研究目的
To synthesize ternary nickel iron selenide (Ni0.5Fe0.5Se2) through a facile one-pot solvothermal method and evaluate its performance as a counter electrode in dye-sensitized solar cells (DSSCs) compared to conventional Pt CE.
研究成果
Ternary Ni0.5Fe0.5Se2 was successfully synthesized and demonstrated superior electrical conductivity, electrocatalytic activity, and power conversion efficiency in DSSCs compared to conventional Pt CE. This study opens new avenues for developing cost-effective and efficient Pt-free alternative materials for DSSCs.
研究不足
The study focuses on the synthesis and application of Ni0.5Fe0.5Se2 as a counter electrode in DSSCs, with comparisons limited to Pt CE and binary selenides. The long-term stability and scalability of the synthesis method and the material's performance in DSSCs under various conditions were not extensively explored.
1：Experimental Design and Method Selection:
A facile one-pot solvothermal method was used to synthesize Ni
2：5Fe5Se2 with the assistance of glucose. Sample Selection and Data Sources:
Nickel acetate, iron(III) acetylacetonate, and selenium powder were used as precursors.
3：List of Experimental Equipment and Materials:
X-ray diffraction (XRD) apparatus, field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), nitrogen adsorption apparatus, X-ray photoelectron spectroscopy (XPS), Zahner IM6 workstation for electrochemical measurements.
4：Experimental Procedures and Operational Workflow:
Synthesis of Ni0.5Fe0.5Se2, NiSe2, and FeSe2; fabrication of counter electrodes; assembling of photoanode and DSSCs; electrochemical measurements including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization.
5：5Fe5Se2, NiSe2, and FeSe2; fabrication of counter electrodes; assembling of photoanode and DSSCs; electrochemical measurements including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization. Data Analysis Methods:
5. Data Analysis Methods: XRD for phase structure and crystallinity, SEM and TEM for morphology, XPS for surface chemistry, EIS and Tafel for electrochemical properties.
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High-resolution transmission electron microscopy
Tecnai G2 F20
FEI
Characterize the microstructure and perform elemental analysis
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X-ray photoelectron spectroscopy
ESCALAB 250Xi
Thermo Scientific
Characterize the surface chemistry and composition of the hybrid material
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X-ray diffraction apparatus
D/max-2500
JAPAN SCIENCE
Characterize the phase structure and crystallinity of the samples
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Field-emission scanning electron microscopy
Nanosem 430
Determine the morphology and microstructure of the samples
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Nitrogen adsorption apparatus
Tristar 3000
Investigate N2 adsorption-desorption isotherms
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Zahner IM6 workstation
Perform electrochemical measurements including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization
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