Photochemical Reduction of Low Concentrations of CO2 in a Porous Coordination Polymer with a Ruthenium(II)–CO Complex |
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| Authors: | Dr. Takashi Kajiwara Machiko Fujii Dr. Masahiko Tsujimoto Dr. Katsuaki Kobayashi Dr. Masakazu Higuchi Prof. Dr. Koji Tanaka Prof. Dr. Susumu Kitagawa |
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| Affiliation: | 1. ACT-Kyoto Laboratory, Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto, Japan;2. JST, PRESTO, Saitama, Japan;3. WPI-iCeMS, Kyoto University, Kyoto, Japan;4. JST, ACT-C, Saitama, Japan;5. Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan |
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| Abstract: | Direct use of low pressures of CO2 as a C1 source without concentration from gas mixtures is of great interest from an energy‐saving viewpoint. Porous heterogeneous catalysts containing both adsorption and catalytically active sites are promising candidates for such applications. Here, we report a porous coordination polymer (PCP)‐based catalyst, PCP‐RuII composite, bearing a RuII‐CO complex active for CO2 reduction. The PCP‐RuII composite showed improved CO2 adsorption behavior at ambient temperature. In the photochemical reduction of CO2 the PCP‐RuII composite produced CO, HCOOH, and H2. Catalytic activity was comparable with the corresponding homogeneous RuII catalyst and ranks among the highest of known PCP‐based catalysts. Furthermore, catalytic activity was maintained even under a 5 % CO2/Ar gas mixture, revealing a synergistic effect between the adsorption and catalytically active sites within the PCP‐RuII composite. |
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| Keywords: | carbon dioxide fixation metal– organic frameworks microporous materials photocatalysis ruthenium |
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