A broadband and strong visible-light-absorbing photosensitizer boosts hydrogen evolution
| Autor: | Song Guo, Nan Zhang, Kai-Kai Chen, Hong-Juan Wang, Ping Wang, Zhi-Ming Zhang, Tong-Bu Lu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Materials science Science General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Photochemistry Article General Biochemistry Genetics and Molecular Biology Artificial photosynthesis 03 medical and health sciences Electron transfer Photosensitizer Photocatalysis Triplet state Boron lcsh:Science Multidisciplinary Hydrogen energy General Chemistry Homogeneous catalysis 021001 nanoscience & nanotechnology 030104 developmental biology Organometallic chemistry chemistry Water splitting lcsh:Q Astrophysics::Earth and Planetary Astrophysics 0210 nano-technology Visible spectrum |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-12 (2019) Nature Communications |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/s41467-019-11099-8 |
| Popis: | Developing broadband and strong visible-light-absorbing photosensitizer is highly desired for dramatically improving the utilization of solar energy and boosting artificial photosynthesis. Herein, we develop a facile strategy to co-sensitize Ir-complex with Coumarins and boron dipyrromethene to explore photosensitizer with a broadband covering ca. 50% visible light region (Ir-4). This type of photosensitizer is firstly introduced into water splitting system, exhibiting significantly enhanced performance with over 21 times higher than that of typical Ir(ppy)2(bpy)+, and the turnover number towards Ir-4 reaches to 115840, representing the most active sensitizer among reported molecular photocatalytic systems. Experimental and theoretical investigations reveal that the Ir-mediation not only achieves a long-lived boron dipyrromethene-localized triplet state, but also makes an efficient excitation energy transfer from Coumarin to boron dipyrromethene to trigger the electron transfer. These findings provide an insight for developing broadband and strong visible-light-absorbing multicomponent arrays on molecular level for efficient artificial photosynthesis. Converting solar energy to hydrogen fuel requires light-absorbers that well-match the wavelengths of incoming sunlight. Here, authors prepare a broadband visible-light-absorbing molecular complex that efficiently produces hydrogen from water. |
| Databáze: | OpenAIRE |
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