From Metal–Organic Frameworks to Single‐Atom Fe Implanted N‐doped Porous Carbons: Efficient Oxygen Reduction in Both Alkaline and Acidic Media

It remains highly desired but a great challenge to achieve atomically dispersed metals in high loadings for efficient catalysis. Now porphyrinic metal–organic frameworks (MOFs) have been synthesized based on a novel mixed‐ligand strategy to afford high‐content (1.76 wt %) single‐atom (SA) iron‐impla...

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Bibliographic Details
Published in:Angewandte Chemie 2018-07, Vol.130 (28), p.8661-8665
Main Authors: Jiao, Long, Wan, Gang, Zhang, Rui, Zhou, Hua, Yu, Shu‐Hong, Jiang, Hai‐Long
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Chemical synthesis
Chemistry
Einzelatomkatalysatoren
Fabrication
Heavy metals
Iron
Ligands
Metal-organic frameworks
Metall-organische Gerüste
Metals
Oxygen
Poröser Kohlenstoff
Pyrolysis
Reduction
Sauerstoffreduktion
Single atom catalysts
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Summary:It remains highly desired but a great challenge to achieve atomically dispersed metals in high loadings for efficient catalysis. Now porphyrinic metal–organic frameworks (MOFs) have been synthesized based on a novel mixed‐ligand strategy to afford high‐content (1.76 wt %) single‐atom (SA) iron‐implanted N‐doped porous carbon (FeSA‐N‐C) via pyrolysis. Thanks to the single‐atom Fe sites, hierarchical pores, oriented mesochannels and high conductivity, the optimized FeSA‐N‐C exhibits excellent oxygen reduction activity and stability, surpassing almost all non‐noble‐metal catalysts and state‐of‐the‐art Pt/C, in both alkaline and more challenging acidic media. More far‐reaching, this MOF‐based mixed‐ligand strategy opens a novel avenue to the precise fabrication of efficient single‐atom catalysts. Eiseninseln: Die Pyrolyse eines Porphyrin‐MOF mit gemischten Liganden hinterlässt N‐dotierten porösen Kohlenstoff mit einer großen Menge an isolierten Eisenzentren (FeSA‐N‐C). FeSA‐Zentren, hierarchische Poren, ausgerichtete Mesokanäle und eine hohe Leitfähigkeit verleihen FeSA‐N‐C eine ausgezeichnete Aktivität und Stabilität in der Sauerstoffreduktion, mit der das Material sowohl in alkalischen als auch in den schwierigeren sauren Medien fast alle Nichtedelmetall‐Katalysatoren und Pt/C übertrifft.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201803262