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Chlorophylls (Chls) are naturally occurring photosensitizers having an excellent visible and near-infrared light absorption property. Herein, we employ three Chl a derivatives as sensitizers in a TiO2-based photocatalytic system for H2 evolution with ascorbic acid as the sacrificial reagent under visible light (λ > 400 nm). The H2-evolution activity of these Chl a derivatives depends on a carboxy...
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