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S‐Doping of an Fe/N/C ORR Catalyst for Polymer Electrolyte Membrane Fuel Cells with High Power Density
Author(s) -
Wang YuCheng,
Lai YuJiao,
Song Lin,
Zhou ZhiYou,
Liu JianGuo,
Wang Qiang,
Yang XiaoDong,
Chen Chi,
Shi Wei,
Zheng YanPing,
Rauf Muhammad,
Sun ShiGang
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201503159
Subject(s) - catalysis , electrolyte , proton exchange membrane fuel cell , electrocatalyst , carbon black , doping , polymer , cathode , membrane , carbon fibers , power density , materials science , inorganic chemistry , chemical engineering , chemistry , electrochemistry , electrode , organic chemistry , composite material , power (physics) , biochemistry , natural rubber , optoelectronics , quantum mechanics , physics , composite number , engineering
Fe/N/C is a promising non‐Pt electrocatalyst for the oxygen reduction reaction (ORR), but its catalytic activity is considerably inferior to that of Pt in acidic medium, the environment of polymer electrolyte membrane fuel cells (PEMFCs). An improved Fe/N/C catalyst (denoted as Fe/N/C‐SCN) derived from Fe(SCN) 3 , poly‐m‐phenylenediamine, and carbon black is presented. The advantage of using Fe(SCN) 3 as iron source is that the obtained catalyst has a high level of S doping and high surface area, and thus exhibits excellent ORR activity (23 A g −1 at 0.80 V) in 0.1 M H 2 SO 4 solution. When the Fe/N/C‐SCN was applied in a PEMFC as cathode catalyst, the maximal power density could exceed 1 W cm −2 .