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Photosplitting water for H 2  production is a promising, sustainable approach for solar-to-chemical energy conversion. However, developing low-cost, high efficient and stable photocatalysts remains the major challenge. Here we report a composite photocatalyst consisting of FeP nanoparticles and CdS nanocrystals (FeP/CdS) for photogenerating H 2  in aqueous lactic acid solution under visible light irradiation. Experimental results demonstrate that the photocatalyst is highly active with a H 2 -evolution rate of 202000 μmol h −1  g −1  for the first 5 h (106000 μmol h −1  g −1  under natural solar irradiation), which is the best H 2  evolution activity, even 3-fold higher than the control  in situ  photo-deposited Pt/CdS system, and the corresponding to an apparent quantum efficiency of over 35% at 520 nm. More important, we found that the system exhibited excellent stability and remained effective after more than 100 h in optimal conditions under visible light irradiation. A wide-ranging analysis verified that FeP effectively separates the photoexcited charge from CdS and showed that the dual active sites in FeP enhance the activity of FeP/CdS photocatalysts.

Robustly photogenerating H2 in water using FeP/CdS catalyst under solar irradiation