Details
| Original language | English |
|---|---|
| Article number | 1123 |
| Journal | Membranes |
| Volume | 12 |
| Issue number | 11 |
| Publication status | Published - 9 Nov 2022 |
Abstract
High-entropy perovskite oxides have already been studied in various fields owing to their high-entropy-induced properties. Partial substitution of an element by a lower valence element usually improves the oxygen permeability of perovskite oxides, but high substitution amounts may lead to structural instability. In this work, pure high-entropy perovskites Pr (Formula presented.)Sr x(Cr,Mn,Fe,Co,Ni)O (Formula presented.) with high amounts Sr up to (Formula presented.) were synthesized via a sol–gel method. Several characterization methods prove that the solubility of Sr increases with higher temperatures of the heating treatment. The ceramic with (Formula presented.) shows a transition from semi-conductive to metallic behavior when the temperature reaches 873 K. Its oxygen flux is comparable to the low-entropy counterpart La 0.6Sr 0.4Co 0.5Fe 0.5O (Formula presented.). A stable run of ca. 46.2 h was documented for oxygen permeation under an air/CO 2 gradient.
Keywords
- high-entropy oxide, mixed ionic–electronic conducting membrane, oxygen separation, perovskite, sol–gel synthesis
ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemical Engineering (miscellaneous)
- Chemical Engineering(all)
- Process Chemistry and Technology
- Chemical Engineering(all)
- Filtration and Separation
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In: Membranes, Vol. 12, No. 11, 1123, 09.11.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High-Entropy Perovskites Pr1−xSrx(Cr,Mn,Fe,Co,Ni)O3−δ (x = 0–0.5): Synthesis and Oxygen Permeation Properties
AU - Zhao, Zhijun
AU - Rehder, Lena
AU - Steinbach, Frank
AU - Feldhoff, Armin
N1 - Funding Information: This research was funded by the Deutsche Forschungsgemeinschaft (DFG, German Re- search Foundation)—project number 435833397.
PY - 2022/11/9
Y1 - 2022/11/9
N2 - High-entropy perovskite oxides have already been studied in various fields owing to their high-entropy-induced properties. Partial substitution of an element by a lower valence element usually improves the oxygen permeability of perovskite oxides, but high substitution amounts may lead to structural instability. In this work, pure high-entropy perovskites Pr (Formula presented.)Sr x(Cr,Mn,Fe,Co,Ni)O (Formula presented.) with high amounts Sr up to (Formula presented.) were synthesized via a sol–gel method. Several characterization methods prove that the solubility of Sr increases with higher temperatures of the heating treatment. The ceramic with (Formula presented.) shows a transition from semi-conductive to metallic behavior when the temperature reaches 873 K. Its oxygen flux is comparable to the low-entropy counterpart La 0.6Sr 0.4Co 0.5Fe 0.5O (Formula presented.). A stable run of ca. 46.2 h was documented for oxygen permeation under an air/CO 2 gradient.
AB - High-entropy perovskite oxides have already been studied in various fields owing to their high-entropy-induced properties. Partial substitution of an element by a lower valence element usually improves the oxygen permeability of perovskite oxides, but high substitution amounts may lead to structural instability. In this work, pure high-entropy perovskites Pr (Formula presented.)Sr x(Cr,Mn,Fe,Co,Ni)O (Formula presented.) with high amounts Sr up to (Formula presented.) were synthesized via a sol–gel method. Several characterization methods prove that the solubility of Sr increases with higher temperatures of the heating treatment. The ceramic with (Formula presented.) shows a transition from semi-conductive to metallic behavior when the temperature reaches 873 K. Its oxygen flux is comparable to the low-entropy counterpart La 0.6Sr 0.4Co 0.5Fe 0.5O (Formula presented.). A stable run of ca. 46.2 h was documented for oxygen permeation under an air/CO 2 gradient.
KW - high-entropy oxide
KW - mixed ionic–electronic conducting membrane
KW - oxygen separation
KW - perovskite
KW - sol–gel synthesis
UR - http://www.scopus.com/inward/record.url?scp=85144818716&partnerID=8YFLogxK
U2 - 10.3390/membranes12111123
DO - 10.3390/membranes12111123
M3 - Article
VL - 12
JO - Membranes
JF - Membranes
IS - 11
M1 - 1123
ER -