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采用水热合成法制备出片状结构钼酸锌,并以其为原料,添加石墨(G)或导电碳(Cc),利用喷涂法分别制备出ZnMoO4、ZnMoO4-G和ZnMoO4-Cc对电极催化材料,应用于染料敏化太阳能电池(DSCs)中。实验结果表明:以ZnMoO4为对电极材料的DSC光电转换效率为4.19%,在分别添加石墨及导电碳制备成复合对电极材料后,其相应的光电转换效率分别提高到6.56%及7.36%。其中,ZnMoO4-Cc对电极与相同条件下铂对电极的光电转换效率(7.81%)相当。电化学阻抗(EIS),循环伏安法(CV)及Tafel极化曲线测试结果表明,ZnMoO4、ZnMoO4-G和ZnMoO4-Cc三种材料均具有一定的导电性和电催化性能。
The sheet-like zinc molybdate was prepared by hydrothermal synthesis method, and graphite (G) or conductive carbon (Cc) was added as raw materials to prepare ZnMoO4, ZnMoO4-G and ZnMoO4-Cc Materials, used in dye-sensitized solar cells (DSCs). The experimental results show that the photoelectric conversion efficiency of DSC using ZnMoO4 as the counter electrode material is 4.19%, and the corresponding photoelectric conversion efficiency is increased to 6.56% and 7.36% respectively after the graphite and the conductive carbon are separately prepared into the composite counter electrode material. Among them, the ZnMoO4-Cc counter electrode with the same conditions, the photoelectric conversion efficiency of platinum (7.81%). The results of electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and Tafel polarization curves show that the three materials ZnMoO4, ZnMoO4-G and ZnMoO4-Cc have certain electroconductivity and electrocatalytic activity.