Olaya, Astrid J.Riva, Julieta S.Baster, DominikaSilva, Wanderson O.Pichard, FrancoisGirault, Hubert H.2022-01-312022-01-312022-01-312021-12-2710.1021/jacsau.1c00408https://infoscience.epfl.ch/handle/20.500.14299/184919WOS:000746271300001Sustainable water oxidation requires low-cost, stable, and efficient redox couples, photosensitizers, and catalysts. Here, we introduce the in situ self-assembly of metal-atom-free organic-based semiconductive structures on the surface of carbon supports. The resulting TTF/TTF center dot+@carbon junction (TTF = tetrathiafulvalene) acts as an all-in-one highly stable redox-shuttle/photosensitizer/molecular-catalyst triad for the visible-light-driven water oxidation reaction (WOR) at neutral pH, eliminating the need for metallic or organometallic catalysts and sacrificial electron acceptors. A water/butyronitrile emulsion was used to physically separate the photoproducts of the WOR, H+ and TTF, allowing the extraction and subsequent reduction of protons in water, and the in situ electrochemical oxidation of TTF to TTF center dot+ on carbon in butyronitrile by constant anode potential electrolysis. During 100 h, no decomposition of TTF was observed and O-2 was from the emulsion while H-2 was in the This work new for a new generation of metal-atom-free, low-cost, redox-driven water-splitting strategies.Chemistry, MultidisciplinaryChemistrywater oxidationhydrogen evolutionphotochemistrysustainableredox shuttlessolar-cellsredox mediatorhydrogenevolutiono-2photocatalystsphotoanodesgenerationcatalystscaffoldtext::journal::journal article::research article