Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes
Herein, nitrogen-doped carbon coated hollow Co9S8 microtubes (Co9S8@N–C microtubes) are prepared through a facile solvothermal procedure, followed by dopamine polymerization process together with a post-pyrolysis which present excellent electrocatalytic activity for oxygen reduction reaction (ORR)....
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/141359 |
| _version_ | 1811696853768470528 |
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| author | Wu, Zexing Wang, Jie Song, Min Zhao, Guangming Zhu, Ye Fu, Gengtao Liu, Xien |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Wu, Zexing Wang, Jie Song, Min Zhao, Guangming Zhu, Ye Fu, Gengtao Liu, Xien |
| author_sort | Wu, Zexing |
| collection | NTU |
| description | Herein, nitrogen-doped carbon coated hollow Co9S8 microtubes (Co9S8@N–C microtubes) are prepared through a facile solvothermal procedure, followed by dopamine polymerization process together with a post-pyrolysis which present excellent electrocatalytic activity for oxygen reduction reaction (ORR). The Co9S8 within the hollow Co9S8@N–C microtubes presents a well-defined single-crystal structure with dominated (022) plane. To obtain desired electrocatalyst, the annealing temperature and the thickness of carbon layer tuned by changing the dopamine concentration are optimized systematically. The electrochemical results demonstrate that the coordination of the N-doped carbon layer, exposed (022) plane, and hollow architecture of Co9S8 microtubes calcined at 700 °C affords outstanding ORR performance to Co9S8@N–C microtubes. The moderate thickness of the carbon layer is crucial for improving ORR activity of Co9S8@N–C microtubes, while increasing or decreasing the thickness would result in activity decrease. More importantly, the N-doped carbon layer can protect inner Co9S8 from undergoing aggregation and dissolution effectively during the ORR, resulting in excellent electrocatalytic stability. |
| first_indexed | 2024-10-01T07:45:58Z |
| format | Journal Article |
| id | ntu-10356/141359 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:45:58Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1413592020-06-08T02:25:19Z Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes Wu, Zexing Wang, Jie Song, Min Zhao, Guangming Zhu, Ye Fu, Gengtao Liu, Xien School of Chemical and Biomedical Engineering Engineering::Chemical engineering Co9S8 Microtubes Herein, nitrogen-doped carbon coated hollow Co9S8 microtubes (Co9S8@N–C microtubes) are prepared through a facile solvothermal procedure, followed by dopamine polymerization process together with a post-pyrolysis which present excellent electrocatalytic activity for oxygen reduction reaction (ORR). The Co9S8 within the hollow Co9S8@N–C microtubes presents a well-defined single-crystal structure with dominated (022) plane. To obtain desired electrocatalyst, the annealing temperature and the thickness of carbon layer tuned by changing the dopamine concentration are optimized systematically. The electrochemical results demonstrate that the coordination of the N-doped carbon layer, exposed (022) plane, and hollow architecture of Co9S8 microtubes calcined at 700 °C affords outstanding ORR performance to Co9S8@N–C microtubes. The moderate thickness of the carbon layer is crucial for improving ORR activity of Co9S8@N–C microtubes, while increasing or decreasing the thickness would result in activity decrease. More importantly, the N-doped carbon layer can protect inner Co9S8 from undergoing aggregation and dissolution effectively during the ORR, resulting in excellent electrocatalytic stability. 2020-06-08T02:25:18Z 2020-06-08T02:25:18Z 2018 Journal Article Wu, Z., Wang, J., Song, M., Zhao, G., Zhu, Y., Fu, G., & Liu, X. (2018). Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes. ACS Applied Materials & Interfaces, 10(30), 25415-25421. doi:10.1021/acsami.8b07207 1944-8244 https://hdl.handle.net/10356/141359 10.1021/acsami.8b07207 29979562 2-s2.0-85049665292 30 10 25415 25421 en ACS Applied Materials & Interfaces © 2018 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering Co9S8 Microtubes Wu, Zexing Wang, Jie Song, Min Zhao, Guangming Zhu, Ye Fu, Gengtao Liu, Xien Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes |
| title | Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes |
| title_full | Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes |
| title_fullStr | Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes |
| title_full_unstemmed | Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes |
| title_short | Boosting oxygen reduction catalysis with n-doped carbon coated Co9S8 microtubes |
| title_sort | boosting oxygen reduction catalysis with n doped carbon coated co9s8 microtubes |
| topic | Engineering::Chemical engineering Co9S8 Microtubes |
| url | https://hdl.handle.net/10356/141359 |
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