La0.4Sr0.6Co0.7Fe0.2Nb0.1O3-δ perovskite prepared by the sol-gel method with superior performance as a bifunctional oxygen electrocatalyst
| Autor: | Longjiao Yu, Duo Geng, Na Xu, Tenglong Zhu, Mengzhen Sun, Zhanlin Xu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Oxygen evolution Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrocatalyst 01 natural sciences Oxygen 0104 chemical sciences Catalysis chemistry.chemical_compound Fuel Technology Adsorption Chemical engineering chemistry 0210 nano-technology Bifunctional Perovskite (structure) |
| Zdroj: | International Journal of Hydrogen Energy. 45:30583-30591 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.08.105 |
| Popis: | The advancement of efficient noble-metal-free electrocatalysts for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is crucially important for energy storage devices such as fuel cells and metal-air batteries. This paper reports the development of a novel bifunctional perovskite, La0.4Sr0.6Co0.7Fe0.2Nb0.1O3-δ (LSCFN). The crystal structure, morphology, adsorption, valence, and oxygen catalytic activity of LSCFN were systematically studied. In addition, an investigation of the influence of the synthetic method on the oxygen catalytic activity was performed. Sol-gel and solid-phase methods were applied for the synthesis of LSCFN, and the resulting perovskites were denoted as LSCFN-SG and LSCFN-SP, respectively. The catalyst LSCFN-SG exhibited excellent bifunctional catalytic activity, with a low overpotential (360 mV) and superior stability in the OER. Subsequently, LSCFN-SG was used as the cathode catalyst in an aluminum-air battery and exhibited a high power density. The results of this study indicate that LSCFN-SG is a promising bifunctional oxygen electrocatalyst for metal-air batteries. |
| Databáze: | OpenAIRE |
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