Mechanochemical Synthesis of Fluorine-Containing Co-Doped Zeolitic Imidazolate Frameworks for Producing Electrocatalysts
Catalysts derived from pyrolysis of metal organic frameworks (MOFs) are promising candidates to replace expensive and scarce platinum-based electrocatalysts commonly used in polymer electrolyte membrane fuel cells. MOFs contain ordered connections between metal centers and organic ligands. They can...
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Frontiers Media S.A.
2022-03-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2022.840758/full |
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| author | Max Rautenberg Max Rautenberg Marius Gernhard Jörg Radnik Julia Witt Christina Roth Franziska Emmerling Franziska Emmerling |
| author_facet | Max Rautenberg Max Rautenberg Marius Gernhard Jörg Radnik Julia Witt Christina Roth Franziska Emmerling Franziska Emmerling |
| author_sort | Max Rautenberg |
| collection | DOAJ |
| description | Catalysts derived from pyrolysis of metal organic frameworks (MOFs) are promising candidates to replace expensive and scarce platinum-based electrocatalysts commonly used in polymer electrolyte membrane fuel cells. MOFs contain ordered connections between metal centers and organic ligands. They can be pyrolyzed into metal- and nitrogen-doped carbons, which show electrocatalytic activity toward the oxygen reduction reaction (ORR). Furthermore, metal-free heteroatom-doped carbons, such as N-F-Cs, are known for being active as well. Thus, a carbon material with Co-N-F doping could possibly be even more promising as ORR electrocatalyst. Herein, we report the mechanochemical synthesis of two polymorphs of a zeolitic imidazole framework, Co-doped zinc 2-trifluoromethyl-1H-imidazolate (Zn0.9Co0.1(CF3-Im)2). Time-resolved in situ X-ray diffraction studies of the mechanochemical formation revealed a direct conversion of starting materials to the products. Both polymorphs of Zn0.9Co0.1(CF3-Im)2 were pyrolyzed, yielding Co-N-F containing carbons, which are active toward electrochemical ORR. |
| first_indexed | 2024-12-22T06:21:49Z |
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| id | doaj.art-46720ac5af414b9b8d3f28c351973331 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-22T06:21:49Z |
| publishDate | 2022-03-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Chemistry |
| spelling | doaj.art-46720ac5af414b9b8d3f28c3519733312022-12-21T18:35:56ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462022-03-011010.3389/fchem.2022.840758840758Mechanochemical Synthesis of Fluorine-Containing Co-Doped Zeolitic Imidazolate Frameworks for Producing ElectrocatalystsMax Rautenberg0Max Rautenberg1Marius Gernhard2Jörg Radnik3Julia Witt4Christina Roth5Franziska Emmerling6Franziska Emmerling7BAM Federal Institute of Materials Research and Testing, Berlin, GermanyDepartment of Chemistry, Humboldt-Universität zu Berlin, Berlin, GermanyFakultät für Ingenieurwissenschaften, Lehrstuhl für Werkstoffverfahrenstechnik, Universität Bayreuth, Bayreuth, GermanyBAM Federal Institute of Materials Research and Testing, Berlin, GermanyBAM Federal Institute of Materials Research and Testing, Berlin, GermanyFakultät für Ingenieurwissenschaften, Lehrstuhl für Werkstoffverfahrenstechnik, Universität Bayreuth, Bayreuth, GermanyBAM Federal Institute of Materials Research and Testing, Berlin, GermanyDepartment of Chemistry, Humboldt-Universität zu Berlin, Berlin, GermanyCatalysts derived from pyrolysis of metal organic frameworks (MOFs) are promising candidates to replace expensive and scarce platinum-based electrocatalysts commonly used in polymer electrolyte membrane fuel cells. MOFs contain ordered connections between metal centers and organic ligands. They can be pyrolyzed into metal- and nitrogen-doped carbons, which show electrocatalytic activity toward the oxygen reduction reaction (ORR). Furthermore, metal-free heteroatom-doped carbons, such as N-F-Cs, are known for being active as well. Thus, a carbon material with Co-N-F doping could possibly be even more promising as ORR electrocatalyst. Herein, we report the mechanochemical synthesis of two polymorphs of a zeolitic imidazole framework, Co-doped zinc 2-trifluoromethyl-1H-imidazolate (Zn0.9Co0.1(CF3-Im)2). Time-resolved in situ X-ray diffraction studies of the mechanochemical formation revealed a direct conversion of starting materials to the products. Both polymorphs of Zn0.9Co0.1(CF3-Im)2 were pyrolyzed, yielding Co-N-F containing carbons, which are active toward electrochemical ORR.https://www.frontiersin.org/articles/10.3389/fchem.2022.840758/fullMOF (Metal–Organic framework)mechanochemistryXRDelectrocatalysismixed metal |
| spellingShingle | Max Rautenberg Max Rautenberg Marius Gernhard Jörg Radnik Julia Witt Christina Roth Franziska Emmerling Franziska Emmerling Mechanochemical Synthesis of Fluorine-Containing Co-Doped Zeolitic Imidazolate Frameworks for Producing Electrocatalysts Frontiers in Chemistry MOF (Metal–Organic framework) mechanochemistry XRD electrocatalysis mixed metal |
| title | Mechanochemical Synthesis of Fluorine-Containing Co-Doped Zeolitic Imidazolate Frameworks for Producing Electrocatalysts |
| title_full | Mechanochemical Synthesis of Fluorine-Containing Co-Doped Zeolitic Imidazolate Frameworks for Producing Electrocatalysts |
| title_fullStr | Mechanochemical Synthesis of Fluorine-Containing Co-Doped Zeolitic Imidazolate Frameworks for Producing Electrocatalysts |
| title_full_unstemmed | Mechanochemical Synthesis of Fluorine-Containing Co-Doped Zeolitic Imidazolate Frameworks for Producing Electrocatalysts |
| title_short | Mechanochemical Synthesis of Fluorine-Containing Co-Doped Zeolitic Imidazolate Frameworks for Producing Electrocatalysts |
| title_sort | mechanochemical synthesis of fluorine containing co doped zeolitic imidazolate frameworks for producing electrocatalysts |
| topic | MOF (Metal–Organic framework) mechanochemistry XRD electrocatalysis mixed metal |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2022.840758/full |
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