In situ construction of MOF derived CoNC anchored on N-doped carbon xerogel sphere as efficient bifunctional ORR/OER electrocatalyst for Zn-air batteries
Abstract Electrocatalytic materials with dual functions of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) have received increasing attention in the field of zinc-air batteries (ZABs) research. In this study, bifunctional CoNC@NCXS catalysts were prepared by anchoring Co and N co...
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Nature Portfolio
2025-01-01
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| author | Hong Jin Dejian Lin Laihong Zhou Guojun Zha Huanwen Wu Shuigen Li Minhua Jiang Ping Huang Haijiao Xie |
| author_facet | Hong Jin Dejian Lin Laihong Zhou Guojun Zha Huanwen Wu Shuigen Li Minhua Jiang Ping Huang Haijiao Xie |
| author_sort | Hong Jin |
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| description | Abstract Electrocatalytic materials with dual functions of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) have received increasing attention in the field of zinc-air batteries (ZABs) research. In this study, bifunctional CoNC@NCXS catalysts were prepared by anchoring Co and N co-doped CoNC on N-doped carbon xerogel sphere (NCXS) based on the spatially confined domain effect and in-situ doping technique. CoNC@NCXS exhibited excellent ORR/OER activity in alkaline electrolytes with the ORR onset potential of 0.99 V, the half-wave potential (E1/2) of 0.78 V at 10 mA cm−2 and the OER overpotential of 360 mV at 10 mA cm−2. These excellent catalytic activities were derived from constructing composite active structures and enhancing electrocatalytic efficiency. The ZAB assembled with CoNC@NCXS catalyst had a discharge specific capacity of 710 mAh g−1 at a current density of 10 mA cm−2, which was superior to that of the Pt/C&RuO2 catalyst-assembled battery (667 mAh g−1). After running for 150 h, the charge and discharge efficiency of the CoNC@NCXS battery decreased by only 12.8%, which confirmed the excellent stability of the CoNC@NCXS catalyst. The free energy diagrams showed that, CoNC@NCXS has lower energy barriers and higher potential than CoNC in key reaction steps. This study provides a new perspective for the structural design of highly active composite catalysts in energy storage and conversion. |
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| institution | Kabale University |
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| language | English |
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| spelling | doaj-art-481b9d1574c3452cba5d68595c306bec2025-02-02T12:15:54ZengNature PortfolioScientific Reports2045-23222025-01-0115111110.1038/s41598-025-87952-2In situ construction of MOF derived CoNC anchored on N-doped carbon xerogel sphere as efficient bifunctional ORR/OER electrocatalyst for Zn-air batteriesHong Jin0Dejian Lin1Laihong Zhou2Guojun Zha3Huanwen Wu4Shuigen Li5Minhua Jiang6Ping Huang7Haijiao Xie8Jiangxi Key Laboratory of Power Batteries and Energy Storage Materials, Xinyu UniversityJiangxi Key Laboratory of Power Batteries and Energy Storage Materials, Xinyu UniversityJiangxi Key Laboratory of Power Batteries and Energy Storage Materials, Xinyu UniversityJiangxi Key Laboratory of Power Batteries and Energy Storage Materials, Xinyu UniversityJiangxi Key Laboratory of Power Batteries and Energy Storage Materials, Xinyu UniversityJiangxi Key Laboratory of Power Batteries and Energy Storage Materials, Xinyu UniversityJiangxi Key Laboratory of Power Batteries and Energy Storage Materials, Xinyu UniversityJiangxi Key Laboratory of Power Batteries and Energy Storage Materials, Xinyu UniversityHangzhou Yanqu Information Technology Co., Ltd.Abstract Electrocatalytic materials with dual functions of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) have received increasing attention in the field of zinc-air batteries (ZABs) research. In this study, bifunctional CoNC@NCXS catalysts were prepared by anchoring Co and N co-doped CoNC on N-doped carbon xerogel sphere (NCXS) based on the spatially confined domain effect and in-situ doping technique. CoNC@NCXS exhibited excellent ORR/OER activity in alkaline electrolytes with the ORR onset potential of 0.99 V, the half-wave potential (E1/2) of 0.78 V at 10 mA cm−2 and the OER overpotential of 360 mV at 10 mA cm−2. These excellent catalytic activities were derived from constructing composite active structures and enhancing electrocatalytic efficiency. The ZAB assembled with CoNC@NCXS catalyst had a discharge specific capacity of 710 mAh g−1 at a current density of 10 mA cm−2, which was superior to that of the Pt/C&RuO2 catalyst-assembled battery (667 mAh g−1). After running for 150 h, the charge and discharge efficiency of the CoNC@NCXS battery decreased by only 12.8%, which confirmed the excellent stability of the CoNC@NCXS catalyst. The free energy diagrams showed that, CoNC@NCXS has lower energy barriers and higher potential than CoNC in key reaction steps. This study provides a new perspective for the structural design of highly active composite catalysts in energy storage and conversion.https://doi.org/10.1038/s41598-025-87952-2Zinc-air batteryElectrocatalysisBifunctional catalystN-doped carbon xerogel |
| spellingShingle | Hong Jin Dejian Lin Laihong Zhou Guojun Zha Huanwen Wu Shuigen Li Minhua Jiang Ping Huang Haijiao Xie In situ construction of MOF derived CoNC anchored on N-doped carbon xerogel sphere as efficient bifunctional ORR/OER electrocatalyst for Zn-air batteries Scientific Reports Zinc-air battery Electrocatalysis Bifunctional catalyst N-doped carbon xerogel |
| title | In situ construction of MOF derived CoNC anchored on N-doped carbon xerogel sphere as efficient bifunctional ORR/OER electrocatalyst for Zn-air batteries |
| title_full | In situ construction of MOF derived CoNC anchored on N-doped carbon xerogel sphere as efficient bifunctional ORR/OER electrocatalyst for Zn-air batteries |
| title_fullStr | In situ construction of MOF derived CoNC anchored on N-doped carbon xerogel sphere as efficient bifunctional ORR/OER electrocatalyst for Zn-air batteries |
| title_full_unstemmed | In situ construction of MOF derived CoNC anchored on N-doped carbon xerogel sphere as efficient bifunctional ORR/OER electrocatalyst for Zn-air batteries |
| title_short | In situ construction of MOF derived CoNC anchored on N-doped carbon xerogel sphere as efficient bifunctional ORR/OER electrocatalyst for Zn-air batteries |
| title_sort | in situ construction of mof derived conc anchored on n doped carbon xerogel sphere as efficient bifunctional orr oer electrocatalyst for zn air batteries |
| topic | Zinc-air battery Electrocatalysis Bifunctional catalyst N-doped carbon xerogel |
| url | https://doi.org/10.1038/s41598-025-87952-2 |
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