Rotating Ring-Disk Electrode Method

Abstract In this chapter, the importance of rotating ring-disk electrode (RRDE) fundamentals and practical usage in an oxygen reduction reaction (ORR) study is emphasized in terms of both the electron-transfer process on electrode surface, diffusion-convection kinetics near the electrode, and the ORR mechanism, particularly the detection of intermediate such as peroxide. One of most important parameters of RRDE, the collection efficiency, is extensively described including its concept, theoretical expression as well as experiment calibration. Its usage in evaluating the ORR kinetic parameters, the apparent electron transfer, and percentage of peroxide formation is also presented. In addition, the measurement procedure including RRDE preparation, current–potential curve recording, and the data analysis are also discussed in this chapter.