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Dual‐Functional NaCl Template Strategy towards Synthesis of Metal‐Free Sulfur/nitrogen co‐Doped Carbon Nanosheets Catalysts for Oxygen Reduction Reaction
Author(s) -
Chen Changli,
Ma Jun,
Yu Yue,
Xiao Dejian,
Luo Qiaomei,
Ma Jie,
Liao Yi,
Zuo Xia
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801183
Subject(s) - catalysis , carbonization , nanosheet , sulfur , methanol , carbon fibers , materials science , inorganic chemistry , oxygen , aniline , nitrogen , chemical engineering , metal , chemistry , adsorption , nanotechnology , composite number , organic chemistry , engineering , composite material , metallurgy
Developing eco‐friendly, high‐efficiency and cost‐effective catalysts for oxygen reduction reaction are significantly crucial for the application of direct‐methanol fuel cells. The metal‐free sulfur/nitrogen in‐situ co‐doped carbon nanosheets are prepared through polymerization process and carbonization process using aniline as a nitrogen source, 4‐aminobenzenesulfonamide as a sulfur source and NaCl as a template and protective layer. The obtained catalysts show the obvious two dimensional nanosheet structure with successful doping of S and N. Benefiting from high contents of S atoms and N atom, high special surface area and graphitic degree, well‐ordered micropores and synergetic interaction between thiophenic‐S, pyridinic N and graphitic N, the optimal catalyst S3/N‐CNS800 shows excellent oxygen reduction performance with 13.2 mV more positive half‐wave potential than that of 20% Pt/C, superior long‐term durability and tolerance to methanol crossover.