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首页> 外文OA文献 >Graphite Electrode Modified with a New Phenothiazine Derivative and with Carbon Nanotubes for NADH Electrocatalytic Oxidation
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Graphite Electrode Modified with a New Phenothiazine Derivative and with Carbon Nanotubes for NADH Electrocatalytic Oxidation

机译：新型吩噻嗪衍生物和碳纳米管修饰的石墨电极用于NADH电催化氧化

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摘要

The electrochemical behavior of a modified electrode obtained by immobilization of single-walled carbon nanotubes onto a graphite electrode modified with a new phenothiazine derivative, bis-phenothiazin-3-yl methane (BPhM), G/BPhM-CNT, has beenevaluated and compared with BPhM adsorbed on graphite electrode (G/BPhM). The G/BPhM-CNT electrode presents improved performances for NADH electrocatalytic oxidation in comparison with G/BPhM electrode, expressed by: (i) a significant increase ofelectrocatalytic rate constant (kobs,[NADH] 0) for NADH oxidation (856.32 L mol–1 s–1 for G/BPhM-CNT and 51.63 L mol–1 s–1 for G/BPhM, in phosphate buffer, pH 7); (ii) the obtained amperometric sensors for NADH detection present increase sensitivity (S = 6.9 mA L mol–1 for G/BPhM-CNT and S = 0.55 mA L mol–1 for G/BPhM, pH 7).
机译：通过将单壁碳纳米管固定在用新吩噻嗪衍生物双-吩噻嗪-3-基甲烷（BPhM）G / BPhM-CNT改性的石墨电极上获得的改性电极的电化学行为已得到评估并与之比较BPhM吸附在石墨电极上（G / BPhM）。与G / BPhM电极相比，G / BPhM-CNT电极对NADH电催化氧化性能有所改善，表示为：（i）NADH氧化的电催化速率常数（kobs，[NADH] 0）显着增加（856.32 L mol–在磷酸盐缓冲液（pH 7）中，G / BPhM-CNT为1 s–1，G / BPhM为51.63 L mol–1 s-1。 （ii）所获得的用于NADH检测的电流传感器提高了灵敏度（对于G / BPhM-CNT，S = 6.9 mA L mol-1；对于G / BPhM，pH 7，S = 0.55 mA L mol-1）。

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