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Synthesis of Cobalt Sulfide/Sulfur Doped Carbon Nanocomposites with Efficient Catalytic Activity in the Oxygen Evolution Reaction
Author(s) -
Qian Huayu,
Tang Jing,
Wang Zhongli,
Kim Jeonghun,
Kim Jung Ho,
Alshehri Saad M.,
Yanmaz Ekrem,
Wang Xin,
Yamauchi Yusuke
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201604162
Subject(s) - sulfur , cobalt sulfide , cobalt , catalysis , sulfide , nanocomposite , carbon fibers , oxygen , doping , chemistry , inorganic chemistry , materials science , chemical engineering , nanotechnology , organic chemistry , composite number , electrode , electrochemistry , composite material , engineering , optoelectronics
Cobalt sulfide/sulfur doped carbon composites (Co 9 S 8 /S‐C) were synthesized by calcining a rationally designed sulfur‐containing cobalt coordination complex in an inert atmosphere. From the detailed transmission electron microscopy (TEM) and X‐ray photoelectron spectroscopy (XPS) analyses, the electrocatalytically active Co 9 S 8 nanoparticles were clearly obtained and combined with the thin sulfur doped carbon layers. Electrochemical data showed that Co 9 S 8 /S‐C had a good activity and long‐term stability in catalyzing oxygen evolution reaction in alkaline electrolyte, even better than the traditional RuO 2 electrocatalyst. The excellent electrocatalytic activity of Co 9 S 8 /S‐C was mainly attributed to the synergistic effect between the Co 9 S 8 catalyst which contributed to the oxygen evolution reaction and the sulfur doped carbon layer which facilitated the adsorption of reactants, prevented the Co 9 S 8 particles from aggregating and served as the electrically conductive binder between each component.