Structure and activity of strontium substituted LaCoO3 perovskite catalysts for syngas conversion
© 2016 Elsevier B.V. All rights reserved. Study of the catalytic activity of LaCoO3 perovskite catalysts with varying degrees of strontium substitution (La1-xSrxCoO3) in the Fischer-Tropsch synthesis is presented for the first time in this paper. It was found that Sr substitution improves the cataly...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
Elsevier Science
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/36953 |
| _version_ | 1848754913469792256 |
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| author | Ao, M. Pham, Gia Sage, V. Pareek, Vishnu |
| author_facet | Ao, M. Pham, Gia Sage, V. Pareek, Vishnu |
| author_sort | Ao, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2016 Elsevier B.V. All rights reserved. Study of the catalytic activity of LaCoO3 perovskite catalysts with varying degrees of strontium substitution (La1-xSrxCoO3) in the Fischer-Tropsch synthesis is presented for the first time in this paper. It was found that Sr substitution improves the catalyst's reducibility and increasing strontium substitution beyond a threshold of 10 mol% Sr has an inverse effect on the catalytic performance in the syngas conversion. For x = 0.1, the catalysts exhibited a stable rhombohedral structure, which leads to well dispersion of active centre Co0 during the reduction process and displayed a high catalytic activity. For x = 0.2 the catalyst structure was gradually changed, from a rhombohedral to a less stable cubic structure, and leads to Co0 sintering. The turnover frequency of Co atom in the Fischer-Tropsch reaction decreased significantly with increasing strontium substitution levels due to the loss of active catalyst surface. The La0.9Sr0.1CoO3 catalyst showed the highest catalytic activity in the Fischer-Tropsch synthesis. |
| first_indexed | 2025-11-14T08:47:58Z |
| format | Journal Article |
| id | curtin-20.500.11937-36953 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:47:58Z |
| publishDate | 2016 |
| publisher | Elsevier Science |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-369532017-09-13T15:19:08Z Structure and activity of strontium substituted LaCoO3 perovskite catalysts for syngas conversion Ao, M. Pham, Gia Sage, V. Pareek, Vishnu © 2016 Elsevier B.V. All rights reserved. Study of the catalytic activity of LaCoO3 perovskite catalysts with varying degrees of strontium substitution (La1-xSrxCoO3) in the Fischer-Tropsch synthesis is presented for the first time in this paper. It was found that Sr substitution improves the catalyst's reducibility and increasing strontium substitution beyond a threshold of 10 mol% Sr has an inverse effect on the catalytic performance in the syngas conversion. For x = 0.1, the catalysts exhibited a stable rhombohedral structure, which leads to well dispersion of active centre Co0 during the reduction process and displayed a high catalytic activity. For x = 0.2 the catalyst structure was gradually changed, from a rhombohedral to a less stable cubic structure, and leads to Co0 sintering. The turnover frequency of Co atom in the Fischer-Tropsch reaction decreased significantly with increasing strontium substitution levels due to the loss of active catalyst surface. The La0.9Sr0.1CoO3 catalyst showed the highest catalytic activity in the Fischer-Tropsch synthesis. 2016 Journal Article http://hdl.handle.net/20.500.11937/36953 10.1016/j.molcata.2016.02.020 Elsevier Science restricted |
| spellingShingle | Ao, M. Pham, Gia Sage, V. Pareek, Vishnu Structure and activity of strontium substituted LaCoO3 perovskite catalysts for syngas conversion |
| title | Structure and activity of strontium substituted LaCoO3 perovskite catalysts for syngas conversion |
| title_full | Structure and activity of strontium substituted LaCoO3 perovskite catalysts for syngas conversion |
| title_fullStr | Structure and activity of strontium substituted LaCoO3 perovskite catalysts for syngas conversion |
| title_full_unstemmed | Structure and activity of strontium substituted LaCoO3 perovskite catalysts for syngas conversion |
| title_short | Structure and activity of strontium substituted LaCoO3 perovskite catalysts for syngas conversion |
| title_sort | structure and activity of strontium substituted lacoo3 perovskite catalysts for syngas conversion |
| url | http://hdl.handle.net/20.500.11937/36953 |