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首页> 外文期刊>Electroanalysis >Electrocatalytic reduction of dioxygen at carbon electrodes modified with Co(II)-Schiff base complexes in various pH solutions
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Electrocatalytic reduction of dioxygen at carbon electrodes modified with Co(II)-Schiff base complexes in various pH solutions

机译：Co（II）-Schiff碱配合物在各种pH溶液中修饰的碳电极上双氧的电催化还原

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摘要

The electrocatalytic reduction of dioxygen has been studied by cyclic voltammetry and chronoamperometry at a glassy carbon electrode and a carbon microelectrode modified with Schiff base Co(II) complex in a dioxygen saturated 1 M KOH aqueous solution of various pH and temperature. The electrochemical reduction of dioxygen at the modified electrode establishes a pathway of two-electron reduction to form hydrogen peroxide. The reduction potential (E-p) of dioxygen shows pH dependence. The electrochemical reduction of dioxygen is irreversible and diffusion controlled. The activation energy obtained from Arrhenius plots for the reduction of dioxygen was 3.64 kcal/mol at the bare glassy carbon electrode? whereas it was 2.51 Kcal/mol at the modified glassy carbon electrode. [References: 24]
机译：通过循环伏安法和计时电流法，在各种pH和温度的双氧饱和1 M KOH水溶液中，在玻璃碳电极和Schiff碱Co（II）配合物修饰的碳微电极上，通过循环伏安法和计时电流法研究了双氧的电催化还原。修饰电极上双氧的电化学还原建立了两电子还原形成过氧化氢的途径。双氧的还原电位（E-p）显示pH依赖性。双氧的电化学还原是不可逆的且受扩散控制。在裸露的玻璃碳电极上，从Arrhenius图获得的用于还原双氧的活化能为3.64 kcal / mol。而在改性玻璃碳电极上为2.51 Kcal / mol。 [参考：24]

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