Photoelectrochemical Reduction of CO2Coupled to Water Oxidation Using a Photocathode with a Ru(II)-Re(I) Complex Photocatalyst and a CoOx/TaON Photoanode.
Photoelectrochemical CO2reduction activity of a hybrid photocathode, based on a Ru(II)-Re(I) supramolecular metal complex photocatalyst immobilized on a NiO electrode (NiO-RuRe), was confirmed in an aqueous electrolyte solution. Under half-reaction conditions, the NiO-RuRe photocathode generated CO with high selectivity, and its turnover number for CO formation reached 32 based on the amount of immobilized RuRe. A photoelectrochemical cell comprising a NiO-RuRe photocathode and a CoOx/TaON photoanode showed activity for visible-light-driven CO2reduction using water as a reductant to generate CO and O2, with the assistance of an external electrical (0.3 V) and chemical (0.10 V) bias produced by a pH difference. This is the first example of a molecular and semiconductor photocatalyst hybrid-constructed photoelectrochemical cell for visible-light-driven CO2reduction using water as a reductant.
Department of Chemistry, School of Science, Tokyo Institute of Technology , O-okayama 2-12-1-NE-1, Meguro-ku, Tokyo 152-8550, Japan.
Go
G
Sahara
Department of Chemistry, School of Science, Tokyo Institute of Technology , O-okayama 2-12-1-NE-1, Meguro-ku, Tokyo 152-8550, Japan.
Hiromu
H
Kumagai
Department of Chemistry, School of Science, Tokyo Institute of Technology , O-okayama 2-12-1-NE-1, Meguro-ku, Tokyo 152-8550, Japan.
Kazuhiko
K
Maeda
Laboratoire de Chimie et Biologie des Métaux, Université Grenoble Alpes , CNRS UMR 5249, CEA, F-38000 Grenoble, France.
Nicolas
N
Kaeffer
Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
Vincent
V
Artero
Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
Masanobu
M
Higashi
Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
Ryu
R
Abe
Department of Chemistry, School of Science, Tokyo Institute of Technology , O-okayama 2-12-1-NE-1, Meguro-ku, Tokyo 152-8550, Japan.
Osamu
O
Ishitani