Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-dperovskite cathodes
The creation of A-site cation defects within a perovskite oxide can substantially alter the structure and properties of its stoichiometric analogue. In this work, we demonstrate that by vacating 2 and 5% of A-site cations from SrNb0.1Co0.9O3−δ (SNC1.00) perovskites (Sr1−sNb0.1Co0.9O3−δ, s = 0.02 and...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
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Royal Society of Chemistry
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/27773 |
| _version_ | 1848752355609149440 |
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| author | Zhu, Y. Lin, Y. Shen, X. Sunarso, J. Zhou, W. Jiang, S. Su, D. Chen, F. Shao, Zongping |
| author_facet | Zhu, Y. Lin, Y. Shen, X. Sunarso, J. Zhou, W. Jiang, S. Su, D. Chen, F. Shao, Zongping |
| author_sort | Zhu, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The creation of A-site cation defects within a perovskite oxide can substantially alter the structure and properties of its stoichiometric analogue. In this work, we demonstrate that by vacating 2 and 5% of A-site cations from SrNb0.1Co0.9O3−δ (SNC1.00) perovskites (Sr1−sNb0.1Co0.9O3−δ, s = 0.02 and 0.05; denoted as SNC0.98 and SNC0.95, respectively), a Jahn–Teller (JT) distortion with varying extents takes place, leading to the formation of a modified crystal lattice within a the perovskite framework. Electrical conductivity, electrochemical performance, chemical compatibility and microstructure of Sr1−sNb0.1Co0.9O3−δ as cathodes for solid oxide fuel cells were evaluated. Among SNC1.00, SNC0.98 and SNC0.95, SNC0.95 (P4/mmm symmetry (#123)) which exhibits a large JT distortion in conjunction with charge-ordering of cobalt (Co) shows the best oxygen reduction reaction (ORR) activity at low temperature while SNC0.98 (P4mm symmetry (#99)), which displays a local JT distortion, shows the poorest performance. |
| first_indexed | 2025-11-14T08:07:18Z |
| format | Journal Article |
| id | curtin-20.500.11937-27773 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:07:18Z |
| publishDate | 2014 |
| publisher | Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-277732017-09-13T15:11:56Z Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-dperovskite cathodes Zhu, Y. Lin, Y. Shen, X. Sunarso, J. Zhou, W. Jiang, S. Su, D. Chen, F. Shao, Zongping The creation of A-site cation defects within a perovskite oxide can substantially alter the structure and properties of its stoichiometric analogue. In this work, we demonstrate that by vacating 2 and 5% of A-site cations from SrNb0.1Co0.9O3−δ (SNC1.00) perovskites (Sr1−sNb0.1Co0.9O3−δ, s = 0.02 and 0.05; denoted as SNC0.98 and SNC0.95, respectively), a Jahn–Teller (JT) distortion with varying extents takes place, leading to the formation of a modified crystal lattice within a the perovskite framework. Electrical conductivity, electrochemical performance, chemical compatibility and microstructure of Sr1−sNb0.1Co0.9O3−δ as cathodes for solid oxide fuel cells were evaluated. Among SNC1.00, SNC0.98 and SNC0.95, SNC0.95 (P4/mmm symmetry (#123)) which exhibits a large JT distortion in conjunction with charge-ordering of cobalt (Co) shows the best oxygen reduction reaction (ORR) activity at low temperature while SNC0.98 (P4mm symmetry (#99)), which displays a local JT distortion, shows the poorest performance. 2014 Journal Article http://hdl.handle.net/20.500.11937/27773 10.1039/c4ra06191h Royal Society of Chemistry restricted |
| spellingShingle | Zhu, Y. Lin, Y. Shen, X. Sunarso, J. Zhou, W. Jiang, S. Su, D. Chen, F. Shao, Zongping Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-dperovskite cathodes |
| title | Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-dperovskite cathodes |
| title_full | Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-dperovskite cathodes |
| title_fullStr | Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-dperovskite cathodes |
| title_full_unstemmed | Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-dperovskite cathodes |
| title_short | Influence of crystal structure on the electrochemical performance of A-site-deficient Sr1-sNb0.1Co0.9O3-dperovskite cathodes |
| title_sort | influence of crystal structure on the electrochemical performance of a-site-deficient sr1-snb0.1co0.9o3-dperovskite cathodes |
| url | http://hdl.handle.net/20.500.11937/27773 |