研究目的
Investigating the enhancement of oxygen evolution reaction (OER) performance through the design of hybrid nanostructures with a plasmonic core and catalytic shell under visible light illumination.
研究成果
The Au@Ni3S2 YSs demonstrate significantly enhanced OER performance under visible light illumination due to efficient light harvesting and energy dissipation via LSPR. The study provides insights into the design of highly effective hybrid composite catalysts for energy applications.
研究不足
The study focuses on the specific system of Au@Ni3S2 YSs and may not be directly applicable to other plasmonic-catalytic hybrid systems. The mechanism of energy transfer between the yolk and shell in YSs is complex and not fully understood.
1：Experimental Design and Method Selection:
The study involved the synthesis of Au@Ni3S2 yolk-shell nanostructures (YSs) to investigate the effect of localized surface plasmonic resonance (LSPR) on OER performance. Theoretical calculations and 3D finite element method (FEM) modeling were used to predict light absorption and energy dissipation.
2：Sample Selection and Data Sources:
Au@Ni3S2 YSs were synthesized with controlled morphology. Pure Ni3S2 and Au nanoparticles were used as controls.
3：List of Experimental Equipment and Materials:
High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electron energy loss spectroscopy (EELS), UV–vis spectroscopy, and a standard three-electrode system for electrochemical measurements.
4：Experimental Procedures and Operational Workflow:
The catalytic activities of Au, Ni3S2, and Au@Ni3S2 YSs were characterized under dark and illuminated conditions using a Xe lamp as the light source. Electrochemical measurements included polarization curves, Tafel plots, and cyclic voltammetry (CV).
5：Data Analysis Methods:
The spatial electronic field distribution was analyzed using EELS. The energy dissipation and field enhancement were simulated using 3D FEM. Electrochemical data were analyzed to determine overpotential, Tafel slope, and mass activity.
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