Details
| Original language | English |
|---|---|
| Article number | 100781 |
| Number of pages | 9 |
| Journal | Open Ceramics |
| Volume | 22 |
| Early online date | 21 Apr 2025 |
| Publication status | Published - Jun 2025 |
Abstract
The tendency of mixed ionic electronic conducting (MIEC) materials to be highly selective towards oxygen allows for their use as oxygen transport membranes (OTMs). To be used as OTMs in plasma assisted CO2 conversion and H2 utilisation applications, requires high oxygen permeability, structural stability against reducing atmospheres (such as CO2, CO, H2, etc.) and suitable mechanical properties. La0.6Ca0.4Co1–xFexO3–d (LCCF) has already shown excellent tolerance against CO2 and recently, in our previous work, its specific variant, La0.6Ca0.4Co0.2Fe0.8O3–d (LCCF_6428) showcased hydrogen tolerance for upto 25 hours at 600 °C. In this work, we aim to further improve the hydrogen tolerance of LCCF_6428 by the introduction of strong Mn4+-O bonds into the material structure. To achieve this, 10 % Fe was substituted with manganese (Mn) at the B site of LCCF_6428. The resulting composition La0.6Ca0.4Co0.2Fe0.7Mn0.1O3–d (LCCF_64271) was chosen and synthesized with ultrasonic spray synthesis (USS). The presence of strong Mn4+-O bonds led to a two-fold increase in the hydrogen tolerance of the membrane material with respect to LCCF_6428 with a slight 5 % decrease in oxygen permeability.
Keywords
- CO conversion, H tolerance, H utilisation, Oxygen permeation, Oxygen transport membranes, Plasma technology, X-ray photoelectron spectroscopy
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Materials Science(all)
- Ceramics and Composites
- Materials Science(all)
- Biomaterials
- Materials Science(all)
- Materials Chemistry
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In: Open Ceramics, Vol. 22, 100781, 06.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Enhancing the hydrogen tolerance of La0.6Ca0.4Co0.2Fe0.8O3–d oxygen transport membranes with the substitution of 10 % Mn at the B site for plasma assisted CO2 conversion
AU - Rashid, Aasir
AU - Thiem, Moritz
AU - Wellmann, Merle
AU - Bresser, Marc
AU - Lindemann, Olaf
AU - Wiegers, Katharina Sophia
AU - Hofmann, Jan Philipp
AU - Schulz, Andreas
AU - Feldhoff, Armin
AU - Weidenkaff, Anke
AU - Widenmeyer, Marc
N1 - Publisher Copyright: © 2025 The Author(s)
PY - 2025/6
Y1 - 2025/6
N2 - The tendency of mixed ionic electronic conducting (MIEC) materials to be highly selective towards oxygen allows for their use as oxygen transport membranes (OTMs). To be used as OTMs in plasma assisted CO2 conversion and H2 utilisation applications, requires high oxygen permeability, structural stability against reducing atmospheres (such as CO2, CO, H2, etc.) and suitable mechanical properties. La0.6Ca0.4Co1–xFexO3–d (LCCF) has already shown excellent tolerance against CO2 and recently, in our previous work, its specific variant, La0.6Ca0.4Co0.2Fe0.8O3–d (LCCF_6428) showcased hydrogen tolerance for upto 25 hours at 600 °C. In this work, we aim to further improve the hydrogen tolerance of LCCF_6428 by the introduction of strong Mn4+-O bonds into the material structure. To achieve this, 10 % Fe was substituted with manganese (Mn) at the B site of LCCF_6428. The resulting composition La0.6Ca0.4Co0.2Fe0.7Mn0.1O3–d (LCCF_64271) was chosen and synthesized with ultrasonic spray synthesis (USS). The presence of strong Mn4+-O bonds led to a two-fold increase in the hydrogen tolerance of the membrane material with respect to LCCF_6428 with a slight 5 % decrease in oxygen permeability.
AB - The tendency of mixed ionic electronic conducting (MIEC) materials to be highly selective towards oxygen allows for their use as oxygen transport membranes (OTMs). To be used as OTMs in plasma assisted CO2 conversion and H2 utilisation applications, requires high oxygen permeability, structural stability against reducing atmospheres (such as CO2, CO, H2, etc.) and suitable mechanical properties. La0.6Ca0.4Co1–xFexO3–d (LCCF) has already shown excellent tolerance against CO2 and recently, in our previous work, its specific variant, La0.6Ca0.4Co0.2Fe0.8O3–d (LCCF_6428) showcased hydrogen tolerance for upto 25 hours at 600 °C. In this work, we aim to further improve the hydrogen tolerance of LCCF_6428 by the introduction of strong Mn4+-O bonds into the material structure. To achieve this, 10 % Fe was substituted with manganese (Mn) at the B site of LCCF_6428. The resulting composition La0.6Ca0.4Co0.2Fe0.7Mn0.1O3–d (LCCF_64271) was chosen and synthesized with ultrasonic spray synthesis (USS). The presence of strong Mn4+-O bonds led to a two-fold increase in the hydrogen tolerance of the membrane material with respect to LCCF_6428 with a slight 5 % decrease in oxygen permeability.
KW - CO conversion
KW - H tolerance
KW - H utilisation
KW - Oxygen permeation
KW - Oxygen transport membranes
KW - Plasma technology
KW - X-ray photoelectron spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=105003375757&partnerID=8YFLogxK
U2 - 10.1016/j.oceram.2025.100781
DO - 10.1016/j.oceram.2025.100781
M3 - Article
AN - SCOPUS:105003375757
VL - 22
JO - Open Ceramics
JF - Open Ceramics
M1 - 100781
ER -