title: Robust Binding between Carbon Nitride Nanosheets and a Binuclear Ruthenium(II) Complex Enabling Durable, Selective CO2Reduction under Visible Light in Aqueous Solution.
abstract: Carbon nitride nanosheets (NS-C3N4) were found to undergo robust binding with a binuclear ruthenium(II) complex (RuRu') even in basic aqueous solution. A hybrid material consisting of NS-C3N4(further modified with nanoparticulate Ag) and RuRu' promoted the photocatalytic reduction of CO2to formate in aqueous media, in conjunction with high selectivity (approximately 98 %) and a good turnover number (>2000 with respect to the loaded Ru complex). These represent the highest values yet reported for a powder-based photocatalytic system during CO2reduction under visible light in an aqueous environment. We also assessed the desorption of RuRu' from the Ag/C3N4surface, a factor that can contribute to a loss of activity. It was determined that desorption is not induced by salt additives, pH changes, or photoirradiation, which partly explains the high photocatalytic performance of this material.
authors.affiliation: Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Kuriki
authors.affiliation: Advanced Research Institute for Natural Science and Technology, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan.
authors.forename: Muneaki
authors.initials: M
authors.lastname: Yamamoto
authors.affiliation: Institute of Materials and Systems for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
authors.forename: Kimitaka
authors.initials: K
authors.lastname: Higuchi
authors.affiliation: Institute of Materials and Systems for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
authors.forename: Yuta
authors.initials: Y
authors.lastname: Yamamoto
authors.affiliation: Institute of Materials and Systems for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Akatsuka
authors.affiliation: Suzukakedai Materials Analysis Division, Technical Department, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.
authors.forename: Daling
authors.initials: D
authors.lastname: Lu
authors.affiliation: Institute of Materials and Systems for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
authors.forename: Shinya
authors.initials: S
authors.lastname: Yagi
authors.affiliation: Advanced Research Institute for Natural Science and Technology, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Yoshida
authors.affiliation: Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Ishitani
authors.affiliation: Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan.
authors.forename: Kazuhiko
authors.identifier: 0000-0001-7245-8318
authors.initials: K
authors.lastname: Maeda
keywords: CO2 fixation; artificial photosynthesis; carbon nitride; formate; heterogeneous photocatalysis