Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep19846
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Funding
- Research Program of China (973 Program) [2013CB834804, 2013CB632403]
- Natural Science Foundation of China [21273257, 21477136, 21471155]
- Beijing Natural Science Foundation [2132057]
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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 mu mol h(1) g(1) for the first 5 h (106000 mu mol 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 photodeposited 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.
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