Direct growth of uniform carbon nitride layers with extended optical absorption towards efficient water-splitting photoanodes
| العنوان: | Direct growth of uniform carbon nitride layers with extended optical absorption towards efficient water-splitting photoanodes |
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| المؤلفون: | Guiming Peng, Jonathan Tzadikov, Jiani Qin, Liel Abisdris, Jesús Barrio, Menny Shalom, Michael Volokh |
| المصدر: | Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020) Nature Communications |
| بيانات النشر: | Nature Portfolio, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Materials science, Science, General Physics and Astronomy, 02 engineering and technology, Substrate (electronics), 010402 general chemistry, 7. Clean energy, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, Article, Solar fuels, chemistry.chemical_compound, Photocatalysis, Absorption (electromagnetic radiation), lcsh:Science, Carbon nitride, Photocurrent, Multidisciplinary, Nanoscale materials, General Chemistry, Photoelectrochemical cell, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Chemical engineering, Hydrogen fuel, Water splitting, lcsh:Q, 0210 nano-technology, Faraday efficiency |
| الوصف: | A general synthesis of carbon nitride (CN) films with extended optical absorption, excellent charge separation under illumination, and outstanding performance as a photoanode in water-splitting photoelectrochemical cells is reported. To this end, we introduced a universal method to rapidly grow CN monomers directly from a hot saturated solution on various substrates. Upon calcination, a highly uniform carbon nitride layer with tuned structural and photophysical properties and in intimate contact with the substrate is obtained. Detailed photoelectrochemical and structural studies reveal good photoresponse up to 600 nm, excellent hole extraction efficiency (up to 62%) and strong adhesion of the CN layer to the substrate. The best CN photoanode demonstrates a benchmark-setting photocurrent density of 353 µA cm−2 (51% faradaic efficiency for oxygen), and external quantum yield value above 12% at 450 nm at 1.23 V versus RHE in an alkaline solution, as well as low onset potential and good stability. Photoelectrochemical cells (PEC) can convert sunlight and water directly to a hydrogen fuel. Here a robust metal-free carbon nitride-based layer is used as an efficient photoanode for water-splitting PEC. |
| اللغة: | English |
| تدمد: | 2041-1723 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1341e0a4b0ef715e090a9e0aad1d6dc https://doaj.org/article/127e094dbac44faf8b6ca697037b8c57 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....a1341e0a4b0ef715e090a9e0aad1d6dc |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20411723 |
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