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Synthesis of Cobalt Sulfide/Sulfur Doped Carbon Nanocomposites with Efficient Catalytic Activity in the Oxygen Evolution Reaction |
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| Authors: | Huayu Qian Dr. Jing Tang Dr. Zhongli Wang Dr. Jeonghun Kim Prof. Jung Ho Kim Prof. Saad M. Alshehri Prof. Ekrem Yanmaz Prof. Xin Wang Prof. Yusuke Yamauchi |
| Affiliation: | 1. Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, Nanjing University of Science and Technology, Nanjing, P. R. China;2. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1–1 Namiki, Tsukuba, Ibaraki, Japan;3. Australian Institute for Innovative Materials (AIIM), University of Wollongong, North Wollongong, NSW, Australia;4. Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia;5. Department of Mechatronics, Faculty of Engineering and Architecture, Gelisim University, Istanbul, Turkey |
| Abstract: | Cobalt sulfide/sulfur doped carbon composites (Co9S8/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 Co9S8 nanoparticles were clearly obtained and combined with the thin sulfur doped carbon layers. Electrochemical data showed that Co9S8/S‐C had a good activity and long‐term stability in catalyzing oxygen evolution reaction in alkaline electrolyte, even better than the traditional RuO2 electrocatalyst. The excellent electrocatalytic activity of Co9S8/S‐C was mainly attributed to the synergistic effect between the Co9S8 catalyst which contributed to the oxygen evolution reaction and the sulfur doped carbon layer which facilitated the adsorption of reactants, prevented the Co9S8 particles from aggregating and served as the electrically conductive binder between each component. |
| Keywords: | cobalt sulfide coordination complex oxygen evolution reaction sulfur doped carbon |