The electrochemical polymerization of methylene green and its electrocatalysis for the oxidation of NADH
The electrochemical polymerization of methylene green and its electrocatalysis for the oxidation of NADH
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DOI：
10.1016/0003-2670(96)00117-1
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发表时间：
1996-08
影响因子：
6.2
通讯作者：
Zhou Dong-mei;Fang Hui-qun;Chen Hongyuan;J. Huang-xian;Wang Yun
中科院分区：
文献类型：
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作者：
Zhou Dong-mei;Fang Hui-qun;Chen Hongyuan;J. Huang-xian;Wang Yun
以亚甲基绿色水溶液为电解质，在玻碳电极上进行电化学聚合，在-0.4 ~+1.2 V（vs. SCE）之间进行循环伏安扫描，成功地制备了聚亚甲基绿色薄膜修饰电极。溶液的pH值对聚合过程和膜的特性有显著影响。与水溶液中吸附亚甲基绿色得到的修饰电极相比，该聚合物修饰电极具有更高的稳定性和更好的催化活性。在中性介质中峰电位正移约180 mV。该聚合物对NADH的氧化有明显的催化电流，并且使NADH的氧化过电位降低约400 mV。电催化电流与NADH浓度成正比，在0.5 ~ 10.0mM范围内线性关系良好，相关系数为0.996。
A poly(methylene green) thin film modified electrode was successfully prepared by means of electrochemical polymerization, which was carried out with cyclic voltammetric sweeps between −0.4 and +1.2 V (vs. SCE) at a glassy carbon base electrode in methylene green aqueous solution. The pH value of the solution notably affected the process of polymerization and the characteristics of the film. Compared with modified electrodes obtained by adsorption of methylene green in aqueous solution, this polymer modified electrode exhibited a higher stability and better catalytic activity for NADH. The peak potential shifted towards a positive direction for about 180mV in neutral medium. An obvious catalytic current could be observed for the oxidation of NADH, moreover, the polymer could reduce the oxidation overpotential of NADH by about 400 mV. The electrocatalytic current was proportional to the concentration of NADH, and a good linear relation from 0.5 to 10.0 mM with a correlation coefficient of 0.996 was obtained.