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首页> 外文期刊>Electroanalysis >Preparation, Electrochemistry, and Electrocatalytic Activity of Lead Pentacyanonitrosylferrate Film Immobilized on Carbon Ceramic Electrode
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Preparation, Electrochemistry, and Electrocatalytic Activity of Lead Pentacyanonitrosylferrate Film Immobilized on Carbon Ceramic Electrode

机译：固定在碳陶瓷电极上的五氰基亚硝酰基高铁酸铅薄膜的制备，电化学和电催化活性

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摘要

Lead pentacyanonitrosylferrate (PbPCNF), a new Prussian blue analog, was immobilized on the surface of a carbon ceramic electrode (CCE) prepared by sol-gel method. The immobilization process consists of adding a certain amount of metallic lead to the electrode matrix before gelation, and chemical derivatization of Pb on the electrode surface to a PbPCNF solid film by immersing the electrode in a solution of sodium pentacyanonitrosylferrate (PCNF). The composition of the synthesized PbPCNF was characterized by FTIR, scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) techniques. The resulting modified electrode showed electroactivity at two redox centers. The electrochemical behavior of the PbPCNF modified carbon ceramic electrode (PbPCNF vertical bar CCE) was studied by cyclic voltammetry. Under optimized conditions the peak-to-peak separation is only 39 mV, indicative of a surface reaction. Ion effects of the supporting electrolyte suggest that cations have a considerable effect on the electrochemical behavior of the modified electrode. ne transfer coefficient (alpha) and the charge transfer rate constant at the modifying film vertical bar electrode interface (k(s)) were calculated. The electrocatalytic activity of the modified electrode toward the electro-reduction of peroxodisulfate was studied in details.
机译：一种新的普鲁士蓝类似物五氰基亚硝酰基高铁酸铅（PbPCNF）被固定在通过溶胶-凝胶法制备的碳陶瓷电极（CCE）的表面上。固定过程包括在凝胶化之前向电极基质中添加一定量的金属铅，以及通过将电极浸入五氰基亚硝酰基高铁酸钠（PCNF）溶液中，将电极表面上的Pb化学衍生为PbPCNF固体膜。合成的PbPCNF的组成通过FTIR，扫描电子显微镜（SEM）和能量色散X射线（EDX）技术进行了表征。所得的修饰电极在两个氧化还原中心显示出电活性。通过循环伏安法研究了PbPCNF修饰碳陶瓷电极（PbPCNF垂直棒CCE）的电化学行为。在优化条件下，峰峰分离仅为39 mV，表明存在表面反应。支持电解质的离子效应表明，阳离子对修饰电极的电化学行为具有重要影响。计算出在改性膜垂直棒电极界面处的转移系数α和电荷转移速率常数（k（s））。详细研究了改性电极对过二硫酸盐电还原的电催化活性。

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