The pH-dependence of oxygen reduction on quinone-modified glassy carbon electrodes
The pH-dependence of oxygen reduction on quinone-modified glassy carbon electrodes
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DOI：
10.1016/j.electacta.2007.03.053
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发表时间：
2007-12
影响因子：
6.6
通讯作者：
Gea Jürmann;D. Schiffrin;K. Tammeveski
中科院分区：
文献类型：
--
作者：
Gea Jürmann;D. Schiffrin;K. Tammeveski
采用旋转圆盘电极（RDE）技术，研究了醌修饰玻璃碳（GC）电极上氧的电化学还原与溶液pH的关系。通过电化学还原蒽醌（AQ）和菲醌（PQ）的重氮衍生物，在GC表面接枝蒽醌（AQ）和菲醌（PQ），并在不同pH值（pH 7 ~ 14）下进行氧还原测定。用循环伏安法（CV）测定了表面结合醌的氧化还原电位。考虑醌修饰电极的表面氧化还原循环模型，确定了GC/AQ和GC/PQ电极上氧还原的动力学参数。
The electrochemical reduction of oxygen has been studied on quinone-modified glassy carbon (GC) electrodes as a function of solution pH using the rotating disk electrode (RDE) technique. The surface of GC was grafted with anthraquinone (AQ) and phenanthrenequinone (PQ) by electrochemical reduction of their diazonium derivatives and the oxygen reduction measurements were carried out at different pHs (pH 7–14). The redox-potentials of surface-bound quinones were determined using cyclic voltammetry (CV). The kinetic parameters of oxygen reduction on GC/AQ and GC/PQ electrodes were determined considering a surface redox catalytic cycle model for quinone-modified electrodes.