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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Vydáno v:	Angewandte Chemie (International ed.) Ročník 57; číslo 28; s. 8525 - 8529
Hlavní autoři:	Jiao, Long, Wan, Gang, Zhang, Rui, Zhou, Hua, Yu, Shu‐Hong, Jiang, Hai‐Long
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Germany Wiley Subscription Services, Inc 09.07.2018 Wiley
Vydání:	International ed. in English
Témata:	Catalysis Catalysts Chemical synthesis Fabrication Heavy metals INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Iron Ligands Metal-organic frameworks Metals Oxygen oxygen reduction reaction porous carbon Pyrolysis Reduction Single atom catalysts single-atom catalysts porous carbon oxygen reduction reaction metal-organic frameworks
ISSN:	1433-7851, 1521-3773, 1521-3773
On-line přístup:	Získat plný text
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Popis
Shrnutí:	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. Iron islands: Based on a mixed‐ligand strategy, a porphyrinic MOF was pyrolyzed to afford high‐content single‐atom iron‐implanted N‐doped porous carbon (FeSA‐N‐C). Thanks to the FeSA sites, hierarchical pores, oriented mesochannels, and high conductivity, FeSA‐N‐C exhibits excellent oxygen reduction activity and stability, surpassing almost all non‐noble‐metal catalysts and Pt/C, in both alkaline and the more challenging acidic media.
Bibliografie:	These authors contributed equally to this work. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 AC02-06CH11357 USDOE Office of Science (SC), Basic Energy Sciences (BES)
ISSN:	1433-7851 1521-3773 1521-3773
DOI:	10.1002/anie.201803262