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首页> 外文期刊>Russian journal of electrochemistry >Effect of gaseous products of overall electrode process on local solution conductivity and efficiency of operation of flow-through porous electrode
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Effect of gaseous products of overall electrode process on local solution conductivity and efficiency of operation of flow-through porous electrode

机译：整个电极过程中的气态产物对局部溶液电导率和流通式多孔电极运行效率的影响

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摘要

A one-dimensional porous electrode (PE) model and additional consideration of the dependence of the local solution conductivity on its gas saturation was used to study the effect of simultaneous hydrogen evolution on distribution of the potential in PE and the overall rate of the target redox reaction. It was found that this effect depends on the ratio of conductivities of the solid κs and liquid κl phases and direction of solution supply and can be both negative (rear supply at any κ_s and κ_l, front supply at κ_s ? κ_l), and positive (front supply at κ_s ≤ κ_l). However, variation of the target reaction rate in all cases for PE with a high specific surface area is low (10-40%). It is shown that in the terms of the model of a homogeneous gas-liquid mixture, a weak effect of gaseous hydrogen is related to the specific form of profiles κ_l(x) far from the earlier considered ideal (or inverse) liquid-phase conductivity profiles.
机译：使用一维多孔电极（PE）模型并另外考虑局部溶液电导率对其气体饱和度的依赖性，来研究氢气的同时析出对PE中电势分布和目标氧化还原总体速率的影响反应。已发现，这种影响取决于固体κs和液体κl相的电导率之比和溶液供应的方向，并且可以是负的（在任何κ_s和κ_l处为后供应，在κ_s？κ_l处为前供应）和正的（前端电源κ_s≤κ_1）。但是，在所有情况下，具有高比表面积的PE的目标反应速率变化都很小（10-40％）。结果表明，就均匀的气液混合物的模型而言，气态氢的弱影响与特定形式的κ_l（x）形式有关，与先前认为的理想（或逆）液相电导率相去甚远个人资料。

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