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Published on: August 18, 2020
A Carbon Nitride/Fe Quaterpyridine Catalytic System for Photostimulated CO2-to-CO Conversion with Visible Light
Claudio Cometto1, Ryo Kuriki2,3, Lingjing Chen4
1Université Paris Diderot , Sorbonne Paris Cité, Laboratoire d'Electrochimie Moléculaire , UMR 7591 CNRS, 15 rue Jean-Antoine de Baïf , F-75205 Paris , Cedex 13 , France.
Abstract:
Efficient and selective photostimulated CO2-to-CO reduction by a photocatalytic system consisting of an iron-complex catalyst and a mesoporous graphitic carbon nitride (mpg-C3N4) redox photosensitizer is reported for the first time. Irradiation in the visible region (λ ≥ 400 nm) of an CH3CN/triethanolamine (4:1, v/v) solution containing [Fe(qpy)(H2O)2]2+ (qpy = 2,2':6',2'':6'',2''-quaterpyridine) and mpg-C3N4 resulted in CO evolution with 97% selectivity, a turnover number of 155, and an apparent quantum yield of ca. 4.2%. This hybrid catalytic system, comprising only earth abundant elements, opens new perspectives for solar fuels production using CO2 as a renewable feedstock.
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