High-entropy oxynitride as a low-bandgap and stable photocatalyst for hydrogen production
| Autor: | Motonori Watanabe, Tatsumi Ishihara, Parisa Edalati, Masayoshi Fuji, Xiao Feng Shen, Kaveh Edalati, Makoto Arita |
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| Rok vydání: | 2021 |
| Předmět: |
Photocurrent
Materials science Renewable Energy Sustainability and the Environment business.industry Band gap 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Metal visual_art Photocatalysis visual_art.visual_art_medium Optoelectronics General Materials Science Chemical stability Electron configuration 0210 nano-technology business Photocatalytic water splitting Hydrogen production |
| Zdroj: | Journal of Materials Chemistry A. 9:15076-15086 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/d1ta03861c |
| Popis: | Metal oxynitrides are promising photocatalysts due to their narrow bandgap, but their lower stability compared to metal oxides is a drawback. The introduction of high-entropy alloys with entropy-stabilization features has shown high potential for various functional applications in recent years. By considering these two types of materials, we developed a high-entropy oxynitride for photocatalytic water splitting. The material, with a general composition of TiZrHfNbTaO6N3 and a d0 electronic configuration, showed a narrow bandgap of 1.6 eV, which is much lower than the bandgaps of relevant binary and high-entropy oxides. The material exhibited photocurrent generation and photocatalytic hydrogen production with high chemical stability, suggesting the high potential of high-entropy oxynitrides as advanced low-bandgap and stable photocatalysts. |
| Databáze: | OpenAIRE |
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