Visible-light driven H evolution in water is achieved using catechol-photosensitised TiO nanoparticles with a molecular nickel catalyst. Layer-by-layer immobilisation of catechol-TiO onto tin-doped indium oxide electrodes generates photocathodic currents in the presence of an electron acceptor. This approach represents a new strategy for controlling photocurrent direction in dye-sensitised photoelectrochemical applications.
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