Size-dependent activity of Fe-N-doped mesoporous carbon nanoparticles towards oxygen reduction reaction
The rational design of Fe–N–C catalysts that possess easily accessible active sites and favorable mass transfer, which are usually determined by the structure of catalyst supports, is crucial for the oxygen reduction reaction (ORR). In this study, an oleic acid-assisted soft-templating approach is d...
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KeAi Communications Co., Ltd.
2024-06-01
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| Series: | Green Carbon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2950155524000260 |
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| author | Yilun Zhao Zhengbin Tian Wenquan Wang Xiaohui Deng Jo-Chi Tseng Guanghui Wang |
| author_facet | Yilun Zhao Zhengbin Tian Wenquan Wang Xiaohui Deng Jo-Chi Tseng Guanghui Wang |
| author_sort | Yilun Zhao |
| collection | DOAJ |
| description | The rational design of Fe–N–C catalysts that possess easily accessible active sites and favorable mass transfer, which are usually determined by the structure of catalyst supports, is crucial for the oxygen reduction reaction (ORR). In this study, an oleic acid-assisted soft-templating approach is developed to synthesize size-controlled nitrogen-doped carbon nanoparticles (ranging from 130 nm to 60 nm and 35 nm, respectively) that feature spiral mesopores on their surface (SMCs). Next, atomically dispersed Fe–Nx sites are fabricated on the size-tunable SMCs (Fe1/SMC-x, where x represents the SMC size) and the size-dependent activity toward ORR is investigated. It is found that the catalytic performance of Fe1/SMCs is significantly influenced by the size of SMCs, where the Fe1/SMC-60 catalyst shows the highest ORR activity with a half-wave potential of 0.90 V vs. RHE in KOH electrolyte, indicating that the gas-liquid-solid three-phase interface on the Fe1/SMC-60 enhances the accessibility of Fe–Nx sites. In addition, when using Fe1/SMC-60 as the cathode catalyst in aqueous zinc-air batteries (ZABs), it delivers a higher open-circuit voltage (1.514 V), a greater power density (223 mW cm−2), and a larger specific capacity/energy than Pt/C-based counterparts. These results further highlight the potential of Fe1/SMC-60 for practical energy devices associated with ORR and the importance of size-controlled synthesis of SMCs. |
| format | Article |
| id | doaj-art-50e2ceda8f2349c29a910c8d91e7e67c |
| institution | Kabale University |
| issn | 2950-1555 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Green Carbon |
| spelling | doaj-art-50e2ceda8f2349c29a910c8d91e7e67c2025-08-20T03:42:45ZengKeAi Communications Co., Ltd.Green Carbon2950-15552024-06-012222123010.1016/j.greenca.2024.03.002Size-dependent activity of Fe-N-doped mesoporous carbon nanoparticles towards oxygen reduction reactionYilun Zhao0Zhengbin Tian1Wenquan Wang2Xiaohui Deng3Jo-Chi Tseng4Guanghui Wang5Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; Shandong Energy Institute, Qingdao 266101, China; Qingdao New Energy Shandong Laboratory, Qingdao 266101, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaQingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; Shandong Energy Institute, Qingdao 266101, China; Qingdao New Energy Shandong Laboratory, Qingdao 266101, China; Corresponding authors.Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; Shandong Energy Institute, Qingdao 266101, China; Qingdao New Energy Shandong Laboratory, Qingdao 266101, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaQingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; Shandong Energy Institute, Qingdao 266101, China; Qingdao New Energy Shandong Laboratory, Qingdao 266101, ChinaJapan Synchrotron Radiation Research Institute, Hyogo 679-5198, JapanQingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; Shandong Energy Institute, Qingdao 266101, China; Qingdao New Energy Shandong Laboratory, Qingdao 266101, China; University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding authors.The rational design of Fe–N–C catalysts that possess easily accessible active sites and favorable mass transfer, which are usually determined by the structure of catalyst supports, is crucial for the oxygen reduction reaction (ORR). In this study, an oleic acid-assisted soft-templating approach is developed to synthesize size-controlled nitrogen-doped carbon nanoparticles (ranging from 130 nm to 60 nm and 35 nm, respectively) that feature spiral mesopores on their surface (SMCs). Next, atomically dispersed Fe–Nx sites are fabricated on the size-tunable SMCs (Fe1/SMC-x, where x represents the SMC size) and the size-dependent activity toward ORR is investigated. It is found that the catalytic performance of Fe1/SMCs is significantly influenced by the size of SMCs, where the Fe1/SMC-60 catalyst shows the highest ORR activity with a half-wave potential of 0.90 V vs. RHE in KOH electrolyte, indicating that the gas-liquid-solid three-phase interface on the Fe1/SMC-60 enhances the accessibility of Fe–Nx sites. In addition, when using Fe1/SMC-60 as the cathode catalyst in aqueous zinc-air batteries (ZABs), it delivers a higher open-circuit voltage (1.514 V), a greater power density (223 mW cm−2), and a larger specific capacity/energy than Pt/C-based counterparts. These results further highlight the potential of Fe1/SMC-60 for practical energy devices associated with ORR and the importance of size-controlled synthesis of SMCs.http://www.sciencedirect.com/science/article/pii/S2950155524000260Soft-templating approachSize-dependent activityFe–N–C catalystOxygen reduction reactionZinc-air battery |
| spellingShingle | Yilun Zhao Zhengbin Tian Wenquan Wang Xiaohui Deng Jo-Chi Tseng Guanghui Wang Size-dependent activity of Fe-N-doped mesoporous carbon nanoparticles towards oxygen reduction reaction Green Carbon Soft-templating approach Size-dependent activity Fe–N–C catalyst Oxygen reduction reaction Zinc-air battery |
| title | Size-dependent activity of Fe-N-doped mesoporous carbon nanoparticles towards oxygen reduction reaction |
| title_full | Size-dependent activity of Fe-N-doped mesoporous carbon nanoparticles towards oxygen reduction reaction |
| title_fullStr | Size-dependent activity of Fe-N-doped mesoporous carbon nanoparticles towards oxygen reduction reaction |
| title_full_unstemmed | Size-dependent activity of Fe-N-doped mesoporous carbon nanoparticles towards oxygen reduction reaction |
| title_short | Size-dependent activity of Fe-N-doped mesoporous carbon nanoparticles towards oxygen reduction reaction |
| title_sort | size dependent activity of fe n doped mesoporous carbon nanoparticles towards oxygen reduction reaction |
| topic | Soft-templating approach Size-dependent activity Fe–N–C catalyst Oxygen reduction reaction Zinc-air battery |
| url | http://www.sciencedirect.com/science/article/pii/S2950155524000260 |
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