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Title
Japanese:Fourteen-Membered Macrocyclic Fe Complexes Inspired by FeN4-Center-Embedded Graphene for Oxygen Reduction Catalysis 
English:Fourteen-Membered Macrocyclic Fe Complexes Inspired by FeN4-Center-Embedded Graphene for Oxygen Reduction Catalysis 
Author
Japanese: Makoto Moriya, Ryo Takahama, Kazuki Kamoi, Junya Ohyama, Shin Kawashima, Ryoichi Kojima, Mariko Okada, Teruaki Hayakawa, Yuta Nabae.  
English: Makoto Moriya, Ryo Takahama, Kazuki Kamoi, Junya Ohyama, Shin Kawashima, Ryoichi Kojima, Mariko Okada, Teruaki Hayakawa, Yuta Nabae.  
Language English 
Journal/Book name
Japanese:The Journal of Physical Chemistry C 
English:The Journal of Physical Chemistry C 
Volume, Number, Page Vol. 124    No. 38    pp. 20730-20735
Published date Aug. 17, 2020 
Publisher
Japanese:American Chemical Society 
English:American Chemical Society 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://doi.org/10.1021/acs.jpcc.0c05536
 
DOI https://doi.org/10.1021/acs.jpcc.0c05536
Abstract For the broad application of polymer electrolyte fuel cells (PEFCs), the development of nonprecious-metal (NPM) catalysts for oxygen reduction is extremely important. To date, many NPM catalysts have been synthesized by pyrolyzing Fe-, N-, and C-containing precursors; however, they suffer from low density and uncertain chemical structure of their active sites. This study reports a novel 14-membered macrocyclic Fe complex, which was inspired by FeN4 centers in pyrolyzed catalysts, unlike typical macrocyclic MN4 complexes that have 16-membered rings. This 14-membered macrocycle possesses strong Fe窶哲 bonds with an average bond distance of 1.90 ﾃ�, as evidenced by single-crystal X-ray diffraction (XRD), which are markedly shorter than those in porphyrin (2.0 ﾃ�). This complex demonstrates high electrocatalytic activity for oxygen reduction in both acidic and basic media.

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