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Title: Hybrid photocathode consisting of a CuGaO2 p-type semiconductor and a Ru(ii)–Re(i) supramolecular photocatalyst: non-biased visible-light-driven CO2 reduction with water oxidation
Authors: Kumagai, Hiromu
Sahara, Go
Maeda, Kazuhiko
Higashi, Masanobu
Abe, Ryu  kyouindb  KAKEN_id
Ishitani, Osamu
Author's alias: 東, 正信
阿部, 竜
Issue Date: 1-Jun-2017
Publisher: Royal Society of Chemistry (RSC)
Journal title: Chemical Science
Volume: 8
Issue: 6
Start page: 4242
End page: 4249
Abstract: A CuGaO2 p-type semiconductor electrode was successfully employed for constructing a new hybrid photocathode with a Ru(II)–Re(I) supramolecular photocatalyst (RuRe/CuGaO2). The RuRe/CuGaO2 photocathode displayed photoelectrochemical activity for the conversion of CO2 to CO in an aqueous electrolyte solution with a positive onset potential of +0.3 V vs. Ag/AgCl, which is 0.4 V more positive in comparison to a previously reported hybrid photocathode that used a NiO electrode instead of CuGaO2. A photoelectrochemical cell comprising this RuRe/CuGaO2 photocathode and a CoOx/TaON photoanode enabled the visible-light-driven catalytic reduction of CO2 using water as a reductant to give CO and O2 without applying any external bias. This is the first self-driven photoelectrochemical cell constructed with the molecular photocatalyst to achieve the reduction of CO2 by only using visible light as the energy source and water as a reductant.
Rights: This journal is © The Royal Society of Chemistry 2017
This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
DOI(Published Version): 10.1039/c7sc00940b
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