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首页> 外文期刊>Journal of Sciences >RATE CONSTANTS FOR THE ELECTRODE REACTIONS OF QUINONES IN CHLOROFORM: THE DEPENDENCE ON ELECTRODE MATERIALS AND APPARENT STANDARD POTENTIALS
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RATE CONSTANTS FOR THE ELECTRODE REACTIONS OF QUINONES IN CHLOROFORM: THE DEPENDENCE ON ELECTRODE MATERIALS AND APPARENT STANDARD POTENTIALS

机译：在氯仿中奎宁酮的电极反应速率常数：电极材料和表观标准电位的依赖性

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摘要

The reduction process for some quinones has been studied by cyclic voltammetry, rotating disk electrode voltammetry and chronopotentiometry in chloroform at platinum, gold and glassy carbon electrodes using tetrabutylammonium perchlorate (TBAP) as supporting electrolyte. The results obtained from this study reveal that the reduction of the quinones is two one-electron processes, the first reduction to the semiquinone anion radical is nearly reversible and the second to the dianion is quasi-reversible. The kinetic parameters for the reduction of the quinones to the semiquinone were evaluated and the dependence on the electrode materials and apparent standard potential is discussed. The diffusion coefficients of the quinones were determined from both chronopotentiometric and chronoamperometric measurements in 0.5 M chloroform solution of TBAP.
机译：以高氯酸四丁铵（TBAP）为支撑电解质，通过循环伏安法，旋转圆盘电极伏安法和计时电位法研究了氯，铂，金和玻璃碳电极上醌的还原过程。从这项研究获得的结果表明，醌的还原是两个单电子过程，第一个还原为半醌阴离子自由基几乎是可逆的，第二个还原为二价阴离子是可逆的。评价了将醌还原为半醌的动力学参数，并讨论了对电极材料和表观标准电位的依赖性。醌的扩散系数由0.5M TBAP氯仿溶液中的计时电位法和计时安培法测定。

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