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首页> 外文会议>Sensors, actuators, and microsystems general session;Meeting of The Electrochemical Society >Voltammetric Behavior of Carbon Paste Electrodes with Native and Chemical Modified Porphyrans
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Voltammetric Behavior of Carbon Paste Electrodes with Native and Chemical Modified Porphyrans

机译：天然和化学修饰的卟啉碳糊电极的伏安行为

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Porphyran is a sulfated polysaccharide obtained from Porphyra genus. Carbon paste electrodes (CPEs) containing natural ionic polysaccharides have been studied. This study describes the voltammetric behavior of porphyran modified CPE obtained before and after chemical desulfation of the polysaccharides by alkaline treatment (PA) and solvolysis (PD) from the native fraction (PN). The cyclic voltammograms for all porphyran modified electrodes indicated a redox current peaks increase in the same potential range when compared to the unmodified CPEs. The CPEs were modified with different amounts of porphyran and those which showed the most intense anodic peaks were: 10 (EN), 20 (EA) and 40 μg (ED). In addition, the anodic peak current increased linearly with the square root of the scan rate, indicating that the redox process was diffusion-controlled. In conclusion, the electrochemical experiments demonstrated that electron transfer on the porphyran-modified CPEs surface is more efficient, conducting higher current and offering lower resistivity.
机译：紫菜是得自紫菜属的硫酸化多糖。已经研究了包含天然离子多糖的碳糊电极（CPE）。这项研究描述了通过碱性处理（PA）和溶剂分解（PD）从天然级分（PN）对多糖进行化学脱硫之前和之后获得的卟啉修饰的CPE的伏安行为。所有卟啉修饰电极的循环伏安图表明，与未修饰的CPE相比，氧化还原电流峰在相同的电位范围内增加。用不同数量的卟啉修饰了CPE，显示出最强的阳极峰的是：10（EN），20（EA）和40μg（ED）。此外，阳极峰值电流与扫描速率的平方根成线性关系，表明氧化还原过程受扩散控制。总之，电化学实验表明，在卟啉修饰的CPE表面上电子转移效率更高，传导的电流更大，电阻率更低。

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