FeOOH decorated Sb 2 Se 3 @Cd x Zn 1-x S core-shell nanorod heterostructure photocathode for enhancing photoelectrochemical performance
Materials Today Communications, ISSN: 2352-4928, Vol: 35, Page: 106018
2023
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Article Description
In this work, a core-shell heterostructure Sb 2 Se 3 @Cd x Zn 1-x S photocathode was constructed on the Fluorine-doped Tin Oxide (FTO) by Vapor Transport Deposition (VTD) and hydrothermal method, then β-FeOOH was deposited on the surface of Sb 2 Se 3 @Cd 0.8 Zn 0.2 S. The investigation indicates that Sb 2 Se 3 @Cd x Zn 1-x S has a one-dimensional (1D) nanorod structure, which can provide a fast carrier transmission channel. The introduction of a Cd x Zn 1-x S shell can accelerate the charge separation of Sb 2 Se 3 and type-II heterojunction between them can enhance the electron migration efficiency of Sb 2 Se 3. Using β-FeOOH as the protective layer can not only protect the ternary photocathode from photocorrosion, but also act as a cocatalyst to enhance surface reaction kinetics. Photoelectrochemical (PEC) tests found that the composite photocathode Sb 2 Se 3 @Cd 0.8 Zn 0.2 S/β-FeOOH achieves a higher photocurrent density (0.252 mA/cm 2 ), which is about 21 times higher than that of pure Sb 2 Se 3 nanorod photocathode (0.012 mA/cm 2 ) under the same condition, besides, it also exhibited more excellent stability during 1 h hydrogen production. This work provides an effective way to design and fabrication of nanostructures for high-efficiency water splitting photoelectrodes.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S2352492823007092; http://dx.doi.org/10.1016/j.mtcomm.2023.106018; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85153214217&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S2352492823007092; https://dx.doi.org/10.1016/j.mtcomm.2023.106018
Elsevier BV
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