通过层层自组装方法在氧化铟锡（ITO）电极上原位制备了Dawson型磷钨铁杂多酸/聚酰胺-胺复合膜。用XPS、UV-Vis、CV、AFM分析表征复合膜的形成过程和电化学性能。结果表明：杂多酸阴离子和聚酰胺-胺层层自组装形成多层复合膜且增长均匀;复合膜在酸性溶液中出现了三对氧化还原峰;用该复合膜修饰的电极稳定性好,对亚硝酸盐和溴酸盐均具有良好的电催化活性。
The multilayer films constructed from Dawson-type iron（Ⅲ）-monosubstituted tungstophosphate and a generation-4 poly（amidoamine） dendrimer（PAMAM） were prepared on the ITO electrode by the layer-by-layer self-assembly method and characterized by XPS,UV-Vis,CV and AFM.It was shown that P2W17Fe and PAMAM were gradually and uniformly incorporated into the films.Three couples of redox waves were observed in the cyclic voltammetry of the title multilayer films at acidic condition.The title multilayer films are stable and exhibit good electrocatalytic activity on the reduction of NO-2and BrO-3.
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