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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Reduction of Mn (II) Mediated by C60/Li+ Modified Glassy Carbon Electrode
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Electrochemical Reduction of Mn (II) Mediated by C60/Li+ Modified Glassy Carbon Electrode

机译：C 60 / Li + 修饰的玻碳电极介导的Mn（II）的电化学还原

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Glassy carbon electrode (GCE) was modified with C60 (C60/GCE) by a solution evaporation+ technique, C60/Li /GCE was prepared by modifying C60/GCE in Li+ solution via cv potentialcycling.Two reduction peaks of Mn(II), which appear at +600 and -100 mV vs Ag/AgCl at GCelectrode increased considerably with slight peak shifting when the two modified GCE electrodes wereused. The sensing characteristics of the modified film electrodes, demonstrated in this studycomprised of: (i) a wide working potential window ranging from +1.8 to -1.8V (depending on differentscan rate, pH, concentration and temperature ); (ii) a wide applicable pH range (at least from 2 to 11);(iii) a wide applicable temperature range 30-90oC; (iv) a satisfactory linear voltammetric andamperometric response to various analytes; (v) good reproducibility; (vi) Other heavy metal ions suchas Hg2+, Cd2+ and Cu2+ appear to exert positive interference on the reduction peaks of Mn2+ and (vii)+ stable and fast current response . The reduction current response of Mn(II) at C60/Li /GCE is alsosignificantly dependent on pH, temperature, concentration and scan rate. Based on the surface charge+ determined by chronocoulometry (CC), C60/Li /GCE appears more conductive in acidic solution than-6 2 in alkaline. Based on Cottrell equation, diffusion coefficient of 5.12x 10 cm /sec for the reduction of2+ Mn was determined.
机译：通过溶液蒸发+技术将C60（C60 / GCE）修饰为玻碳电极（GCE），通过cv电势循环修饰Li +溶液中的C60 / GCE制备C60 / Li /GCE.Mn(II）有两个还原峰当使用两个修饰的GCE电极时，在+600和-100 mV时，GC电极上的Ag / AgCl相对于Ag / AgCl显着增加，并出现轻微的峰移动。这项研究表明，改性薄膜电极的传感特性包括：（i）宽的工作电势范围为+1.8至-1.8V（取决于不同的扫描速率，pH，浓度和温度）; （ii）适用的pH范围宽（至少2至11）;（iii）适用的温度范围30-90oC; （iv）对各种分析物的线性伏安和安培响应令人满意; （v）重现性好; （vi）其他重金属离子，例如Hg2 +，Cd2 +和Cu2 +，似乎对Mn2 +和（vii）+的稳定和快速电流响应的还原峰产生正干扰。 Mn（II）在C60 / Li / GCE下的还原电流响应也明显取决于pH，温度，浓度和扫描速率。根据通过计时库仑法（CC）测定的表面电荷+，C60 / Li / GCE在酸性溶液中的导电性比碱性溶液中的6 2高。基于Cottrell方程，确定用于减少2 + Mn的扩散系数为5.12×10cm / sec。

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