研究目的
To investigate the application of Co-Mo bimetal/carbon composite as a counter electrode in dye-sensitized solar cells (DSSCs) and its synergy mechanism.
研究成果
The Co-Mo bimetal/carbon composite with a Co2+/Mo2+ molar ratio of 1:3 showed photoelectric conversion efficiency close to that of Pt-based DSSCs. The synergy between carbon and metal ions contributes to the composite's good electrical conductivity and catalytic activity, making it a promising alternative to Pt in DSSCs.
研究不足
The study focuses on the application of Co-Mo bimetal/carbon composites in DSSCs and their synergy mechanism. Limitations may include the scalability of the synthesis process and the long-term stability of the composites under operational conditions.
1：Experimental Design and Method Selection:
The study involved the synthesis of Co-Mo bimetal/carbon composites through a controlled carbonization process using sodium alginate. The composites were then used as counter electrodes in ZnO-based DSSCs.
2：Sample Selection and Data Sources:
ZnO photoanodes were prepared using a solid-state synthesis method. Co-Mo/carbon composite CEs were prepared with varying Co2+/Mo2+ molar ratios.
3：List of Experimental Equipment and Materials:
Equipment included X-ray diffraction (XRD), Raman spectrometer, field-emission gun-scanning electron microscopy (FEG-SEM), transmission electron microscopy (TEM), and an electrochemical workstation. Materials included sodium alginate, Co(NO3)2, (NH4)2MoO4, and N719 dye.
4：Experimental Procedures and Operational Workflow:
The ZnO photoanode was prepared by grinding Zn(NO3)2·6H2O and NaOH, followed by annealing. The Co-Mo/carbon composite was synthesized by carbonizing a mixture of sodium alginate and metal salts. DSSCs were assembled using these components.
5：Data Analysis Methods:
The performance of DSSCs was evaluated using current-voltage (J-V) curves, electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and Tafel polarization measurements.
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