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One‐Step Production of Sulfur and Nitrogen Co‐doped Graphitic Carbon for Oxygen Reduction: Activation Effect of Oxidized Sulfur and Nitrogen
Author(s) -
Wang Jing,
Xu Zheng,
Gong Yutong,
Han Chuanlong,
Li Haoran,
Wang Yong
Publication year - 2014
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201301102
Subject(s) - sulfur , pyrolysis , melamine , chemistry , nitrogen , carbon fibers , inorganic chemistry , electrochemistry , oxygen , nuclear chemistry , materials science , organic chemistry , electrode , composite number , composite material
Oxidized sulfur and nitrogen co‐doped graphitic carbon (SN‐G) was one‐step synthesized simply by annealing a solid mixture of D ‐glucosamine hydrochloride, melamine, and trithiocyanuric acid. By tailoring the additive dosage and the pyrolysis temperature, correlations between the structure, composition, and electrochemical performance of SN‐G were systematically elucidated. To our excitement, the SN 3 ‐G sample pyrolyzed at 900 °C with a dominant oxidized sulfur content exhibited striking electrocatalytic activity in alkaline medium, which was free from the crossover effect, and its long‐term durability was superior to that of commercial Pt/C (20 wt %). Furthermore, oxidized sulfur that was reported to be chemically inactive for the ORR was proven to be active, which was supported by both experimental results and density functional theory calculations.