SrCo0.9Ti0.1O3−δ As a New Electrocatalyst for the Oxygen Evolution Reaction in Alkaline Electrolyte with Stable Performance
The development of efficient, inexpensive, and stable electrocatalysts for the oxygen evolution reaction (OER) is critical for many electrochemical energy conversion technologies. The prohibitive price and insufficient stability of the state-of-the-art IrO2 electrocatalyst for the OER inhibits its u...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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American Chemical Society
2015
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| Online Access: | http://purl.org/au-research/grants/arc/DP150104365 http://hdl.handle.net/20.500.11937/30318 |
| _version_ | 1848753055071207424 |
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| author | Su, C. Wang, W. Chen, Y. Yang, G. Xu, X. Tadé, M. Shao, Zongping |
| author_facet | Su, C. Wang, W. Chen, Y. Yang, G. Xu, X. Tadé, M. Shao, Zongping |
| author_sort | Su, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The development of efficient, inexpensive, and stable electrocatalysts for the oxygen evolution reaction (OER) is critical for many electrochemical energy conversion technologies. The prohibitive price and insufficient stability of the state-of-the-art IrO2 electrocatalyst for the OER inhibits its use in practical devices. Here, SrM0.9Ti0.1O3−δ (M = Co, Fe) perovskites with different B-site transition metal elements were investigated as potentially cheaper OER electrocatalysts. They were prepared through a typical sol–gel route, and their catalytic activities for the OER in alkaline medium were comparatively studied using rotating disk electrodes. Both materials show high initial intrinsic activities in alkaline electrolyte for the OER, comparable to the benchmark perovskite-type electrocatalyst Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF), but SrCo0.9Ti0.1O3−δ (SCT) possessed more operational stability than SrFe0.9Ti0.1O3−δ (SFT), even better than BSCF and IrO2 catalysts. Based on the X-ray photoelectron spectra analysis of the oxidation states of the surface Co/Fe in both SFT and SCT before and after the OER tests, an explanation for their different operational stabilities was proposed by adopting a reported activity descriptor correlated to the eg occupancy of the 3d electron of the surface transition metal cations in the perovskite oxides. The above results indicate that SCT is a promising alternative electrocatalyst for the OER and can be used in electrochemical devices for water oxidation. |
| first_indexed | 2025-11-14T08:18:25Z |
| format | Journal Article |
| id | curtin-20.500.11937-30318 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:18:25Z |
| publishDate | 2015 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-303182022-10-26T07:55:03Z SrCo0.9Ti0.1O3−δ As a New Electrocatalyst for the Oxygen Evolution Reaction in Alkaline Electrolyte with Stable Performance Su, C. Wang, W. Chen, Y. Yang, G. Xu, X. Tadé, M. Shao, Zongping The development of efficient, inexpensive, and stable electrocatalysts for the oxygen evolution reaction (OER) is critical for many electrochemical energy conversion technologies. The prohibitive price and insufficient stability of the state-of-the-art IrO2 electrocatalyst for the OER inhibits its use in practical devices. Here, SrM0.9Ti0.1O3−δ (M = Co, Fe) perovskites with different B-site transition metal elements were investigated as potentially cheaper OER electrocatalysts. They were prepared through a typical sol–gel route, and their catalytic activities for the OER in alkaline medium were comparatively studied using rotating disk electrodes. Both materials show high initial intrinsic activities in alkaline electrolyte for the OER, comparable to the benchmark perovskite-type electrocatalyst Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF), but SrCo0.9Ti0.1O3−δ (SCT) possessed more operational stability than SrFe0.9Ti0.1O3−δ (SFT), even better than BSCF and IrO2 catalysts. Based on the X-ray photoelectron spectra analysis of the oxidation states of the surface Co/Fe in both SFT and SCT before and after the OER tests, an explanation for their different operational stabilities was proposed by adopting a reported activity descriptor correlated to the eg occupancy of the 3d electron of the surface transition metal cations in the perovskite oxides. The above results indicate that SCT is a promising alternative electrocatalyst for the OER and can be used in electrochemical devices for water oxidation. 2015 Journal Article http://hdl.handle.net/20.500.11937/30318 10.1021/acsami.5b02810 http://purl.org/au-research/grants/arc/DP150104365 American Chemical Society restricted |
| spellingShingle | Su, C. Wang, W. Chen, Y. Yang, G. Xu, X. Tadé, M. Shao, Zongping SrCo0.9Ti0.1O3−δ As a New Electrocatalyst for the Oxygen Evolution Reaction in Alkaline Electrolyte with Stable Performance |
| title | SrCo0.9Ti0.1O3−δ As a New Electrocatalyst for the Oxygen Evolution Reaction in Alkaline Electrolyte with Stable Performance |
| title_full | SrCo0.9Ti0.1O3−δ As a New Electrocatalyst for the Oxygen Evolution Reaction in Alkaline Electrolyte with Stable Performance |
| title_fullStr | SrCo0.9Ti0.1O3−δ As a New Electrocatalyst for the Oxygen Evolution Reaction in Alkaline Electrolyte with Stable Performance |
| title_full_unstemmed | SrCo0.9Ti0.1O3−δ As a New Electrocatalyst for the Oxygen Evolution Reaction in Alkaline Electrolyte with Stable Performance |
| title_short | SrCo0.9Ti0.1O3−δ As a New Electrocatalyst for the Oxygen Evolution Reaction in Alkaline Electrolyte with Stable Performance |
| title_sort | srco0.9ti0.1o3−δ as a new electrocatalyst for the oxygen evolution reaction in alkaline electrolyte with stable performance |
| url | http://purl.org/au-research/grants/arc/DP150104365 http://hdl.handle.net/20.500.11937/30318 |