Origin of the enhanced oxygen evolution reaction activity and stability of a nitrogen and cerium co-doped CoS2 electrocatalyst
| العنوان: | Origin of the enhanced oxygen evolution reaction activity and stability of a nitrogen and cerium co-doped CoS2 electrocatalyst |
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| المؤلفون: | Weidong Shi, Wenshu Yang, Longhua Li, Wei Luo, Jinhui Hao |
| المصدر: | Journal of Materials Chemistry A. 8:22694-22702 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Materials science, Renewable Energy, Sustainability and the Environment, Heteroatom, Rational design, Oxygen evolution, chemistry.chemical_element, 02 engineering and technology, General Chemistry, Overpotential, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrocatalyst, 01 natural sciences, 0104 chemical sciences, Catalysis, Cerium, Chemical engineering, chemistry, Water splitting, General Materials Science, 0210 nano-technology |
| الوصف: | Electrochemical water splitting is a promising technology to enable a sustainable energy supply; however, it remains a formidable challenge to find efficient and stable electrocatalysts. Particularly, oxygen evolution, the half-reaction at the anode, imposes serious overpotential penalties due to its sluggish kinetics. The continued rational design and optimization of OER catalysts via different strategies such as chemical substitution provide an understanding of the way that catalytic properties can be finely tuned. Here, we show a facile synthetic approach involving a Ce(NO3)3 precursor to yield a nitrogen and cerium co-doped CoS2 electrocatalyst. Remarkably, it requires an overpotential of only 190 mV to reach a current density of 10 mA cm−2 and exhibits long-term stability for 120 h. More importantly, a suite of advanced characterization techniques and theoretical calculations reveal complementary roles of the dual dopants which stabilize the intermediates as a result of the formation of two higher oxidation state metal active centers and maintain the surface structure. This work correlates the electronic structure and heteroatom doping, providing insights into electrochemical activity and stability and guiding the rational design of efficient electrocatalysts. |
| تدمد: | 2050-7496 2050-7488 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::1e726856b3bddcf2eda1b9ec13c5630c https://doi.org/10.1039/d0ta07163c |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........1e726856b3bddcf2eda1b9ec13c5630c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20507496 20507488 |
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