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Ideal Conductivity Profile of a Porous Matrix for a Flow-through Porous Electrode with a High Conversion Degree of the Electroactive Component

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Abstract

The possibility of designing an equally accessible, in electric respect (η ≈ const), porous electrode (PE) is considered. The design involves creating a special conductivity profile of the solid phase, κs(x), in conditions of considerable variations of current density inside the electrode. A generalized expression for an ideal profile κs(x) at any current distribution is derived, and some concrete solutions for different PE operation modes at the limiting current of the target reaction are obtained. The profiles are exponential over a major fraction of PE and change to hyperbolic at a low conversion degree of the electroactive component. Similarities and differences of the profiles are analyzed. At a high conversion degree, only the exponential profile ensures effective operation of the entire surface of PE and selectivity of the target reaction.

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Authors and Affiliations

  1. Institute of Solid-State Chemistry and Mechanical Chemistry, Siberian Division, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128, Russia

    A. I. Maslii & N. P. Poddubnyi

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  1. A. I. Maslii
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  2. N. P. Poddubnyi
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Maslii, A.I., Poddubnyi, N.P. Ideal Conductivity Profile of a Porous Matrix for a Flow-through Porous Electrode with a High Conversion Degree of the Electroactive Component. Russian Journal of Electrochemistry 37, 735–740 (2001). https://doi.org/10.1023/A:1016776903699

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