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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Perchlorate interchange during the redox process of PPy/PVS films in an acetonitrile medium. A voltammetric and EDX study
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Perchlorate interchange during the redox process of PPy/PVS films in an acetonitrile medium. A voltammetric and EDX study

机译：PPy / PVS膜在乙腈介质中的氧化还原过程中的高氯酸盐交换。伏安和EDX研究

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摘要

Polypyrrole/poly(vinyl sulfonate) (PPy/PVS) films in acetonitrile containing 0.1 M LiClO4 were studied by cyclic voltammetry. Consecutive voltammograms pointed to a continuous increase in the charge. involved in the process. suggesting a rise in the number of the electroactive participants involved in the redox process. However, voltammograms obtained for the PPy/ClO4 films in analogous conditions pointed to a steady-state behavior from the very early cycles. Theoretical studies based on the Nernst and Butler-Volmer equations indicated that perchlorate ions are involved during the oxidation/reduction process of the PPy/PVS films when the steady state is reached. This result was confirmed by "ex situ" energy-dispersive X-ray analysis of the films. In this regard. the electrochemical behavior of PPy/PVS polymers was similar to that of PPy/ClO4 films when a high number of cycles were carried out. The exchange of ClO4- during the redox reaction of the PPy/PVS films made it necessary to incorporate Li-divided by cations inside the polymer during the initial voltammetric cycles to compensate for the negative charges of PVS polyanions. Li-divided by canons are mainly stabilized inside the polymer by the ion pairs formed with the sulfonated groups of the PVS. An increase and shift of the voltammetric cycles indicated a restructuring of the polymeric chains with consecutive scan.
机译：通过循环伏安法研究了含0.1 M LiClO4的乙腈中的聚吡咯/聚（乙烯基磺酸酯）（PPy / PVS）膜。连续伏安图表明电荷不断增加。参与该过程。这表明参与氧化还原过程的电活性参与者的数量增加。但是，在类似条件下获得的PPy / ClO4膜的伏安图表明，从很早的循环开始就具有稳态行为。基于Nernst和Butler-Volmer方程的理论研究表明，当达到稳态时，PPy / PVS膜的氧化/还原过程中会涉及高氯酸根离子。通过膜的“非原位”能量色散X射线分析证实了该结果。在这方面。当进行大量循环时，PPy / PVS聚合物的电化学行为类似于PPy / ClO4膜。在PPy / PVS膜的氧化还原反应过程中ClO4-的交换使得在初始伏安循环中必须将被阳离子划分的Li引入聚合物内部，以补偿PVS聚阴离子的负电荷。被佳能划分的Li主要通过与PVS的磺化基团形成的离子对稳定在聚合物内部。伏安循环的增加和移动表明聚合物链在连续扫描下发生了重组。

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