Author: Hing Y. LoPublisher:
ISBN:
Category :
Languages : en
Pages : 120
Book Description
Heterogeneous Reactions with Rotating Disk Electrode
Author: Hing Y. LoRotating Disk Electrode to Measure Diffusivity of Metal Ions and Kinetic Parameters in Heterogeneous Electrochemical Reactions
Author: Shital Babu RijalPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Chemical reaction rates are generally amplified by using a catalyst and lowering the reaction energy barrier, or by raising the temperature or pressure of the system to increase reactants' thermal energy. Regarding electrochemical reactions in solutions, we hypothesize that a rapidly changing electric field will enhance the Brownian motion of reactant ions to increase their effective temperature. Hence this technique, termed stochastic heating, is an attractive alternative for reaction rate enhancement. To test this hypothesis, we need to characterize the kinetics of the chemical reaction. Here we use a rotating disk electrode to measure the kinetic parameters and diffusivity of metal ions in the following electrochemical systems. We present a self-verifiable procedure to measure the heterogeneous rate constant of ferrous/ferric ions at the platinum electrode and their diffusivity in the chloride system. We determine favorable supporting electrolytes for studying silver and indium ions and for characterizing their kinetics. The quantities thus measured are trustworthy bases for comparing with modified systems to enhance the reaction rate in the presence of stochastic noise.
Application of the Rotating Ring-disc Electrode to the Study of Heterogeneous and Homogeneous Reactions
Author: Dennis Charles JohnsonPublisher:
ISBN:
Category : Electrochemical analysis
Languages : en
Pages : 636
Book Description
A Rotating Disc for Determining the Kinetics of Heterogeneous Reactions
Author: Peter P. PranisElectrode Kinetics: Reactions
Author: R.G. ComptonPublisher: Elsevier
ISBN: 0080868215
Category : Science
Languages : en
Pages : 383
Book Description
Volumes 26 and 27 are both concerned with reactions occurring at electrodes arising through the passage of current. They provide an introduction to the study of electrode kinetics. The basic ideas and experimental methodology are presented in Volume 26, whilst Volume 27 deals with reactions at particular types of electrodes.Chapter 1 of the present volume deals with redox reactions at metal electrodes, Chapter 2 with semiconducting electrodes and Chapter 3 with reactions at metal oxide electrodes. Both theoretical aspects and experimental results are covered.
The Rotating Disc Electrode
Author: I︠U︡riĭ Viktorovich PleskovPublisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 428
Book Description
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.
A Study of the Kinetics of Diffusionally Limited Heterogeneous Reactions on a Rotating Disc
Author: George John HeymachPublisher:
ISBN:
Category : Heterogeneous catalysis
Languages : en
Pages : 241
Book Description
Kinetics of Simple Inner- and Outer-Sphere Electrochemical Reactions at Rotating Silver Electrodes as Examined Using Surface-Enhanced Raman Spectroscopy
Author: S. FarquharsonPublisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
An application of surface-enhanced Raman spectroscopy (SERS) to evaluating the kinetics of electrochemical reactions is outlined. This involves monitoring the potential-dependent SERS intensities of the adsorbed reactant at a rotating disk electrode in a potential region where the kinetics are under mixed mass transfer-heterogeneous electron transfer control. Comparisons are made between the kinetic behavior extracted from the SERS intensity-potential dependence and that obtained from the faradaic current flow.
Modern Aspects of Electrochemistry No. 6
Author: J. O'M. BockrisPublisher: Springer Science & Business Media
ISBN: 1468430009
Category : Science
Languages : en
Pages : 393
Book Description
In the last decade, the evolution of electrochemistry away from concern with the physical chemistry of solutions to its more fruitful goal in the study of the widespread consequences of the transfer of electric charges across interphases has come to fruition. The turning of technology away from an onward rush, regardless, to progress which takes into account repercussions of techno logical activity on the environment, and the consequent need for a reduction and then termination of the injection of CO into 2 the atmosphere (greenhouse effect), together with a reckoning with air and water pollution in general, ensures a long-term need for advances in a basic knowledge of electrochemical systems, an increased technological use of which seems to arise from the environmental necessities. But a mighty change in attitude needs to spread among electro chemists (indeed, among all surface chemists) concerning the terms and level in which their field is discussed. The treatment of charge transfer reactions has often been made too vaguely, in terms, it seemed, of atom transfer, with the electron-transfer step, the essence of electrochemistry, an implied accompaniment to the transfer of ions across electrical double layers. The treatment has been in terms of classical mechanics, only tenable while inadequate questions were asked concerning the behavior of the electron in the interfacial transfer. No process demands a more exclusively quantal discussion than does electron transfer.
Corrosion of Metals and Hydrogen-Related Phenomena
Author: J. FlisPublisher: Elsevier
ISBN: 1483291723
Category : Technology & Engineering
Languages : en
Pages : 409
Book Description
It is estimated that about 40% of the annual production of metals is used to repair or replace materials damaged by corrosion. Corrosion causes waste of the natural material and energy resources, it creates serious materials problems for many technologies and adversely affects almost every area of engineering. The use of metals in various aggressive environments has resulted in an extremely wide diversity of corrosion problems. This book presents a collection of concise reviews written by experts in the field on selected topics of metallic corrosion and on some aspects of interaction of hydrogen with metals. A comprehensive range of problems is examined including localized corrosion, high temperature corrosion in liquid metals and molten salts, transport control in corrosion processes, entry of hydrogen into metals, hydrogen embrittlement, and hydrogen reactions with metals. The variety of topics covered in the book will provide corrosion scientists, engineers, university lecturers and students alike with an interdisciplinary approach to solving problems of materials degradation and surface processes in metal corrosion.