钨多酸热解制备染料敏化太阳能电池对电极WO_(2)@C电催化剂  

WO_(2)@C Electrocatalyst Prepared by Pyrolysis of Polyoxotungstate Used as Counter Electrode of Dye-sensitized Solar Cells

作　　者：刘淑慧 栗元皓 刘珊 武克忠[1] 张会 LIU Shuhui;LI Yuanhao;LIU Shan;WU Kezhong;ZHANG Hui(College of Chemistry and Materials Science,Hebei Normal University,HebeiShijiazhuang 050024,China;Journal Editorial Department,Hebei Normal University,,HebeiShijiazhuang 050024,China)

机构地区：[1]河北师范大学化学与材料科学学院,河北石家庄050024 [2]河北师范大学学报编辑部,河北石家庄050024

出　　处：《河北师范大学学报（自然科学版）》2024年第5期484-491,共8页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(2193026);河北省自然科学基金(B2021205010)。

摘　　要：以不同摩尔比的钨多酸和吡咯单体为原料,采用一锅水热法分别合成复合前驱体.在N_(2)氛围下800℃热解前驱体,制备了5种WO_(2)@C复合材料,并分别用作染料敏化太阳能电池(DSSCs)对电极.测试结果显示,n(钨多酸)∶n(吡咯)=0.20∶1时所制备的WO_(2)@C-4复合材料作对电极,电催化性能最优,能量转换效率最高,为5.92%,高于Pt电极(5.60%).这是由于添加适量吡咯,在热解过程中可以提高WO_(2)@C催化剂颗粒分散的均匀性,增加活性位点的数量,从而提高电催化活性.Composite precursors were synthesized by one-pot hydrothermal method using polyoxotungstate and pyrrole with different molar ratios as raw materials.Then, five WO_(2)@C composites were prepared by pyrolysis of precursors at 800 ℃ in nitrogen atmosphere, and further served as counter electrodes of dye-sensitized solar cells(DSSCs).The results showed that, when the molar ratio of polyoxotungstate to pyrrole was 0.20∶1,the WO_(2)@C-4 composite as the counter electrode in DSSCs had the best electrocatalytic performance and the highest power conversion efficiency(5.92 %),which was higher than that of Pt electrode(5.60 %).The reason is ascribed to that the appropriate amount of pyrrole can improve the dispersion uniformity of WO_(2)@C particles during the pyrolysis process, and increase the number of active sites, thereby improving the electrocatalytic activity.

关 键 词：钨多酸 染料敏化太阳能电池 对电极 能量转换效率 

分 类 号：TM911.4[电气工程—电力电子与电力传动]