Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control
Searching for high-efficient, good long-term stability, and low-cost electrocatalysts toward oxygen reduction reaction (ORR) is highly desirable for the development of sustainable energy conversion devices. Iron–nitrogen doped carbon (Fe–N/C) catalysts have been recognized as the most promising cand...
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MDPI AG
2021-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/8/2106 |
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| author | Xin Yu Wang Ze Wei Lin Yan Qing Jiao Jian Cong Liu Rui Hong Wang |
| author_facet | Xin Yu Wang Ze Wei Lin Yan Qing Jiao Jian Cong Liu Rui Hong Wang |
| author_sort | Xin Yu Wang |
| collection | DOAJ |
| description | Searching for high-efficient, good long-term stability, and low-cost electrocatalysts toward oxygen reduction reaction (ORR) is highly desirable for the development of sustainable energy conversion devices. Iron–nitrogen doped carbon (Fe–N/C) catalysts have been recognized as the most promising candidates for traditional Pt-based catalysts that benefit from their high activity, excellent anti-poisoning ability, and inexpensiveness. Here, a super-dispersed and high-performance Fe–N/C catalyst was derived from chemically Fe-doped zeolitic imidazolate frameworks (ZIFs) by directly bonding Fe ions to imidazolate ligands within 3D frameworks. It produced a series of catalysts, whose sizes could be tuned in the range from 62 to over 473 nm in diameter. After rationally regulating the component and heating treatment, the best ORR activity was measured for the catalyst with a size of 105 nm, which was obtained when the Fe<sup>3+</sup>/Zn<sup>2+</sup> molar ratio was 0.05 and carbonization temperature was 900 °C. It exhibited a high onset potential (E<sub>onset</sub> = 0.99 V) and half-wave potential (E<sub>1/2</sub> = 0.885 V) compared with a commercial 20% Pt/C catalyst (E<sub>onset</sub> = 0.10 V, E<sub>1/2</sub> = 0.861 V) as well as much better durability and methanol resistance in an alkaline electrolyte. |
| first_indexed | 2024-03-10T08:31:46Z |
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| id | doaj.art-f5f2c625196c4e92acd1d44e463d2973 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T08:31:46Z |
| publishDate | 2021-08-01 |
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| series | Nanomaterials |
| spelling | doaj.art-f5f2c625196c4e92acd1d44e463d29732023-11-22T09:00:35ZengMDPI AGNanomaterials2079-49912021-08-01118210610.3390/nano11082106Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity ControlXin Yu Wang0Ze Wei Lin1Yan Qing Jiao2Jian Cong Liu3Rui Hong Wang4Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, ChinaSchool of Chemical Engineering and Chemistry, Harbin Institute of Technology, Harbin 150001, ChinaKey Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, ChinaKey Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, ChinaKey Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, ChinaSearching for high-efficient, good long-term stability, and low-cost electrocatalysts toward oxygen reduction reaction (ORR) is highly desirable for the development of sustainable energy conversion devices. Iron–nitrogen doped carbon (Fe–N/C) catalysts have been recognized as the most promising candidates for traditional Pt-based catalysts that benefit from their high activity, excellent anti-poisoning ability, and inexpensiveness. Here, a super-dispersed and high-performance Fe–N/C catalyst was derived from chemically Fe-doped zeolitic imidazolate frameworks (ZIFs) by directly bonding Fe ions to imidazolate ligands within 3D frameworks. It produced a series of catalysts, whose sizes could be tuned in the range from 62 to over 473 nm in diameter. After rationally regulating the component and heating treatment, the best ORR activity was measured for the catalyst with a size of 105 nm, which was obtained when the Fe<sup>3+</sup>/Zn<sup>2+</sup> molar ratio was 0.05 and carbonization temperature was 900 °C. It exhibited a high onset potential (E<sub>onset</sub> = 0.99 V) and half-wave potential (E<sub>1/2</sub> = 0.885 V) compared with a commercial 20% Pt/C catalyst (E<sub>onset</sub> = 0.10 V, E<sub>1/2</sub> = 0.861 V) as well as much better durability and methanol resistance in an alkaline electrolyte.https://www.mdpi.com/2079-4991/11/8/2106Fe-N sitesZIF-8super-dispersionORRhigh catalytic performance |
| spellingShingle | Xin Yu Wang Ze Wei Lin Yan Qing Jiao Jian Cong Liu Rui Hong Wang Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control Nanomaterials Fe-N sites ZIF-8 super-dispersion ORR high catalytic performance |
| title | Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control |
| title_full | Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control |
| title_fullStr | Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control |
| title_full_unstemmed | Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control |
| title_short | Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control |
| title_sort | super dispersed fe n sites embedded into porous graphitic carbon for orr size composition and activity control |
| topic | Fe-N sites ZIF-8 super-dispersion ORR high catalytic performance |
| url | https://www.mdpi.com/2079-4991/11/8/2106 |
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