Rotating Electrode Methods and Oxygen Reduction Electrocatalysts

Wei Xing, Geping Yin, Jiujun Zhang, wei Xing

• Publisher: Elsevier
• Year: 2014
• Print ISBN: 9780444632784
• eBook ISBN: 9780444633286
• Topic: Technology & Engineering
• Subtopic: Chemical & Biochemical Engineering
• Index: Technology & Engineering

Rotating Electrode Methods and Oxygen Reduction Electrocatalysts provides the latest information and methodologies of rotating disk electrode and rotating ring-disk electrode (RDE/RRDE) and oxygen reduction reaction (ORR). It is an ideal reference for undergraduate and graduate students, scientists, and engineers who work in the areas of energy, electrochemistry science and technology, fuel cells, and other electrochemical systems.- Presents a comprehensive description, from fundamentals to applications, of catalyzed oxygen reduction reaction and its mechanisms- Portrays a complete description of the RDE (Rotating Disc Electrode)/RRDE (Rotating Ring-Disc Electrode) techniques and their use in evaluating ORR (Oxygen Reduction Reaction) catalysts- Provides working examples along with figures, tables, photos and a comprehensive list of references to help understanding of the principles involved

1

Oxygen Solubility, Diffusion Coefficient, and Solution Viscosity

Wei Xing^a, Min Yin^b, Qing Lv^b, Yang Hu^b, Changpeng Liu^b, and Jiujun Zhang^{c a}State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun, PR China ^bLaboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Changchun, PR China ^cEnergy, Mining and Environment, National Research Council of Canada, Vancouver, BC, Canada

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.

Keywords

Aqueous solution kinematic viscosity; Diffusion coefficient; Electrolyte type/concentration; Nafion film ionomer; Oxygen reduction reaction (ORR); Oxygen solubility; Pressure and pH; Rotating disk electrode (RDE); Rotating ring-disk electrode (RRDE); Temperature

Chapter Outline

1.1. Introduction 2

1.2. Physical and Chemical Properties of Oxygen 3

1.2.1. Physical Properties 3

1.2.2. Chemical Properties 5

1.3. Oxygen Solubility in Aqueous Solutions 5

1.3.1. Solubility in Pure Water 6

1.3.2. Electrolyte, Electrolyte Concentration, and pH E...

Table of contents

• Cover image
• Title page
• Table of Contents
• Copyright
• Preface
• Biography
• List of Contributors
• 1. Oxygen Solubility, Diffusion Coefficient, and Solution Viscosity
• 2. Electrode Kinetics of Electron-Transfer Reaction and Reactant Transport in Electrolyte Solution
• 3. Electrocatalysts and Catalyst Layers for Oxygen Reduction Reaction
• 4. Electrochemical Oxygen Reduction Reaction
• 5. Rotating Disk Electrode Method
• 6. Rotating Ring-Disk Electrode Method
• 7. Applications of RDE and RRDE Methods in Oxygen Reduction Reaction
• Index