Compositional engineering of perovskite oxides for highly efficient oxygen reduction reactions
Mixed conducting perovskite oxides are promising catalysts for high-temperature oxygen reduction reaction. Pristine SrCoO3−δ is a widely used parent oxide for the development of highly active mixed conductors. Doping a small amount of redox-inactive cation into the B site (Co site) of SrCoO3−δ has b...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
American Chemical Society
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/38198 |
| _version_ | 1848755255671521280 |
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| author | Chen, D. Chen, C. Zhang, Z. Baiyee, Z. Ciucci, F. Shao, Zongping |
| author_facet | Chen, D. Chen, C. Zhang, Z. Baiyee, Z. Ciucci, F. Shao, Zongping |
| author_sort | Chen, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Mixed conducting perovskite oxides are promising catalysts for high-temperature oxygen reduction reaction. Pristine SrCoO3−δ is a widely used parent oxide for the development of highly active mixed conductors. Doping a small amount of redox-inactive cation into the B site (Co site) of SrCoO3−δ has been applied as an effective way to improve physicochemical properties and electrochemical performance. Most findings however are obtained only from experimental observations, and no universal guidelines have been proposed. In this article, combined experimental and theoretical studies are conducted to obtain fundamental understanding of the effect of B-site doping concentration with redox-inactive cation (Sc) on the properties and performance of the perovskite oxides. The phase structure, electronic conductivity, defect chemistry, oxygen reduction kinetics, oxygen ion transport, and electrochemical reactivity are experimentally characterized. In-depth analysis of doping level effect is also undertaken by first-principles calculations. Among the compositions, SrCo0.95Sc0.05O3−δ shows the best oxygen kinetics and corresponds to the minimum fraction of Sc for stabilization of the oxygen-vacancy-disordered structure. The results strongly support that B-site doping of SrCoO3−δ with a small amount of redox-inactive cation is an effective strategy toward the development of highly active mixed conducting perovskites for efficient solid oxide fuel cells and oxygen transport membranes. |
| first_indexed | 2025-11-14T08:53:24Z |
| format | Journal Article |
| id | curtin-20.500.11937-38198 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:53:24Z |
| publishDate | 2015 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-381982017-09-13T14:13:45Z Compositional engineering of perovskite oxides for highly efficient oxygen reduction reactions Chen, D. Chen, C. Zhang, Z. Baiyee, Z. Ciucci, F. Shao, Zongping Mixed conducting perovskite oxides are promising catalysts for high-temperature oxygen reduction reaction. Pristine SrCoO3−δ is a widely used parent oxide for the development of highly active mixed conductors. Doping a small amount of redox-inactive cation into the B site (Co site) of SrCoO3−δ has been applied as an effective way to improve physicochemical properties and electrochemical performance. Most findings however are obtained only from experimental observations, and no universal guidelines have been proposed. In this article, combined experimental and theoretical studies are conducted to obtain fundamental understanding of the effect of B-site doping concentration with redox-inactive cation (Sc) on the properties and performance of the perovskite oxides. The phase structure, electronic conductivity, defect chemistry, oxygen reduction kinetics, oxygen ion transport, and electrochemical reactivity are experimentally characterized. In-depth analysis of doping level effect is also undertaken by first-principles calculations. Among the compositions, SrCo0.95Sc0.05O3−δ shows the best oxygen kinetics and corresponds to the minimum fraction of Sc for stabilization of the oxygen-vacancy-disordered structure. The results strongly support that B-site doping of SrCoO3−δ with a small amount of redox-inactive cation is an effective strategy toward the development of highly active mixed conducting perovskites for efficient solid oxide fuel cells and oxygen transport membranes. 2015 Journal Article http://hdl.handle.net/20.500.11937/38198 10.1021/acsami.5b00358 American Chemical Society restricted |
| spellingShingle | Chen, D. Chen, C. Zhang, Z. Baiyee, Z. Ciucci, F. Shao, Zongping Compositional engineering of perovskite oxides for highly efficient oxygen reduction reactions |
| title | Compositional engineering of perovskite oxides for highly efficient oxygen reduction reactions |
| title_full | Compositional engineering of perovskite oxides for highly efficient oxygen reduction reactions |
| title_fullStr | Compositional engineering of perovskite oxides for highly efficient oxygen reduction reactions |
| title_full_unstemmed | Compositional engineering of perovskite oxides for highly efficient oxygen reduction reactions |
| title_short | Compositional engineering of perovskite oxides for highly efficient oxygen reduction reactions |
| title_sort | compositional engineering of perovskite oxides for highly efficient oxygen reduction reactions |
| url | http://hdl.handle.net/20.500.11937/38198 |