Ketjen black carbon supported CoO@Co?N?C nanochains as an efficient electrocatalyst for oxygen evolution |
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| Authors: | Guiyu Liu Jinlong Liu Beibei Liu Chunming Yang Dong Qian Junhua Li |
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| Affiliation: | 1. Hunan Provincial Key Laboratory of Chemical Power Resources, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China;2. Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, College of Chemistry and Material Science, Hengyang Normal University, Hengyang, 421008, PR China;3. College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, PR China |
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| Abstract: | We demonstrate an extremely facile in-situ pyrolysis followed by the reduction of partial Co2+ route to synthesize novel Ketjen black carbon (KB) supported CoO@Co?N?C (denoted as CoO@Co?NC/KB) nanochains using KB, urea and cobalt (Ⅱ) acetate as co-precursors. The as-prepared CoO@Co-NC/KB displays higher electrocatalytic activity, smaller Tafel slope and better durability for the oxygen evolution reaction than those of the benchmark commercial RuO2 catalyst in 1.0 M KOH solution, far outperforming the control groups (i.e. CoO@Co?g-C3N4/KB, Co?NC/KB, CoO?NC/KB, CoO@Co/KB, CoO@Co?NC and Co3O4?NC/KB). The remarkable electrocatalytic performance of CoO@Co?NC/KB is primarily credited to the synergistic effect between Co and CoO species with a core-shell structure, increased active sites and considerably enhanced electronic conductivity. |
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| Keywords: | CoO@Co?N?C Ketjen black carbon Electrocatalyst Oxygen evolution reaction Synergistic effect |
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