Preparation of Spiral Nitrogen-Doped Macroscopic Graphene Tube and Tuning the Activity of Oxygen Catalysis by Twisted Ferrum (Fe) Wires
A FeNx-C-based catalyst is considered one of the most promising candidates for the highest oxygen reduction reaction (ORR) activities among nonprecious metal-based electrocatalysts. In this work, a unique catalyst of nitrogen-doped twisted macroscopic graphene tubes decorated with Fe-Nx and bamboo-l...
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MDPI AG
2022-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/12/2050 |
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| author | Yongfeng Li Yanzhen Liu Shuai Chen Xiaoming Li Shengguo Ma |
| author_facet | Yongfeng Li Yanzhen Liu Shuai Chen Xiaoming Li Shengguo Ma |
| author_sort | Yongfeng Li |
| collection | DOAJ |
| description | A FeNx-C-based catalyst is considered one of the most promising candidates for the highest oxygen reduction reaction (ORR) activities among nonprecious metal-based electrocatalysts. In this work, a unique catalyst of nitrogen-doped twisted macroscopic graphene tubes decorated with Fe-Nx and bamboo-like carbon nanotubes (CNT) was prepared by using twisted iron wire as a template and cyanamide as a carbon source. The microstructure and physicochemical natures of the samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopic (XPS), X-ray diffraction (XRD), and nitrogen adsorption/desorption measurements. Torsion can promote the dislocation of the iron wire lattice, and activate the surface Fe atoms, thus leading to the growth of bamboo-like carbon nanotubes and forming iron nitride. The product has a graphene-like macroscopic tube structure and exhibits excellent ORR activity. Such excellent ORR performance may be ascribed to the synergistic effect, including high ORR catalytic sites caused by the dislocation of the iron wire lattice, nitrogen heteroatoms doping, favorable reactant transport channels provided by macroscopic tube structure, and fast electron transfer rate induced by 3D continuous networks. |
| first_indexed | 2024-03-09T16:05:57Z |
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| id | doaj.art-39c4f824818b4b26a431b825e2f8f17d |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T16:05:57Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-39c4f824818b4b26a431b825e2f8f17d2023-11-24T16:40:00ZengMDPI AGMetals2075-47012022-11-011212205010.3390/met12122050Preparation of Spiral Nitrogen-Doped Macroscopic Graphene Tube and Tuning the Activity of Oxygen Catalysis by Twisted Ferrum (Fe) WiresYongfeng Li0Yanzhen Liu1Shuai Chen2Xiaoming Li3Shengguo Ma4College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaInstitute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, ChinaInstitute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, ChinaInstitute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, ChinaCollege of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaA FeNx-C-based catalyst is considered one of the most promising candidates for the highest oxygen reduction reaction (ORR) activities among nonprecious metal-based electrocatalysts. In this work, a unique catalyst of nitrogen-doped twisted macroscopic graphene tubes decorated with Fe-Nx and bamboo-like carbon nanotubes (CNT) was prepared by using twisted iron wire as a template and cyanamide as a carbon source. The microstructure and physicochemical natures of the samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopic (XPS), X-ray diffraction (XRD), and nitrogen adsorption/desorption measurements. Torsion can promote the dislocation of the iron wire lattice, and activate the surface Fe atoms, thus leading to the growth of bamboo-like carbon nanotubes and forming iron nitride. The product has a graphene-like macroscopic tube structure and exhibits excellent ORR activity. Such excellent ORR performance may be ascribed to the synergistic effect, including high ORR catalytic sites caused by the dislocation of the iron wire lattice, nitrogen heteroatoms doping, favorable reactant transport channels provided by macroscopic tube structure, and fast electron transfer rate induced by 3D continuous networks.https://www.mdpi.com/2075-4701/12/12/2050twisted iron wirescatalystgraphene tubeelectrocatalytic activity |
| spellingShingle | Yongfeng Li Yanzhen Liu Shuai Chen Xiaoming Li Shengguo Ma Preparation of Spiral Nitrogen-Doped Macroscopic Graphene Tube and Tuning the Activity of Oxygen Catalysis by Twisted Ferrum (Fe) Wires Metals twisted iron wires catalyst graphene tube electrocatalytic activity |
| title | Preparation of Spiral Nitrogen-Doped Macroscopic Graphene Tube and Tuning the Activity of Oxygen Catalysis by Twisted Ferrum (Fe) Wires |
| title_full | Preparation of Spiral Nitrogen-Doped Macroscopic Graphene Tube and Tuning the Activity of Oxygen Catalysis by Twisted Ferrum (Fe) Wires |
| title_fullStr | Preparation of Spiral Nitrogen-Doped Macroscopic Graphene Tube and Tuning the Activity of Oxygen Catalysis by Twisted Ferrum (Fe) Wires |
| title_full_unstemmed | Preparation of Spiral Nitrogen-Doped Macroscopic Graphene Tube and Tuning the Activity of Oxygen Catalysis by Twisted Ferrum (Fe) Wires |
| title_short | Preparation of Spiral Nitrogen-Doped Macroscopic Graphene Tube and Tuning the Activity of Oxygen Catalysis by Twisted Ferrum (Fe) Wires |
| title_sort | preparation of spiral nitrogen doped macroscopic graphene tube and tuning the activity of oxygen catalysis by twisted ferrum fe wires |
| topic | twisted iron wires catalyst graphene tube electrocatalytic activity |
| url | https://www.mdpi.com/2075-4701/12/12/2050 |
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