Salt-templated synthesis of Co9S8 nanoparticles anchored on N, S co-doped carbon nanosheets towards high-performance water oxidation
| Autor: | Huan Liu, Shu-Chao Sun, Yue Du, Fei-Xiang Ma, Liang Zhen, Cheng-Yan Xu |
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| Rok vydání: | 2019 |
| Předmět: |
Tafel equation
General Chemical Engineering Oxygen evolution chemistry.chemical_element 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Analytical Chemistry Catalysis chemistry Transition metal Chemical engineering Electrochemistry Water splitting 0210 nano-technology Cobalt Carbon |
| Zdroj: | Journal of Electroanalytical Chemistry. 835:67-72 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2019.01.010 |
| Popis: | Transition metal sulfides are promising non-noble metal catalysts for water oxidation, a vital half reaction of electrocatalytic water splitting. However, the realization of tunable electronic structure and synergetic catalysis of cobalt sulfides is still a challenge. In this work, a salt-templating route was adopted to embed uniform Co9S8 nanoparticles into high-conductive N, S co-doped carbon nanosheets (Co9S8/N,S-CNs). Benefiting from the abundant catalytic active sites and optimized electronic structure, the as-prepared Co9S8/N,S-CNs exhibited high efficiency with a low overpotential of 325 mV to afford current density of 10 mA cm−2 and low Tafel slope of 86.3 mV dec−1 towards oxygen evolution in 1 M KOH alkaline electrolyte. |
| Databáze: | OpenAIRE |
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