Open AccessPhotocatalytic Reduction of Low Concentration of CO2
Author(s) -
Takehiko Nakajima,
Yusuke Tamaki,
Kazunori Ueno,
Eishiro Kato,
Tetsuya Nishikawa,
Kei Ohkubo,
Yasuomi Yamazaki,
Tatsuki Morimoto,
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.6b08824
Subject(s) - photocatalysis , chemistry , catalysis , photochemistry , photosensitizer , organic chemistry
A novel molecular photocatalytic system with not only high reduction ability of CO 2 but also high capture ability of CO 2 has been developed using a Ru(II)-Re(I) dinuclear complex as a photocatalyst. By using this photocatalytic system, CO 2 of 10% concentration could be selectively converted to CO with almost same photocatalysis to that under a pure CO 2 atmosphere (TON CO > 1000, Φ CO > 0.4). Even 0.5% concentration of CO 2 was reduced with 60% initial efficiency of CO formation by using the same system compared to that using pure CO 2 (TON CO > 200). The Re(I) catalyst unit in the photocatalyst can efficiently capture CO 2 , which proceeds CO 2 insertion to the Re-O bond, and then reduce the captured CO 2 by using an electron supplied from the photochemically reduced Ru photosensitizer unit.