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In Situ Irradiated X-Ray Photoelectron Spectroscopy on Ag-WS2 Heterostructure For Hydrogen Production Enhancement


The hot electron transition of noble materials to catalysis accelerated by localized surface plasmon resonances (LSPRs) was detected by in situ irradiated X-ray photoelectron spectroscopy (ISI-XPS) in this article. This paper synthesized an Ag Nanowire (AgNW) @ WScore-shell structure, with an ultra-thin shell of WS2(3 ∼ 7 nm), and characterized its photocatalytic properties. The AgNW@WScore-shell structure exhibited different surface-enhanced Raman spectroscopy (SERS) effects by changing shell thickness, indicating that the effect of AgNW could be controlled by WSshell. Furthermore, the hydrogen production of AgNW@WScould reach to 356% of that of pure WS2. The hot electrons arising from the LSPRs effect broke through the Schottky barrier between WS2 and AgNW and transferred to the WS2 shell, whose photocatalytic effect was thus enhanced. In addition, when the LSPRs effect was intensified by reducing the shell thickness, the hot electron transition of noble materials to catalysis was accelerated.

Funding source: National Natural Science Foundation of China (52072306, 51772246); the National Science and Technology Major Project (2017-V-0007-0077); the National Defense Basic Scientific Research Program of China (JCKYS2019607001); the National Key Laboratory of Science and Technology on Advanced Composites in Special Environments (6142905192509); the National Key Research and Development Program of China (2017YFB1103500 and 2017YFB1103501); Fundamental Research Funds for the Central Universities (3102019PJ008 and 3102018jcc002); National Program for Support of Top-notch Young Professionals (W02070161).
Related subjects: Production & Supply Chain

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