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通过电化学生长法在 4 氨基硫酚自组装膜修饰金电极上制备了包含杂多酸 (SiMo11VO5-4 0 和聚合物阳离子PDDA的多层膜修饰电极。用循环伏安法研究了该多层膜的电化学行为 ,结果表明Mo的第 3个还原峰随多层膜层数的增加显著增长 ,而另两个还原峰增长缓慢。该修饰电极的峰电位随pH的增加而线性负移 ,表明有氢离子参与杂多酸的氧化还原反应。该修饰电极对BrO-3 和HNO2 的还原反应有良好的催化作用 ,催化电流随着层数的增加而增长 ,并且Mo的第三个还原峰电流与CBrO-3 有良好的线性关系。
A multi-layer film modified electrode containing heteropoly acid (SiMo11VO5-4o and PDDA) was prepared by electrochemical growth on 4-aminothiophenol self-assembled monolayer modified gold electrode. The cyclic voltammetry The results showed that the third reduction peak of Mo significantly increased with the increase of the number of multilayer films and the slow increase of the other two reduction peaks.The peak potential of the modified electrode decreased linearly with the increase of pH, Indicating that hydrogen ions are involved in the redox reaction of heteropolyacids.The modified electrode has a good catalytic effect on the reduction reaction of BrO-3 and HNO2, the catalytic current increases with the increase of the number of layers, and the third reduction peak of Mo The current has a good linear relationship with CBrO-3.