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Highly durable carbon supported FeN nanocrystals feature as efficient bi‐functional oxygen electrocatalyst
Author(s) -
Bhuvanendran Narayanamoorthy,
Ravichandran Sabarinathan,
Peng Kai,
Jayaseelan Santhana Sivabalan,
Xu Qian,
Su Huaneng
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5524
Subject(s) - tafel equation , electrocatalyst , bifunctional , oxygen evolution , catalysis , mesoporous material , carbon fibers , oxygen , nanocrystal , chemical engineering , chemistry , limiting current , hydrothermal circulation , materials science , inorganic chemistry , nanotechnology , electrochemistry , composite number , electrode , organic chemistry , composite material , engineering
Summary The mesoporous carbon layers protected FeN nanocrystals ( FeN C syn ) was successfully synthesized by a simple hydrothermal approach and displays an improved oxygen bi‐functional performance. The high specific surface area, mesoporous and graphitic carbon with more active sites of FeN x and Fe 3 C/Fe in FeN C syn favors good synergistic electrocatalytic effect toward oxygen reduction and oxygen evolution reactions (ORR and OER) in alkaline medium. The bi‐functional activity of FeN C syn was clearly observed from the earlier onset potential of 0.86 V and limiting current density of 5.23 mA cm −2 for ORR, as well as the low over potential of 470 mV with small Tafel slope value of 84 mV dec −1 for OER. The enhanced stability and improved oxygen bifunctional activity of FeN C syn catalyst was evidently demonstrated through an innovative synthesis approach for the development of earth‐abundant metal catalysts for energy applications.