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Visible‐Light‐Driven CO 2 Reduction with Carbon Nitride: Enhancing the Activity of Ruthenium Catalysts
Author(s) -
Kuriki Ryo,
Sekizawa Keita,
Ishitani Osamu,
Maeda Kazuhiko
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201411170
Subject(s) - ruthenium , formic acid , catalysis , carbon nitride , photocatalysis , graphitic carbon nitride , photochemistry , carbon fibers , turnover number , quantum yield , visible spectrum , nitride , chemistry , materials science , inorganic chemistry , nanotechnology , organic chemistry , fluorescence , optoelectronics , physics , layer (electronics) , quantum mechanics , composite number , composite material
A heterogeneous photocatalyst system that consists of a ruthenium complex and carbon nitride (C 3 N 4 ), which act as the catalytic and light‐harvesting units, respectively, was developed for the reduction of CO 2 into formic acid. Promoting the injection of electrons from C 3 N 4 into the ruthenium unit as well as strengthening the electronic interactions between the two units enhanced its activity. The use of a suitable solvent further improved the performance, resulting in a turnover number of greater than 1000 and an apparent quantum yield of 5.7 % at 400 nm. These are the best values that have been reported for heterogeneous photocatalysts for CO 2 reduction under visible‐light irradiation to date.