title: Photochemical Reduction of Low Concentrations of CO2 in a Porous Coordination Polymer with a Ruthenium(II)-CO Complex.
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-Ru(II) composite, bearing a Ru(II) -CO complex active for CO2 reduction. The PCP-Ru(II) composite showed improved CO2 adsorption behavior at ambient temperature. In the photochemical reduction of CO2 the PCP-Ru(II) composite produced CO, HCOOH, and H2 . Catalytic activity was comparable with the corresponding homogeneous Ru(II) 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-Ru(II) composite.
authors.affiliation: ACT-Kyoto Laboratory, Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, 105 Jibucho, Fushimi-ku, Kyoto, 612-8374, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kajiwara
authors.affiliation: ACT-Kyoto Laboratory, Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, 105 Jibucho, Fushimi-ku, Kyoto, 612-8374, Japan.
authors.forename: Machiko
authors.initials: M
authors.lastname: Fujii
authors.affiliation: ACT-Kyoto Laboratory, Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, 105 Jibucho, Fushimi-ku, Kyoto, 612-8374, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Tsujimoto
authors.affiliation: ACT-Kyoto Laboratory, Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, 105 Jibucho, Fushimi-ku, Kyoto, 612-8374, Japan.
authors.forename: Katsuaki
authors.initials: K
authors.lastname: Kobayashi
authors.affiliation: ACT-Kyoto Laboratory, Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, 105 Jibucho, Fushimi-ku, Kyoto, 612-8374, Japan.|JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
authors.forename: Masakazu
authors.initials: M
authors.lastname: Higuchi
authors.affiliation: ACT-Kyoto Laboratory, Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, 105 Jibucho, Fushimi-ku, Kyoto, 612-8374, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Tanaka
authors.affiliation: ACT-Kyoto Laboratory, Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, 105 Jibucho, Fushimi-ku, Kyoto, 612-8374, Japan. kitagawa@icems.kyoto-u.ac.jp.|WPI-iCeMS, Kyoto University, Yoshida Ushinomiyacho, Sakyo-ku, Kyoto, 606-8501, Japan. kitagawa@icems.kyoto-u.ac.jp.|JST, ACT-C, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan. kitagawa@icems.kyoto-u.ac.jp.|Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan. kitagawa@icems.kyoto-u.ac.jp.
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitagawa
keywords: carbon dioxide fixation; metal-organic frameworks; microporous materials; photocatalysis; ruthenium