Effects of Nb and Sn co-doping on the structure and properties of SrCoO3-δ oxygen transport membranes
The structure and oxygen permeability of SrCo0.9-xNb0.1SnxO3–δ (x = 0, 0.03, and 0.05) perovskite membranes were systematically investigated by co-doping the B-site of SrCoO3–δ oxide with Nb and Sn. Combined X-ray and neutron diffraction experiments showed that all materials crystallized in the tetr...
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Online Access: | http://dx.doi.org/10.1080/21870764.2020.1756066 |
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doaj-9de3eb9a16844ebbb23577b3a4eff4d52021-05-02T17:50:27ZengTaylor & Francis GroupJournal of Asian Ceramic Societies2187-07642020-04-018251952710.1080/21870764.2020.17560661756066Effects of Nb and Sn co-doping on the structure and properties of SrCoO3-δ oxygen transport membranesJong Hyun Park0Young A. Lee1Ji Haeng Yu2June Hyuk Lee3Hana Yoon4Younghyun Cho5Chung-Yul Yoo6Korea Institute of Energy ResearchKorea Institute of Energy ResearchKorea Institute of Energy ResearchKorea Atomic Energy Research InstituteKorea Institute of Energy ResearchSoonchunhyang UniversityMokpo National UniversityThe structure and oxygen permeability of SrCo0.9-xNb0.1SnxO3–δ (x = 0, 0.03, and 0.05) perovskite membranes were systematically investigated by co-doping the B-site of SrCoO3–δ oxide with Nb and Sn. Combined X-ray and neutron diffraction experiments showed that all materials crystallized in the tetragonal P4/mmm space group and that the crystal structures approached the ideal cubic perovskite structure with increasing Sn concentration. In addition, X-ray photoelectron spectra confirmed that Sn-doping increases the (Co, Nb, Sn)-O bond strengths. The impact of Sn-doping on the oxygen transport of dense SrCo0.9-xNb0.1SnxO3–δ membranes was also investigated, under air/He gradient, as a function of both temperature and membrane thickness. The results showed that the oxygen transport of SrCo0.9Nb0.1O3–δ is governed by oxygen ion diffusion, while the oxygen surface exchange reaction is the limiting process for the Sn-doped membranes, SrCo0.87Nb0.1Sn0.03O3–δ and SrCo0.85Nb0.1Sn0.05O3–δ.http://dx.doi.org/10.1080/21870764.2020.1756066perovskitesneutron powder diffractionx-ray photoelectron spectroscopyoxygen permeationco-doping |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jong Hyun Park Young A. Lee Ji Haeng Yu June Hyuk Lee Hana Yoon Younghyun Cho Chung-Yul Yoo |
spellingShingle |
Jong Hyun Park Young A. Lee Ji Haeng Yu June Hyuk Lee Hana Yoon Younghyun Cho Chung-Yul Yoo Effects of Nb and Sn co-doping on the structure and properties of SrCoO3-δ oxygen transport membranes Journal of Asian Ceramic Societies perovskites neutron powder diffraction x-ray photoelectron spectroscopy oxygen permeation co-doping |
author_facet |
Jong Hyun Park Young A. Lee Ji Haeng Yu June Hyuk Lee Hana Yoon Younghyun Cho Chung-Yul Yoo |
author_sort |
Jong Hyun Park |
title |
Effects of Nb and Sn co-doping on the structure and properties of SrCoO3-δ oxygen transport membranes |
title_short |
Effects of Nb and Sn co-doping on the structure and properties of SrCoO3-δ oxygen transport membranes |
title_full |
Effects of Nb and Sn co-doping on the structure and properties of SrCoO3-δ oxygen transport membranes |
title_fullStr |
Effects of Nb and Sn co-doping on the structure and properties of SrCoO3-δ oxygen transport membranes |
title_full_unstemmed |
Effects of Nb and Sn co-doping on the structure and properties of SrCoO3-δ oxygen transport membranes |
title_sort |
effects of nb and sn co-doping on the structure and properties of srcoo3-δ oxygen transport membranes |
publisher |
Taylor & Francis Group |
series |
Journal of Asian Ceramic Societies |
issn |
2187-0764 |
publishDate |
2020-04-01 |
description |
The structure and oxygen permeability of SrCo0.9-xNb0.1SnxO3–δ (x = 0, 0.03, and 0.05) perovskite membranes were systematically investigated by co-doping the B-site of SrCoO3–δ oxide with Nb and Sn. Combined X-ray and neutron diffraction experiments showed that all materials crystallized in the tetragonal P4/mmm space group and that the crystal structures approached the ideal cubic perovskite structure with increasing Sn concentration. In addition, X-ray photoelectron spectra confirmed that Sn-doping increases the (Co, Nb, Sn)-O bond strengths. The impact of Sn-doping on the oxygen transport of dense SrCo0.9-xNb0.1SnxO3–δ membranes was also investigated, under air/He gradient, as a function of both temperature and membrane thickness. The results showed that the oxygen transport of SrCo0.9Nb0.1O3–δ is governed by oxygen ion diffusion, while the oxygen surface exchange reaction is the limiting process for the Sn-doped membranes, SrCo0.87Nb0.1Sn0.03O3–δ and SrCo0.85Nb0.1Sn0.05O3–δ. |
topic |
perovskites neutron powder diffraction x-ray photoelectron spectroscopy oxygen permeation co-doping |
url |
http://dx.doi.org/10.1080/21870764.2020.1756066 |
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