期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 10, 期 26, 页码 13829-13838出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta02365b
关键词
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资金
- GACR [22-02022S]
- OP VVV Project NANOTECH ITI II [CZ.02.1.01/0.0/0.0/18_069/0010045]
We propose an advanced plasmon-triggered Z-scheme for efficient overall water splitting using longer wavelength photons. The study demonstrates that plasmon triggering allows for the utilization of low-energy photons and can synergistically increase hydrogen production under certain conditions.
We propose an advanced design of a plasmon-triggered Z-scheme for efficient overall water splitting (OWS), performed without the addition of sacrificial agents and by utilizing photons with longer wavelengths (close to NIR). As a Z-scheme, we used WO3 flakes coupled with CdS quantum dots, which ensured OWS under illumination with shorter wavelengths. As a plasmonic support, a periodical Au grating, able to support surface plasmon polariton excitation under NIR illumination, was used. The efficiency of the proposed structure was tested using photo-electrochemical and solely light-induced OWS. It was demonstrated that plasmon triggering makes the utilization of low-energy photons possible in OWS. The amount of light-produced hydrogen increased synergistically under double-wavelengths (simultaneous Z-scheme triggering and plasmon excitation) or broad light spectrum illumination. Thus, our work shows an effective way to increase the efficiency of the Z-scheme for OWS with the complete utilization of sunlight energy.
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