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

Scientific Reports
Huanqing ChengWen-Fu Fu

Abstract

Photosplitting water for H2 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 H2 in aqueous lactic acid solution under visible light irradiation. Experimental results demonstrate that the photocatalyst is highly active with a H2-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 H2 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.

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Citations

Jan 20, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Jiuqing WenGuican Bi
Aug 31, 2018·Frontiers in Chemistry·Pavel MorozMikhail Zamkov
Aug 25, 2017·ACS Applied Materials & Interfaces·Zhichao SunTetsuro Majima
Sep 16, 2020·ACS Applied Materials & Interfaces·Yi ZhaoYuanhui Zheng

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Methods Mentioned

BETA
x-ray photoelectron spectroscopy
X-ray

Software Mentioned

Cambridge Serial Total Energy Package ( CASTEP )

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