Oxygen Solubility, Diffusion Coefficient, and Solution Viscosity

Abstract In this chapter, the necessary parameters for both rotating disk electrode/rotating ring-disk electrode analysis in oxygen reduction reaction study, such as O2 solubility, O2 diffusion coefficient and the viscosity of the aqueous electrolyte solutions are discussed in depth in terms of their definitions, theoretical background, and experiment measurements. The effects of type/concentration of electrolyte, temperature, and pressure on values of these parameters are also discussed. To provide the readers with useful information, the values of these parameters are collected from literature, and summarized in several tables. In addition, the values of both the O2 solubility and diffusion coefficient in Nafion® membranes or ionomers are also listed in the tables. Hopefully, this chapter would be able to serve as a data source for the later chapters of this book, and also the readers could find it useful in their experimental data analysis.