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首页> 外文期刊>Electroanalysis >Electrooxidation of 2-mercaptopyridine-N-oxide (pyrithione) at carbon electrodes versus mercury electrodes
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Electrooxidation of 2-mercaptopyridine-N-oxide (pyrithione) at carbon electrodes versus mercury electrodes

机译：碳电极与汞电极上的2-巯基吡啶-N-氧化物（吡啶酮）的电氧化

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The electrooxidation of the bactericide and fungicide agent 2-mercaptopyridine-N-oxide (PySH), or pyrithione, was investigated by using mercury (Hg), grassy carbon (GCE), plastic formed carbon (PFCE) and paste (CPE) electrodes. From controlled-potential electrolyses or chronoamperometric measurements, the number of electrons involved in the oxidation processes was found to be close to unity in all cases. Voltammetric measurements showed that the irreversibility of the electron transfer must be related to the roughness and ordering in the surface of the electrode material: as the amorphous character of the carbon electrode was increased, the transfer appeared faster. Other effects as the O/C ratio or the removal of impurities can also influence the reversibility of the transfer. The rate constants of the electron transfers at zero potential were obtained. In addition, the extension of the adsorptive oxidation decreased when the amorphous character of the electrode was increased, but the Gibbs free enthalpy of this process did not vary from one electrode to another nor for the Hg electrode. [References: 23]
机译：杀菌剂和杀真菌剂2-巯基吡啶-N-氧化物（PySH）或巯氧吡啶的电氧化，通过使用汞（Hg），草碳（GCE），塑性碳（PFCE）和糊状（CPE）电极进行了研究。从控制电位电解法或计时安培法测量中，发现在所有情况下，氧化过程中涉及的电子数均接近于1。伏安法测量表明，电子转移的不可逆性必须与电极材料表面的粗糙度和有序性有关：随着碳电极非晶性的增加，转移出现得更快。 O / C比或杂质去除等其他影响也可能影响转移的可逆性。获得了零电势下电子转移的速率常数。另外，当电极的非晶态特性增加时，吸附性氧化的延伸降低，但是该过程的吉布斯自由焓在一个电极之间也没有变化，对于Hg电极也没有变化。 [参考：23]

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