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Highly Efficient Oxygen Reduction Reaction Electrocatalysts FeCo−N−C Derived from Two Metallomacrocycles and N‐doped Porous Carbon Materials
Author(s) -
Jin Xinxin,
Xie Yan,
Wang Lili,
Huang Jiahui
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901875
Subject(s) - electrocatalyst , carbon fibers , methanol , oxygen reduction reaction , pyrolysis , materials science , oxygen reduction , phthalocyanine , doping , oxygen , chemical engineering , porosity , chemistry , nanotechnology , electrochemistry , composite number , electrode , organic chemistry , composite material , optoelectronics , engineering
N‐doped porous carbon (NPC) materials are beneficial to anchor desirable active sites for the oxygen reduction reaction (ORR). Herein, FeCo−N−C electrocatalysts with large specific surface areas and 3D interconnected hierarchical porous structures were prepared by pyrolysis of NPC materials with two metallomacrocycles, including iron phthalocyanine (FePc) and vitamin B12 (VB12). The onset potential ( E onset ) of FePc(3)VB12(1)/NPC (900) is 0.934 V ( vs . RHE), which is larger than that of commercial Pt/C (0.923 V vs . RHE). The half‐wave potential ( E 1/2 ) of FePc(3)VB12(1)/NPC (900) is 0.838 V ( vs . RHE), which is almost the same with that of Pt/C electrocatalyst (0.839 V vs . RHE). Furthermore, the FePc(3)VB12(1)/NPC (900) also exhibits better durability and methanol tolerance relative to Pt/C in 0.1 M KOH solution. Such outstanding ORR performance is mainly attributed to the high proportion of both pyridinic N and graphitic N in FePc(3)VB12(1)/NPC (900) electrocatalyst.