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Rotating Electrode Methods and Oxygen Reduction Electrocatalysts

2014-03-26 Technology & Engineering
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Release : 2014-03-26
Genre : Technology & Engineering
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Book Rating : 286/5 ( reviews)

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Book Synopsis Rotating Electrode Methods and Oxygen Reduction Electrocatalysts by : Wei Xing

Download or read book Rotating Electrode Methods and Oxygen Reduction Electrocatalysts written by Wei Xing. This book was released on 2014-03-26. Available in PDF, EPUB and Kindle. Book excerpt: 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

Evaluation of Oxygen Reduction Activity by the Thin-film Rotating Disk Electrode Methodology

2016
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Release : 2016
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Book Synopsis Evaluation of Oxygen Reduction Activity by the Thin-film Rotating Disk Electrode Methodology by :

Download or read book Evaluation of Oxygen Reduction Activity by the Thin-film Rotating Disk Electrode Methodology written by . This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: Here, an accurate and efficient assessment of activity is critical for the research and development of electrocatalysts for oxygen reduction reaction (ORR). Currently, the methodology combining the thin-film rotating disk electrode (TF-RDE) and potentiodynamic polarization is the most commonly used to pre-evaluate ORR activity, acquire kinetic data (i.e., kinetic current, Tafel slope, etc.), and gain understanding of the ORR mechanism. However, it is often neglected that appropriate potentiodynamic parameters have to be chosen to obtain reliable results. We first evaluate the potentiodynamic and potentiostatic polarization measurements with TF-RDE to examine the ORR activity of Pt nanoelectrocatalyst. Furthermore, our results demonstrate that besides depending on the nature of electrocatalyst, the apparent ORR kinetics also strongly depends on the associated potentiodynamic parameters, such as scan rate and scan region, which have a great effect on the coverage of adsorbed OHad/Oad on Pt surface, thereby affecting the ORR activities of both nanosized and bulk Pt. However, the apparent Tafel slopes remained nearly the same, indicating that the ORR mechanism in all the measurements was not affected by different potentiodynamic parameters.

Polymer Electrolyte Fuel Cell Degradation

2012 Technology & Engineering
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Release : 2012
Genre : Technology & Engineering
Kind : eBook
Book Rating : 366/5 ( reviews)

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Book Synopsis Polymer Electrolyte Fuel Cell Degradation by : Matthew M. Mench

Download or read book Polymer Electrolyte Fuel Cell Degradation written by Matthew M. Mench. This book was released on 2012. Available in PDF, EPUB and Kindle. Book excerpt: For full market implementation of PEM fuel cells to become a reality, two main limiting technical issues must be overcome- cost and durability. This cutting-edge volume directly addresses the state-of-the-art advances in durability within every fuel cell stack component. [...] chapters on durability in the individual fuel cell components -- membranes, electrodes, diffusion media, and bipolar plates -- highlight specific degradation modes and mitigation strategies. The book also includes chapters which synthesize the component-related failure modes to examine experimental diagnostics, computational modeling, and laboratory protocol"--Back cover.

The Rotating Disc Electrode

1976-12 Science
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Release : 1976-12
Genre : Science
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Book Synopsis The Rotating Disc Electrode by : I︠U︡riĭ Viktorovich Pleskov

Download or read book The Rotating Disc Electrode written by I︠U︡riĭ Viktorovich Pleskov. This book was released on 1976-12. Available in PDF, EPUB and Kindle. Book excerpt: Important advances in a subject are as often promoted by a new technique as by new concepts and theories. In the study of electrode reactions which involve diffusion in a primary or a secondary step, the development and use of techniques involving rotating disc electrodes and derived instrumentation based on ring-disc and split-ring systems has enabled advances of great importance to be made in the quantitative examination of diffusion processes at electrodes and their role in electrode processes generally. The technique allows precisely defined mass-transport conditions to be set up which can be subjected to exact mathe matical analysis so that quantitative treatment of hydrodynamic and diffusion behavior can be made. Of special interest for elec trochemists is the opportunity which the rotating ring-disc system offers for studying solution-soluble intermediates in sequential electrode processes and the kinetics of their reactions in solution. In this book by Pleskov and Filinovskii, both the experimental techniques and the mathematical analysis for the treatments of results for various conditions and types of reaction are described in detail. We believe that presentation of work that has been car ried out by means of rotating electrode techniques, to a large extent by Russian workers, in the form of a concise book will be of great value both to electrochemists and kineticists, and those interested in the physics of fluid motion.

PEM Fuel Cell Electrocatalysts and Catalyst Layers

2008-08-26 Technology & Engineering
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Release : 2008-08-26
Genre : Technology & Engineering
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Book Rating : 364/5 ( reviews)

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Book Synopsis PEM Fuel Cell Electrocatalysts and Catalyst Layers by : Jiujun Zhang

Download or read book PEM Fuel Cell Electrocatalysts and Catalyst Layers written by Jiujun Zhang. This book was released on 2008-08-26. Available in PDF, EPUB and Kindle. Book excerpt: Proton exchange membrane (PEM) fuel cells are promising clean energy converting devices with high efficiency and low to zero emissions. Such power sources can be used in transportation, stationary, portable and micro power applications. The key components of these fuel cells are catalysts and catalyst layers. “PEM Fuel Cell Electrocatalysts and Catalyst Layers” provides a comprehensive, in-depth survey of the field, presented by internationally renowned fuel cell scientists. The opening chapters introduce the fundamentals of electrochemical theory and fuel cell catalysis. Later chapters investigate the synthesis, characterization, and activity validation of PEM fuel cell catalysts. Further chapters describe in detail the integration of the electrocatalyst/catalyst layers into the fuel cell, and their performance validation. Researchers and engineers in the fuel cell industry will find this book a valuable resource, as will students of electrochemical engineering and catalyst synthesis.

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