Visible‐Light‐Driven CO2 Reduction with Carbon Nitride: Enhancing the Activity of Ruthenium Catalysts |
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| Authors: | Ryo Kuriki Dr. Keita Sekizawa Prof. Dr. Osamu Ishitani Prof. Dr. Kazuhiko Maeda |
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| Affiliation: | 1. Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2‐12‐1‐NE‐2 Ookayama, Meguro‐ku, Tokyo 152‐8550 (Japan);2. Present address: Toyota Central Research & Development Laboratories, Inc. 41‐1, Yokomichi, Nagakute, Aichi 480‐1192 (Japan) |
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| Abstract: | A heterogeneous photocatalyst system that consists of a ruthenium complex and carbon nitride (C3N4), which act as the catalytic and light‐harvesting units, respectively, was developed for the reduction of CO2 into formic acid. Promoting the injection of electrons from C3N4 into the ruthenium unit as well as strengthening the electronic interactions between the two units enhanced its activity. The use of a suitable solvent further improved the performance, resulting in a turnover number of greater than 1000 and an apparent quantum yield of 5.7 % at 400 nm. These are the best values that have been reported for heterogeneous photocatalysts for CO2 reduction under visible‐light irradiation to date. |
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| Keywords: | artificial photosynthesis carbon dioxide fixation carbon nitride heterogeneous photocatalysis semiconductors |
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