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首页> 外文期刊>Russian journal of electrochemistry >Electroreduction of Molecular Oxygen on Dispersed Copper in an Ion-Exchange Matrix
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Electroreduction of Molecular Oxygen on Dispersed Copper in an Ion-Exchange Matrix

机译:离子交换基质中分散铜上分子氧的电还原

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摘要

Electrochemical reduction of molecular oxygen was studied on a [dispersed copper]-[macroporous KU-23 15/100S sulfocation exchanger with various metal concentrations] composite electrode. It was found that a high proton concentration in the ion-exchange matrix causes a decrease in the oxygen reaction overvoltage. The nanostructured state of copper particles causes stabilization of the intermediate product, i.e., hydrogen peroxide. Using the rotating disk electrode method, it was detected that the process is limited by external diffusion of oxygen to composite grains. The oxygen reaction is mostly concentrated on the grain surface and surface layers; oxygen is reduced in the bulk due to dispersed copper oxidation.
机译:在[分散铜]-[具有不同金属浓度的大量KU-23 15 / 100S硫磺交换剂]复合电极上研究了分子氧的电化学还原。已经发现,离子交换基质中的高质子浓度引起氧反应过电压的降低。铜颗粒的纳米结构状态引起中间产物即过氧化氢的稳定。使用转盘电极法,检测到该过程受到氧向复合颗粒的外部扩散的限制。氧反应主要集中在谷物的表面和表层。由于分散的铜氧化,氧气在主体中被还原。

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