Open AccessPhotoelectrochemical Reduction of CO2 Coupled to Water Oxidation Using a Photocathode with a Ru(II)–Re(I) Complex Photocatalyst and a CoOx/TaON Photoanode
Author(s) -
Go Sahara,
Hiromu Kumagai,
Kazuhiko Maeda,
Nicolas Kaeffer,
Vincent Artero,
Masanobu Higashi,
Ryu Abe,
Osamu Ishitani
Publication year - 2016
Publication title -
journal of the american chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/jacs.6b09212
Subject(s) - photocathode , non blocking i/o , chemistry , photocatalysis , photoelectrochemical cell , visible spectrum , electrolyte , water splitting , aqueous solution , photoelectrochemistry , electrochemistry , photochemistry , inorganic chemistry , electrode , catalysis , optoelectronics , materials science , physics , biochemistry , electron , quantum mechanics
Photoelectrochemical CO 2 reduction 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 CoO x /TaON photoanode showed activity for visible-light-driven CO 2 reduction using water as a reductant to generate CO and O 2 , 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 CO 2 reduction using water as a reductant.