439669 Efficient Photocatalysts for CO2 Reduction

Monday, November 9, 2015: 10:00 AM
155D (Salt Palace Convention Center)
Osamu Ishitami, Department of Chemistry, Tokyo Institute of Technology, Tokyo, Japan

Both the problems of the global warming and shortage of the fossil resources have brought about great interest in photochemical utilization of CO2 with solar energy.   Efficient photocatalysts for CO2 reduction must be necessary for development of such an important technology.

We have developed novel types of photocatalytic systems using metal complexes and/or semiconductors as a photocatalyst.   I will focus on the following systems in my presentation.

(1)   Architecture of supramolecular photocatalysts driven with visible light, which can efficiently reduce CO2 selectively to CO or HCOOH.1

(2)   Z-scheme type photocatalysts by using hybrids composed with the supramolecular photocatalyst and a semiconductor, which can reduce CO2 with methanol as an electron donor (Scheme).2


1. Gholamkhass, B.; Mametsuka, H.; Koike, K.; Tanabe, T.; Furue, M.; Ishitani, O. Inorg. Chem. 2005, 44, 2326; Sato, S.; Koike, K.; Inoue, H.; Ishitani, O. Photochem. Photobiol. Sci. 2007, 6, 454; Koike, K.; Naito, S.; Sato, S.; Tamaki, Y.; Ishitani, O. J Photochem. Photobiol. A: Chem. 2009, 207, 109; Tamaki, Y.; Watanabe, K.; Koike, K.; Inoue, H.; Morimoto, T.; Ishitani, O. Faraday Discuss. 2012, 155, 115; Tamaki, Y.; Morimoto, T.; Koike, K.; Ishitani, O. Proc. Natl. Acad. Sci. USA 2012, 109, 15673; Tamaki, Y.; Koike, K.; Morimoto, T.; Yamazaki, Y.; Ishitani, O. Inorg. Chem. 2013, 52, 11902; Tamaki, Y.; Koike, K.; Morimoto, T.; Ishitani, O. J. Catal. 2013, 304, 22; Nakada, A.; Koike, K.; Nakashima, T.; Morimoto, T.; Ishitani, O. Inorg. Chem. 2015, 54, 1800; Kato, E.; Takeda, H.; Koike, K.; Ohkubo, K.; Ishitani, O. Chemical Science 2015, 6, 3003; Tamaki, Y.; Koike, K.; Morimoto, T.; Yamazaki, Y.; Ishitani, O. Inorg. Chem. 2013, 52, 11902.

2. Sekizawa, K.; Maeda, K.; Domen, K.; Koike, K.; Ishitani, O. J. Am. Chem. Soc. 2013, 135, 4596.

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