Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 17, Pages 4867-4871Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201701627
Keywords
artificial photosynthesis; carbon nitride; CO2 fixation; formate; heterogeneous photocatalysis
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Funding
- PRESTO/JST program
- JSPS [25107512, 24107005, JP16H06440, JP16H06441]
- Photon and Quantum Basic Research Coordinated Development Program (MEXT, Japan)
- CREST Program Molecular Technology (JST)
- Noguchi Institute
- Murata Research Foundation
- NIMS microstructural characterization platform as a program of Nanotechnology Platform of the MEXT, Japan
- [JP16H06130]
- Grants-in-Aid for Scientific Research [16H06440, 16H06130, 16H06441, 24107005, 25107512] Funding Source: KAKEN
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Carbon nitride nanosheets (NS-C3N4) were found to undergo robust binding with a binuclear ruthenium(II) complex (RuRu') even in basic aqueous solution. A hybrid material consisting of NS-C3N4 (further modified with nano-particulate Ag) and RuRu' promoted the photocatalytic reduction of CO2 to formate in aqueous media, in conjunction with high selectivity (approximately 98%) and a good turnover number (> 2000 with respect to the loaded Ru complex). These represent the highest values yet reported for a powder-based photocatalytic system during CO2 reduction under visible light in an aqueous environment. We also assessed the desorption of RuRu' from the Ag/C3N4 surface, a factor that can contribute to a loss of activity. It was determined that desorption is not induced by salt additives, pH changes, or photoirradiation, which partly explains the high photocatalytic performance of this material.
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