In this study we develop a general framework for describing reaction-diffusion processes in a multi-component electrolyte in which multiple reactions of different types may occur. Our motivation for this is the need to understand how the interactions between species and processes occurring in a complex electrochemical system. We use the framework to develop a modified Poisson-Nernst-Planck model which accounts for the excluded volume interaction (EVI) and incorporates both electrochemical and chemical reactions. Using this model, we investigate how the EVI influences the reactions and how the reactions influence each other in the contexts of the equilibrium state of a system and of a simple electrochemical device under load. Complex behaviour quickly emerges even in relatively simple systems, and deviations from the predictions of ideal solution theory, together with how they may influence the behaviour of more complex system, are discussed.

中文翻译：

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包含物种相互作用的复杂反应扩散系统的非电中性模型

在这项研究中，我们开发了一个通用框架来描述多组分电解质中的反应扩散过程，其中可能发生多种不同类型的反应。我们这样做的动机是需要了解物种和过程之间的相互作用如何在复杂的电化学系统中发生。我们使用该框架开发了一个改进的 Poisson-Nernst-Planck 模型，该模型考虑了排除体积相互作用 (EVI) 并结合了电化学和化学反应。使用该模型，我们研究了 EVI 如何影响反应以及反应如何在系统和负载下的简单电化学装置的平衡状态的背景下相互影响。即使在相对简单的系统中，复杂的行为也会很快出现，