| 초록 |
This work introduces a photocatalytic, highly formate-selective CO2 reduction using a ruthenium bipyridine molecular catalyst on the surface of plasmonic Au/TiO2 junctioned nanostructure. The advantage of the use of a molecular catalyst is a high selectivity (＞90 % selectivity) toward a desired product, formic acid. The molecular catalyst carrying phosphonate groups make stable adhesion on highly oxophilic TiO2 surface. Light (＞ 400 nm) promotes hot electron generation from gold nanoparticles by surface plasmon resonance, and molecular catalyst receives the electrons to reduce CO2 into formic acid in aqueous electrolyte without organic solvent as additives. The results represent our photochemical CO2 reduction method is a sustainable and environment-friendly strategy to use solar energy in producing useful resources. This work was supported by the Korea CCS R&D Center (KCRC) grant funded by the Korea government (Ministry of Science, ICT & Future Planning) (NRF-2014M1A8A1049303). |
