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Photocatalytic Conversion of CO 2 to CO by a Copper(II) Quaterpyridine Complex
Author(s) -
Guo Zhenguo,
Yu Fei,
Yang Ying,
Leung ChiFai,
Ng SiuMui,
Ko ChiChiu,
Cometto Claudio,
Lau TaiChu,
Robert Marc
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201701354
Subject(s) - triethanolamine , photocatalysis , catalysis , chemistry , copper , photochemistry , selectivity , imidazole , photosensitizer , bipyridine , solar fuel , visible spectrum , inorganic chemistry , materials science , organic chemistry , crystal structure , analytical chemistry (journal) , optoelectronics
The invention of efficient systems for the photocatalytic reduction of CO 2 comprising earth‐abundant metal catalysts is a promising approach for the production of solar fuels. One bottleneck is to design highly selective and robust molecular complexes that are able to transform the CO 2 gas. The Cu II quaterpyridine complex [Cu(qpy)] 2+ ( 1 ) is found to be a highly efficient and selective catalyst for visible‐light driven CO 2 reduction in CH 3 CN using [Ru(bpy) 3 ] 2+ (bpy: bipyridine) as photosensitizer and BIH/TEOA (1,3‐dimethyl‐2‐phenyl‐2,3‐dihydro‐1 H ‐benzo[ d ]imidazole/triethanolamine) as sacrificial reductant. The photocatalytic reaction is greatly enhanced by the presence of H 2 O (1–4 % v/v), and a turnover number of >12 400 for CO production can be achieved with 97 % selectivity, which is among the highest of molecular 3d CO 2 reduction catalysts. Results from Hg poisoning and dynamic light scattering experiments suggest that this photocatalyst is homogenous. To the best of our knowledge, 1 is the first example of molecular Cu‐based catalyst for the photoreduction of CO 2 .