Journal
CHEMSUSCHEM
Volume 10, Issue 1, Pages 287-295Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201600661
Keywords
artificial photosynthesis; carbon dioxide reduction; carbon nitride; solar fuels; z-scheme
Funding
- PRESTO/JST program
- JSPS [25107512, 24107005, 16H06441]
- Photon and Quantum Basic Research Coordinated Development Program (MEXT, Japan)
- CREST program
- Noguchi Institute
- Murata Research Foundation
- [16H06130]
- Grants-in-Aid for Scientific Research [24107005, 25107512, 16H06441, 16H06130] Funding Source: KAKEN
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Photocatalytic reduction of CO2 to CO proceeded by visible light (lambda > 400 nm) using mesoporous graphitic carbon nitride (C3N4) coupled with a Ru-II-Re-I binuclear complex (RuRe) containing a photosensitizer and catalytic units. The selectivity to CO exceeded 90% during the initial stage. Photocatalytic reactions (including isotope tracer experiments) and electrochemical measurements revealed that the reaction proceeded according to a two-step photoexcitation of C3N4 and the Ru-II photosensitizer unit, that is, it followed the Z-Scheme mechanism. Modification of C3N4 with highly dispersed silica was found to improve the ability of C3N4 to accommodate RuRe, which enhanced the photocatalytic activity for CO production.
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