Highly Efficient and Robust Photocatalytic Systems for CO2 Reduction Consisting of a Cu(I) Photosensitizer and Mn(I) Catalysts
| Autor: | Hiroyuki Takeda, Toshihide Mizutani, Hiroko Kamiyama, Osamu Ishitani, Kazuhide Koike, Akiko Sekine, Mina Irimajiri, Kouhei Okamoto |
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| Rok vydání: | 2018 |
| Předmět: |
Steric effects
Chemistry Inorganic chemistry Quantum yield 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Redox Catalysis 0104 chemical sciences Turnover number Colloid and Surface Chemistry Photocatalysis Photosensitizer 0210 nano-technology Selectivity |
| Zdroj: | Journal of the American Chemical Society. 140:17241-17254 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.8b10619 |
| Popis: | The development of highly efficient, selective, and durable photocatalytic CO2 reduction systems that only use earth-abundant elements is key for both solving global warming and tackling the shortage of energy and carbon resources. Here, we successfully developed CO2 reduction photocatalysts using [Cu2(P2bph)2]2+ (CuPS) (P2bph = 4,7-diphenyl-2,9-di(diphenylphosphinotetramethylene)-1,10-phenanthroline) as a redox photosensitizer and fac-Mn(X2bpy)(CO)3Br (Mn(4X)) (X2bpy = 4,4′-X2-2,2′-bipyridine (X = −H and −OMe) or Mn(6mes) (6mes = 6,6′-(mesityl)2-2,2′-bipyridne)) as the catalyst. The most efficient photocatalysis was achieved by Mn(4OMe): The total quantum yield of CO2 reduction products was 57%, the turnover number based on the Mn catalyst was over 1300, and the selectivity of CO2 reduction was 95%. Electronic and steric effects of the substituents (X) in the Mn complexes largely affected both the photocatalytic efficiency and the product selectivity. For example, the highest selectivity of CO formation ... |
| Databáze: | OpenAIRE |
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