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首页> 外文期刊>International Journal of Electrochemical Science >Glassy Carbon Modified Electrode: Polymer and Supramolecular Assembly of Co(II)-[Tetra(O-Aminophenyl) Porphyrin] New Material for Electrocatalytic Assays
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Glassy Carbon Modified Electrode: Polymer and Supramolecular Assembly of Co(II)-[Tetra(O-Aminophenyl) Porphyrin] New Material for Electrocatalytic Assays

机译：玻碳修饰电极：Co（II）-[四（O-氨基苯基）卟啉]新材料的聚合物和超分子组装

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A glassy carbon electrode was electrochemically coated with a Co(II)[tetra(o-aminophenyl) porphyrin](Co(II)TAPP) polymeric layer. The poly-Co(II)TAPP modified electrode presented Z 60.26 nm andRMS 4.73 nm values. In addition, a supramolecular assembly of Co(II)TAPP physisorbed on thepolymeric film of the same porphyrin modified electrode was prepared (SMA-Co(II)TAPP/poly- Co(II)TAPP/GC). This supramolecular assembly presented Z 115.55 nm and RMS 37 nm valuesobtained by atomic force microscopy (AFM) surface characterization. The polymer film and the -staking supramolecular assemblies were characterized by atomic force microscopy, scanning electronmicroscopy (SEM) and cyclic voltammetry (CV). These modified electrodes were compared aselectrocatalysts for oxygen reduction reaction at pH 6.8, phosphate buffer. Oxygen electrocatalyticreduction at the supramolecular modified electrode started at 0.20 V vs. Ag/AgCl, shifting the potentialca. 0.15 V with respect to the polymer modified electrode. On the other hand, under the sameexperimental conditions the catalytic current increased ca. 30 %. Carbon dioxide electrocatalyticreduction assays afforded similar results at both modified electrodes. Nevertheless, within the studiedpotential range for the reaction, hydrogen evolution takes place decreasing thus the carbon dioxideelectrocatalytic reduction.
机译：用Co（II）[四（邻氨基苯基）卟啉]（Co（II）TAPP）聚合物层电化学涂覆玻璃碳电极。聚Co（II）TAPP修饰电极的Z值为60.26 nm，RMS值为4.73 nm。此外，制备了物理吸附在同一卟啉修饰电极的聚合物膜上的Co（II）TAPP的超分子组装体（SMA-Co（II）TAPP / poly-Co（II）TAPP / GC）。该超分子组装体表现出通过原子力显微镜（AFM）表面表征获得的Z 115.55 nm和RMS 37 nm值。通过原子力显微镜，扫描电子显微镜（SEM）和循环伏安法（CV）表征聚合物膜和铆接的超分子组件。将这些改性电极作为磷酸盐缓冲液在pH 6.8下进行氧还原反应的电催化剂进行了比较。超分子修饰电极上的氧气电催化还原从相对于Ag / AgCl的0.20 V开始，转移了电势ca。相对于聚合物改性电极为0.15V。另一方面，在相同的实验条件下，催化电流约增加。 30％。二氧化碳电催化还原试验在两个修饰电极上均提供了相似的结果。然而，在所研究的反应潜力范围内，发生了放氢，从而减少了二氧化碳的电催化还原。

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