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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Behavior and Characterization of Grafted Polystyrene-Acrylonitrile Electrodes
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Electrochemical Behavior and Characterization of Grafted Polystyrene-Acrylonitrile Electrodes

机译：接枝聚苯乙烯-丙烯腈电极的电化学行为与表征

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The redox of grafted polymer electrodes GPE (grafted polystyrene-acrylonitrile, GP15%, GP45% andGP50% grafting percentage) in aqueous electrolyte has been studied under various voltammetricconditions. In this work, voltammetric studies were carried out, principally in electrolyte containingpotassium chloride. It was observed that GP15% has a good potential window at -2.0 - +2.0V withoutany current peak, while GP45% has reduction and oxidation current peaks at -175.9 and +210mVrespectively. Also GP50% has oxidation and reduction current peaks at +263.1 and -261.9mVrespectively. The redox process is irreversible in aqueous electrolyte containing different alkaline+ + + + cations, such as Na , K , Rb and Cs . The shift of redox potential was found to follow the change in+ + + + the hydration energy in the order: Cs >Rb > K >Na . In addition, the redox peaks of the fabricatedelectrodes from GP were also studied in aqueous electrolytes at different anaions (KCl, KClO4,K2HPO4, KNO3 and K2SO4), which gave good redox peaks in KCl and enhanced the redox current viaincreasing the concentration. Electrochemical experiments reveal that the grafted polymer electrodesshow improved electron-transfer characteristics and exhibit high electrocatalytic activity for graftedpercentage in the order of : 15% > 45% > 50%. The applications of these electrodes, especially type15%, are in the cyclic voltammetric technique when used as a working electrode.
机译：在各种伏安条件下，对接枝聚合物电极GPE（接枝聚苯乙烯-丙烯腈，GP15％，GP45％和GP50％接枝率）的氧化还原进行了研究。在这项工作中，主要在含氯化钾的电解液中进行了伏安法研究。可以观察到，GP15％在-2.0-+ 2.0V处有一个良好的电位窗口，没有任何电流峰值，而GP45％在-175.9和+ 210mV处分别具有还原和氧化电流峰值。 GP50％的氧化和还原电流峰值分别在+263.1和-261.9mV。氧化还原过程在含有不同的碱+ + + +阳离子（例如Na，K，Rb和Cs）的水性电解质中不可逆。发现氧化还原电势的变化遵循水合能的变化，顺次为：Cs> Rb> K> Na。此外，还研究了在不同阴离子（KCl，KClO4，K2HPO4，KNO3和K2SO4）的水性电解质中，GP制备的电极的氧化还原峰，这在KCl中给出了良好的氧化还原峰，并通过增加浓度而增加了氧化还原电流。电化学实验表明，接枝的聚合物电极表现出改善的电子转移特性，并表现出较高的电催化活性，接枝率依次为：15％> 45％> 50％。当用作工作电极时，这些电极的应用（尤其是15％类型）在循环伏安技术中。

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