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Title
Japanese: 
English:Role of iron in the reduction of H2O2 intermediate during the oxygen reduction reaction on iron-containing polyimide-based electrocatalysts 
Author
Japanese: Azhagumuthu Muthukrishnan, 難波江 裕太, 大坂 武男.  
English: Azhagumuthu Muthukrishnan, Yuta Nabae, Takeo Ohsaka.  
Language English 
Journal/Book name
Japanese: 
English:RSC Advances 
Volume, Number, Page Vol. 6    No. 5    pp. 3774-3777
Published date Dec. 22, 2015 
Publisher
Japanese: 
English:The Royal Society of Chemistry 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://dx.doi.org/10.1039/C5RA23162K
 
DOI https://doi.org/10.1039/C5RA23162K
Abstract Understanding the role of Fe in each step of the oxygen reduction reaction (ORR) on Fe-containing N-doped carbon catalysts for the ORR in PEMFCs is of great importance in designing higher performance ORR catalysts. The direct 4-electron ORR has been found to be catalyzed by Fe whereas the importance of Fe in the consecutive 2 [times] 2-electron ORR remains unclear. The reduction of H2O2 on the Fe-containing polyimide (Fe/PI) and Fe-free polyimide (PI) catalysts was studied in acidic media using rotating disk electrode (RDE) voltammetry and the corresponding rate constants were estimated. The results demonstrate that the Fe in the Fe/PI catalyst plays a crucial role in the enhanced H2O2 reduction and consequently a consecutive 2 [times] 2-electron ORR via adsorbed H2O2 intermediate, i.e., a so-called two-site reduction process, as well as a direct 4-electron ORR could significantly contribute to the overall 4-electron ORR.

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