Bipolar membranes (BPMs) have proven useful in numerous electrochemical energy conversion and storage applications, including fuel cells and electrolyzers. However, water dissociation in bipolar membrane electrolysis cells (BPMECs) is a complicated phenomenon that occurs via several different pathways. In this work, we develop a model based on the Poisson-Nernst-Planck system that includes a multistep water-dissociation mechanism to observe the fundamental processes that contribute to BPMEC performance. The model, which is validated to in-house experimental data, demonstrates that the junction potential is the most significant contributor to the total electrolysis voltage. We investigated the effects of water-dissociation catalysts and found that the optimal catalyst ##IMG## [http://ej.iop.org/images/1945-7111/167/11/114502/jesab9ccbieqn1.gif] {$p{K}_{a}$} depends on how the catalyst is integrated into the BPM (although values near 7 are typically best, in ...

中文翻译：

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双极膜中水电解的建模

事实证明，双极性膜（BPM）可用于许多电化学能量转换和存储应用，包括燃料电池和电解槽。但是，双极膜电解池（BPMEC）中的水离解是一种复杂的现象，它通过几种不同的途径发生。在这项工作中，我们开发了一个基于Poisson-Nernst-Planck系统的模型，该模型包括一个多步水离解机制，可观察有助于BPMEC性能的基本过程。经过内部实验数据验证的模型表明，结电势是总电解电压的最重要因素。我们研究了水离解催化剂的作用，发现了最佳催化剂## IMG ## [http://ej.iop.org/images/1945-7111/167/11/114502/jesab9ccbieqn1。