title: Artificial Z-scheme constructed with a supramolecular metal complex and semiconductor for the photocatalytic reduction of CO2.
abstract: A hybrid for the visible-light-driven photocatalytic reduction of CO2 using methanol as a reducing agent was developed by combining two different types of photocatalysts: a Ru(II) dinuclear complex (RuBLRu') used for CO2 reduction is adsorbed onto Ag-loaded TaON (Ag/TaON) for methanol oxidation. Isotope experiments clearly showed that this hybrid photocatalyst mainly produced HCOOH (TN = 41 for 9 h irradiation) from CO2 and HCHO from methanol. Therefore, it converted light energy into chemical energy (ΔG° = +83.0 kJ/mol). Photocatalytic reaction proceeds by the stepwise excitation of Ag/TaON and the Ru dinuclear complex on Ag/TaON, similar to the photosynthesis Z-scheme.
authors.affiliation: Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-1, O-okayama, Tokyo 152-8550, Japan.
authors.forename: Keita
authors.initials: K
authors.lastname: Sekizawa
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Maeda
authors.forename: Kazunari
authors.initials: K
authors.lastname: Domen
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Koike
authors.forename: Osamu
authors.initials: O
authors.lastname: Ishitani