Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution
Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2016
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| Online Access: | https://hdl.handle.net/10356/82074 http://hdl.handle.net/10220/39754 |
| _version_ | 1811677394774261760 |
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| author | Ge, Xiaoming Liu, Yayuan Goh, F. W. Thomas Hor, T. S. Andy Zong, Yun Xiao, Peng Zhang, Zheng Lim, Suo Hon Li, Bing Wang, Xin Liu, Zhaolin |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Ge, Xiaoming Liu, Yayuan Goh, F. W. Thomas Hor, T. S. Andy Zong, Yun Xiao, Peng Zhang, Zheng Lim, Suo Hon Li, Bing Wang, Xin Liu, Zhaolin |
| author_sort | Ge, Xiaoming |
| collection | NTU |
| description | Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo2O4 (dp-MnCo2O4) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo2O4 and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo2O4/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc–air battery using dp-MnCo2O4/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge–charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions. |
| first_indexed | 2024-10-01T02:36:40Z |
| format | Journal Article |
| id | ntu-10356/82074 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:36:40Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/820742023-07-14T15:49:31Z Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution Ge, Xiaoming Liu, Yayuan Goh, F. W. Thomas Hor, T. S. Andy Zong, Yun Xiao, Peng Zhang, Zheng Lim, Suo Hon Li, Bing Wang, Xin Liu, Zhaolin School of Chemical and Biomedical Engineering School of Materials Science & Engineering Oxygen evolution reaction Covalent coupling Oxygen reduction reaction Transition-metal oxide Spinel Nanocarbon Metal-air battery Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo2O4 (dp-MnCo2O4) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo2O4 and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo2O4/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc–air battery using dp-MnCo2O4/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge–charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions. ASTAR (Agency for Sci., Tech. and Research, S’pore) Accepted version 2016-01-22T05:28:59Z 2019-12-06T14:46:00Z 2016-01-22T05:28:59Z 2019-12-06T14:46:00Z 2014 Journal Article Ge, X., Liu, Y., Goh, F. W. T., Hor, T. S. A., Zong, Y., Xiao, P., et al. (2014). Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution. ACS Applied Materials & Interfaces, 6(15), 12684-12691. 1944-8244 https://hdl.handle.net/10356/82074 http://hdl.handle.net/10220/39754 10.1021/am502675c en ACS Applied Materials & Interfaces © 2014 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by ACS Applied Materials & Interfaces, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1021/am502675c]. 34 p. application/pdf |
| spellingShingle | Oxygen evolution reaction Covalent coupling Oxygen reduction reaction Transition-metal oxide Spinel Nanocarbon Metal-air battery Ge, Xiaoming Liu, Yayuan Goh, F. W. Thomas Hor, T. S. Andy Zong, Yun Xiao, Peng Zhang, Zheng Lim, Suo Hon Li, Bing Wang, Xin Liu, Zhaolin Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution |
| title | Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution |
| title_full | Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution |
| title_fullStr | Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution |
| title_full_unstemmed | Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution |
| title_short | Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution |
| title_sort | dual phase spinel mnco2o4 and spinel mnco2o4 nanocarbon hybrids for electrocatalytic oxygen reduction and evolution |
| topic | Oxygen evolution reaction Covalent coupling Oxygen reduction reaction Transition-metal oxide Spinel Nanocarbon Metal-air battery |
| url | https://hdl.handle.net/10356/82074 http://hdl.handle.net/10220/39754 |
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