Selective CO2 conversion to formate conjugated with H2O oxidation utilizing semiconductor/complex hybrid photocatalysts |
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Authors: | Sato Shunsuke Arai Takeo Morikawa Takeshi Uemura Keiko Suzuki Tomiko M Tanaka Hiromitsu Kajino Tsutomu |
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Institution: | Toyota Central Research and Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan. ssato@mosk.tytlabs.co.jp |
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Abstract: | Photoelectrochemical reduction of CO(2) to HCOO(-) (formate) over p-type InP/Ru complex polymer hybrid photocatalyst was highly enhanced by introducing an anchoring complex into the polymer. By functionally combining the hybrid photocatalyst with TiO(2) for water oxidation, selective photoreduction of CO(2) to HCOO(-) was achieved in aqueous media, in which H(2)O was used as both an electron donor and a proton source. The so-called Z-scheme (or two-step photoexcitation) system operated with no external electrical bias. The selectivity for HCOO(-) production was >70%, and the conversion efficiency of solar energy to chemical energy was 0.03-0.04%. |
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