Journal
APPLIED SURFACE SCIENCE
Volume 480, Issue -, Pages 96-104Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2019.02.192
Keywords
Europium oxide; Pt nanoclusters; A newly active photocatalyst; Photocatalytic hydrogen evolution; Visible light
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Funding
- National Natural Science Foundation of China [21271022]
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In the present work, europium oxide was successfully developed as a newly active photocatalyst and used for H-2 evolution with Eosin Y (EY)-sensitized photocatalytic water splitting under visible light irradiation. A series of Pt nanoclusters (NCs) deposited on europium oxide photocatalysts was fabricated by an in-situ chemical deposition method. Electrochemical analysis showed that the conduction band potential of Eu2O3 was -0.82 V (vs NHE), which was more negative than the reduction potential of H2O/H-2. High-resolution transmission electron microscopy revealed that the Pt NCs had excellent dispersion and ultrasmall size (similar to 1.81 nm). The optimal photocatalytic H-2 evolution activity could be obtained by EY-sensitized 5 wt% Pt/Eu under visible light and reached 807.4 mu mol in 2 h. In addition, a reasonable mechanism for the enhancing photocatalytic H-2 evolution activity has been investigated and presented. This research indicates that lanthanide oxides with dye sensitization could be very promising photocatalysts for the reduction of water to H-2.
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