Journal
MATERIALS LETTERS
Volume 355, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2023.135534
Keywords
BiOI/AgI/Ag; Composite materials; Photoelectrochemical; Interfaces
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A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
BiOI-based photocathode has attracted much attention for photoelectrochemical (PEC) water splitting applica-tion. Here, we have designed a BiOI/AgI/Ag plasmonic heterostructure through a facile electrodeposition combined with ion-exchange and illumination approach. The work function difference between BiOI and AgI brings favorable interfacial band bending, and the Ag nanoparticle exhibits localized surface plasmonic effect to boost the carrier transfer. Thus, the BiOI/AgI/Ag photocathode achieves superior current density of-1.02 mA cm-2 at 0 V vs. RHE for 200 min, which is 50 times than that of pristine BiOI. These results pave a way for promising PEC water splitting using BiOI-based heterostructure photocathodes.
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