Tomczyk Danuta, Bukowski Wiktor, Bester Karol, Kaczmarek Michalina
Department of Inorganic and Analytical Chemistry, University of Łódź, ul. Tamka 12, 91-403 Lodz, Poland.
Faculty of Chemistry, Rzeszów University of Technology, Al. Powstańców W-wy 6, 35-959 Rzeszow, Poland.
Materials (Basel). 2021 Dec 28;15(1):191. doi: 10.3390/ma15010191.
Platinum electrodes were modified with polymers of the (±)--N,N'-bis(salicylidene)-1,2-cyclohexanediaminenickel(II) ([Ni(salcn)]) and (±)--N,N'-bis(3,3'--Bu-salicylidene)-1,2-cyclohexanediaminenickel(II) ([Ni(salcn(Bu))]) complexes to study their electrocatalytic and electroanalytical properties. [Ni(salcn)] and [Ni(salcn(Bu))]) modified electrodes catalyze the oxidation of catechol, aspartic acid and NO. In the case of [Ni(salcn)] modified electrodes, the electrocatalysis process depends on the electroactive surface coverage. The films with low electroactive surface coverage are only a barrier in the path of the reducer to the electrode surface. The films with more electroactive surface coverage ensure both electrocatalysis inside the film and oxidation of the reducer directly on the electrode surface. In the films with the most electroactive surface coverage, electrocatalysis occurs only at the polymer-solution interface. The analysis was based on cyclic voltammetry, EQCM (electrochemical quartz crystal microbalance) and rotating disc electrode method.
用（±）-N，N'-双（水杨醛）-1,2-环己二胺镍（II）（[Ni（salcn）]）和（±）-N，N'-双（3,3'-丁基水杨醛）-1,2-环己二胺镍（II）（[Ni（salcn（Bu））]）配合物的聚合物修饰铂电极，以研究它们的电催化和电分析性能。[Ni（salcn）]和[Ni（salcn（Bu））]修饰电极催化儿茶酚、天冬氨酸和NO的氧化。对于[Ni（salcn）]修饰电极，电催化过程取决于电活性表面覆盖率。电活性表面覆盖率低的膜只是还原剂到达电极表面路径上的一个屏障。电活性表面覆盖率较高的膜既能确保膜内的电催化，又能确保还原剂直接在电极表面氧化。在电活性表面覆盖率最高的膜中，电催化仅发生在聚合物-溶液界面。分析基于循环伏安法、电化学石英晶体微天平（EQCM）和旋转圆盘电极法。
