Home >

news Help

Publication Information


Title
Japanese:Magnetic purification of non-precious metal fuel cell catalysts for obtaining atomically dispersed Fe centers 
English:Magnetic purification of non-precious metal fuel cell catalysts for obtaining atomically dispersed Fe centers 
Author
Japanese: Yuta Nabae, Shinsuke Nagata, Keizo Kusaba, Tsutomu Aoki, Teruaki Hayakawa, Hajime Tanida, Hideto Imai, Katsuaki Hori, Yuta Yamamoto, Shigeo Arai, Junya Ohyama.  
English: Yuta Nabae, Shinsuke Nagata, Keizo Kusaba, Tsutomu Aoki, Teruaki Hayakawa, Hajime Tanida, Hideto Imai, Katsuaki Hori, Yuta Yamamoto, Shigeo Arai, Junya Ohyama.  
Language English 
Journal/Book name
Japanese:Catalysis Science & Technology 
English:Catalysis Science & Technology 
Volume, Number, Page Vol. 10    No. 2    pp. 493-501
Published date Dec. 2019 
Publisher
Japanese:The Royal Society of Chemistry 
English:The Royal Society of Chemistry 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://dx.doi.org/10.1039/C9CY02304F
 
DOI https://doi.org/10.1039/C9CY02304F
Abstract The development of non-precious metal oxygen reduction catalysts is vital for enabling the commercialization of proton exchange membrane fuel cells, and Fe/N/C catalysts prepared by the pyrolysis of Fe, N, and C-containing precursors have been widely studied for this purpose. The role of atomically dispersed Fe centers in the reaction mechanisms of Fe/N/C catalysts has been widely studied. This paper demonstrates a facile magnetic purification approach for obtaining atomically dispersed Fe centers for conducting superior Fe/N/C catalysis. Upon treatment of a Fe/N/C catalyst prepared by pyrolyzing Fe-containing polyimide nanoparticles with a magnet, the clustered Fe species (metallic Fe and Fe3C) observed before the purification were successfully eliminated, and atomically dispersed Fe species were clearly observed by microscopy. Comparison of the oxygen reduction activities of the Fe/N/C catalysts before and after the magnetic purification in half-cell and fuel cell testing revealed the retention of the high catalytic performances of the Fe/N/C catalysts. Furthermore, no loss in catalytic performance or durability was observed after the magnetic purification.

©2007 Tokyo Institute of Technology All rights reserved.