Multiscale Modeling of Electrochemical Reactions and Processes is a practical guide to multiscale computational methodologies. It offers a holistic understanding of the impact of reaction conditions on the overall performance of electrolyzers, fuel cells, and energy storage devices. This book covers reaction conditions such as electrolyte and applied bias potential and support type, as well as how these factors determine the overall performance of devices. These topics, for the first time, are covered in one book.