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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Published in:Angewandte Chemie (International ed.) Vol. 57; no. 28; pp. 8525 - 8529
Main Authors: Jiao, Long, Wan, Gang, Zhang, Rui, Zhou, Hua, Yu, Shu‐Hong, Jiang, Hai‐Long
Format: Journal Article
Language:English
Published: Germany Wiley Subscription Services, Inc 09.07.2018
Wiley
Edition:International ed. in English
Subjects:
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
Online Access:Get full text
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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. 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.
Bibliography:These authors contributed equally to this work.
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AC02-06CH11357
USDOE Office of Science (SC), Basic Energy Sciences (BES)
ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.201803262