Development of robust, all-inorganic heteronuclear assemblies with hierarchically arranged components for closing the photosynthetic cycle of carbon dioxide reduction by water with sun light is a formidable challenge. Herein, we have developed a new synthetic method, the photochemical deposition of a metal oxide catalyst for water oxidation (IrOx) next to a binuclear ZrOCo unit anchored on mesoporous silica support (SBA-15), and achieved the efficient use of IrOx for oxygen evolution. At the same time, the excited ZrOCo unit splits CO2 to CO. As a result, the photochemical CO2 reduction was successfully accomplished for generating CO and O2 in the presence of water as an electron donor in IrOx-ZrOCoII-SBA-15. This is the first demonstration of closing the photosynthetic cycle of CO2 reduction by water at a precisely defined nanoscale polynuclear unit. In addition, using the photodeposition technique, the recent results of meltielectron transfer catalysts for CO2 reduction will be discussed.

Photocatalytic CO<sub>2</sub> reduction by water using Ir oxide cluster coupled to polynuclear ZrOCo unit in mesoporous silica

248th National Meeting (2014)

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Photocatalytic CO2 reduction by water using Ir oxide cluster coupled to polynuclear ZrOCo unit in mesoporous silica

Photocatalytic CO₂ reduction by water using Ir oxide cluster coupled to polynuclear ZrOCo unit in mesoporous silica