Increase in CO2 reduction rate via optical near-field effect
| Autor: | Tomoko Yoshida, Yosuke Suzuki, Kenji Iida, Takashi Yatsui, Katsuyuki Nobusada, Yuma Kato, Yuichi Negishi, Muneaki Yamamoto, Tatsuki Morimoto, Wataru Kurashige, Yuki Nakamura, Nobuyuki Shimizu |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Near-field optics 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Dissociation (chemistry) Electronic Optical and Magnetic Materials 010309 optics Metal Heat generation visual_art 0103 physical sciences visual_art.visual_art_medium Ultraviolet light Water splitting Optoelectronics 0210 nano-technology business Plasmon Visible spectrum |
| Zdroj: | Journal of Nanophotonics. 14 |
| ISSN: | 1934-2608 |
| Popis: | To reduce the effects of global warming, visible and near-infrared light must be used more efficiently. Deep ultraviolet light (8 eV) is required for the direct dissociation of CO2 by light; however, the introduction of a metal complex has made it possible to realize CO2 reduction with visible light. We demonstrate that the optical near field (ONF) can increase the CO2 reduction rate. For this, we used gold clusters, because they can be a suitable source for ONFs, as their size and density can be controlled by the number of gold atoms. By attaching a metal complex near gold clusters with diameters of 1.0 to 1.3 nm, we confirm that the reduction rate of CO2 to CO increased by 1.5 to 2.1 times. The gold clusters were sufficiently small; therefore, there was no plasmonic resonant peak or heat generation. Because the near-field effect is based on a photochemical reaction, it can be applied to other metal complexes used in CO2 reduction, and it has other applications such as water splitting and water purification. |
| Databáze: | OpenAIRE |
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