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首页> 外文期刊>Electroanalysis >Renewable surface sol-gel derived carbon ceramic electrode modified with [Ru(NH3)(5)Cl] (PF6)(2) complex : Application to amperometric detection of chlorate
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Renewable surface sol-gel derived carbon ceramic electrode modified with [Ru(NH3)(5)Cl] (PF6)(2) complex : Application to amperometric detection of chlorate

机译：[Ru（NH3）（5）Cl]（PF6）（2）配合物修饰的可再生表面溶胶-凝胶衍生碳陶瓷电极：在氯安培检测中的应用

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摘要

A novel modified carbon ceramic electrode (CCE) containing [Ru(NH3)(5) Cl](PF6)(2) complex was fabricated by sol-gel technique. The cyclic voltammograms of the modified electrodes show a well defined redox couple due to Ru(III)/Ru(II) system with surface confined characteristics. The stability of the modified CCE modified with ruthenium complex was checked over several days, obtaining reproducible results. Chlorate has been chosen as a model to elucidate the electrocatalytic ability of modified CCE. The modified electrode showed excellent electrocatalytic activity toward chlorate electroreduction in acidic medium. Chlorate was determined amperometrically at the surface of this modified electrode in pH 2 solution. Under the optimized conditions the calibration curve is linear in the concentration range 10 mu M - 5 mM chlorate. The detection limit and sensitivity are 1 mu M and 0.43 nA/mu M respectively. The advantages of the modified CCE is its good stability and reproducibility of surface renewal by simple polishing, excellent catalytic activity and simplicity of preparation. This sensor can be used as an amperometric detector in flow systems. or chromatographic instruments.
机译：通过溶胶-凝胶技术制备了一种新型的含[Ru（NH3）（5）Cl]（PF6）（2）配合物的改性碳陶瓷电极（CCE）。由于Ru（III）/ Ru（II）系统具有表面受限特性，修饰电极的循环伏安图显示了定义良好的氧化还原对。在数天内检查了用钌络合物改性的改性CCE的稳定性，获得了可重复的结果。氯酸盐已被选为阐明改性CCE的电催化能力的模型。修饰电极对酸性介质中的氯酸盐电还原表现出优异的电催化活性。在pH 2溶液中，在该修饰电极的表面用电流法测定氯酸盐。在最佳条件下，校准曲线在10 µM-5 mM氯酸盐浓度范围内呈线性。检测限和灵敏度分别为1μM和0.43 nA /μM。改性的CCE的优势在于其良好的稳定性和通过简单抛光进行表面更新的可重复性，出色的催化活性和制备简便性。该传感器可用作流量系统中的安培检测器。或色谱仪器。

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