Reduced Graphene Oxide-Supported Iron-Cobalt Alloys as High-Performance Catalysts for Oxygen Reduction Reaction
Exploring non-precious metal-based catalysts for oxygen reduction reactions (ORR) as a substitute for precious metal catalysts has attracted great attention in recent times. In this paper, we report a general methodology for preparing nitrogen-doped reduced graphene oxide (N–rGO)-supported, FeCo all...
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MDPI AG
2023-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/19/2735 |
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| author | Jun Dong Shanshan Wang Peng Xi Xinggao Zhang Xinyu Zhu Huining Wang Taizhong Huang |
| author_facet | Jun Dong Shanshan Wang Peng Xi Xinggao Zhang Xinyu Zhu Huining Wang Taizhong Huang |
| author_sort | Jun Dong |
| collection | DOAJ |
| description | Exploring non-precious metal-based catalysts for oxygen reduction reactions (ORR) as a substitute for precious metal catalysts has attracted great attention in recent times. In this paper, we report a general methodology for preparing nitrogen-doped reduced graphene oxide (N–rGO)-supported, FeCo alloy (FeCo@N–rGO)-based catalysts for ORR. The structure of the FeCo@N–rGO based catalysts is investigated using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and transition electron microscopy, etc. Results show that the FeCo alloy is supported by the rGO and carbon that derives from the organic ligand of Fe and Co ions. The eletrocatalytic performance is examined by cyclic voltammetry, linear scanning voltammetry, Tafel, electrochemical spectroscopy impedance, rotate disc electrode, and rotate ring disc electrode, etc. Results show that FeCo@N–rGO based catalysts exhibit an onset potential of 0.98 V (vs. RHE) and a half-wave potential of 0.93 V (vs. RHE). The excellent catalytic performance of FeCo@N–rGO is ascribed to its large surface area and the synergistic effect between FeCo alloy and N–rGO, which provides a large number of active sites and a sufficient surface area. |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T21:38:25Z |
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| spelling | doaj.art-1dfb111ade4d4df3b8af2274b103d8cd2023-11-19T14:50:04ZengMDPI AGNanomaterials2079-49912023-10-011319273510.3390/nano13192735Reduced Graphene Oxide-Supported Iron-Cobalt Alloys as High-Performance Catalysts for Oxygen Reduction ReactionJun Dong0Shanshan Wang1Peng Xi2Xinggao Zhang3Xinyu Zhu4Huining Wang5Taizhong Huang6School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaShandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, ChinaXi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaState Key Laboratory of NBC Protection for Civilian, Beijing 102205, ChinaShandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, ChinaShandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, ChinaShandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, ChinaExploring non-precious metal-based catalysts for oxygen reduction reactions (ORR) as a substitute for precious metal catalysts has attracted great attention in recent times. In this paper, we report a general methodology for preparing nitrogen-doped reduced graphene oxide (N–rGO)-supported, FeCo alloy (FeCo@N–rGO)-based catalysts for ORR. The structure of the FeCo@N–rGO based catalysts is investigated using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and transition electron microscopy, etc. Results show that the FeCo alloy is supported by the rGO and carbon that derives from the organic ligand of Fe and Co ions. The eletrocatalytic performance is examined by cyclic voltammetry, linear scanning voltammetry, Tafel, electrochemical spectroscopy impedance, rotate disc electrode, and rotate ring disc electrode, etc. Results show that FeCo@N–rGO based catalysts exhibit an onset potential of 0.98 V (vs. RHE) and a half-wave potential of 0.93 V (vs. RHE). The excellent catalytic performance of FeCo@N–rGO is ascribed to its large surface area and the synergistic effect between FeCo alloy and N–rGO, which provides a large number of active sites and a sufficient surface area.https://www.mdpi.com/2079-4991/13/19/2735oxygen reduction reactionFeCo alloysnitrogen-doped reduced graphene oxidecatalysts |
| spellingShingle | Jun Dong Shanshan Wang Peng Xi Xinggao Zhang Xinyu Zhu Huining Wang Taizhong Huang Reduced Graphene Oxide-Supported Iron-Cobalt Alloys as High-Performance Catalysts for Oxygen Reduction Reaction Nanomaterials oxygen reduction reaction FeCo alloys nitrogen-doped reduced graphene oxide catalysts |
| title | Reduced Graphene Oxide-Supported Iron-Cobalt Alloys as High-Performance Catalysts for Oxygen Reduction Reaction |
| title_full | Reduced Graphene Oxide-Supported Iron-Cobalt Alloys as High-Performance Catalysts for Oxygen Reduction Reaction |
| title_fullStr | Reduced Graphene Oxide-Supported Iron-Cobalt Alloys as High-Performance Catalysts for Oxygen Reduction Reaction |
| title_full_unstemmed | Reduced Graphene Oxide-Supported Iron-Cobalt Alloys as High-Performance Catalysts for Oxygen Reduction Reaction |
| title_short | Reduced Graphene Oxide-Supported Iron-Cobalt Alloys as High-Performance Catalysts for Oxygen Reduction Reaction |
| title_sort | reduced graphene oxide supported iron cobalt alloys as high performance catalysts for oxygen reduction reaction |
| topic | oxygen reduction reaction FeCo alloys nitrogen-doped reduced graphene oxide catalysts |
| url | https://www.mdpi.com/2079-4991/13/19/2735 |
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