which determines the final composite microstructure. The Fe/Co ratio in the spinel structure was found to be a crucial factor in determining phase evolution, microstructure, and permeation of the material. Microstructure analysis showed that all iron-free composites had a dual-phase structure after sintering. In contrast, iron-containing composites formed additional phases with a spinel or garnet structure which likely contributed to electronic conductivity. The presence of both cations resulted in better performance than that of pure iron or cobalt oxides. This demonstrated that both types of cations were necessary to form a composite structure, which then allowed sufficient percolation of robust electronic and ionic conducting pathways. The maximum oxygen flux is j(O2) = 0.16 and 0.11 mL/cm(2)·s at 1000 °C and 850 °C, respectively, of the 85CGO-FC2O composite, which is comparable oxygen permeation flux reported previously.
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spelling pubmed-102237102023-05-28 Role of Fe/Co Ratio in Dual Phase Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) Composites for Oxygen Separation Fischer, Liudmila Ran, Ke Schmidt, Christina Neuhaus, Kerstin Baumann, Stefan Behr, Patrick Mayer, Joachim Bouwmeester, Henny J. M. Nijmeijer, Arian Guillon, Olivier Meulenberg, Wilhelm A. Membranes (Basel) Article Dual-phase membranes are increasingly attracting attention as a solution for developing stable oxygen permeation membranes. Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) (CGO-F(3−x)CxO) composites are one group of promising candidates. This study aims to understand the effect of the Fe/Co-ratio, i.e., x = 0, 1, 2, and 3 in Fe(3−x)Co(x)O(4), on microstructure evolution and performance of the composite. The samples were prepared using the solid-state reactive sintering method (SSRS) to induce phase interactions, which determines the final composite microstructure. The Fe/Co ratio in the spinel structure was found to be a crucial factor in determining phase evolution, microstructure, and permeation of the material. Microstructure analysis showed that all iron-free composites had a dual-phase structure after sintering. In contrast, iron-containing composites formed additional phases with a spinel or garnet structure which likely contributed to electronic conductivity. The presence of both cations resulted in better performance than that of pure iron or cobalt oxides. This demonstrated that both types of cations were necessary to form a composite structure, which then allowed sufficient percolation of robust electronic and ionic conducting pathways. The maximum oxygen flux is j(O2) = 0.16 and 0.11 mL/cm(2)·s at 1000 °C and 850 °C, respectively, of the 85CGO-FC2O composite, which is comparable oxygen permeation flux reported previously. MDPI 2023-04-29 /pmc/articles/PMC10223710/ /pubmed/37233543 http://dx.doi.org/10.3390/membranes13050482 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Fischer, Liudmila
Ran, Ke
Schmidt, Christina
Neuhaus, Kerstin
Baumann, Stefan
Behr, Patrick
Mayer, Joachim
Bouwmeester, Henny J. M.
Nijmeijer, Arian
Guillon, Olivier
Meulenberg, Wilhelm A.
Role of Fe/Co Ratio in Dual Phase Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) Composites for Oxygen Separation
title Role of Fe/Co Ratio in Dual Phase Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) Composites for Oxygen Separation
title_full Role of Fe/Co Ratio in Dual Phase Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) Composites for Oxygen Separation
title_fullStr Role of Fe/Co Ratio in Dual Phase Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) Composites for Oxygen Separation
title_full_unstemmed Role of Fe/Co Ratio in Dual Phase Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) Composites for Oxygen Separation
title_short Role of Fe/Co Ratio in Dual Phase Ce(0.8)Gd(0.2)O(2−δ)–Fe(3−x)Co(x)O(4) Composites for Oxygen Separation
title_sort role of fe/co ratio in dual phase ce(0.8)gd(0.2)o(2−δ)–fe(3−x)co(x)o(4) composites for oxygen separation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223710/
https://www.ncbi.nlm.nih.gov/pubmed/37233543
http://dx.doi.org/10.3390/membranes13050482
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