Modern Aspects of Electrochemistry

The present volume is comprised of six chapters covering topics having both fundamental and substantial applied significance in electrochemistry: ion-exchange membrane behavior, corrosion and metal deposition, semiconductor charge injection, and the electro catalytic properties of carbon. In the first chapter, Verbrugge and Pintauro examine transport models for ion-exchange membranes using approaches from the direction of electrochemical thermodynamics of irreversible proces ses and others. The properties ofth~ models are examined quantita tively in some mathematical detail. Drazic, in Chapter 2, gives an up-to-date account of advances in our knowledge of the "active" dissolution of iron in corrosion processes and the accompanying processes of H2 evolution and H sorption. The important process of O reduction in iron corrosion 2 is also considered, together with the more controllable aspect of anodic dissolution and cathodic deposition, as well as the influence of anions on the dissolution kinetics of iron in aqueous medium. An important aspect of metal plating technology is the use of a modulated or pulsed-current regime to provide better control over deposit morphology. In two chapters, one by Popov and Mak simovic and the other by Pesco and Cheh, complementary aspects of this important technique are examined in detail: from the theo retical electrode-kinetic direction, taking into account the important nonsteady diffusion situation, and from the practical direction of examining the morphologies of electrodeposits generated under various AC modulated or pulsed-current regimes.

Contenu
1 Transport Models For Ion-Exchange Membranes.- I. Introduction.- II. Solution of Ion-Exchange Problems Using the Nernst-Planck Equation for Ion Transport.- III. Transport Models Based on Irreversible Thermodynamics.- IV. Experimental Methods for Membrane Analyses.- V. Conclusions.- Notation.- References.- 2 Iron and Its Electrochemistry in an Active State.- I. Introduction.- II. Hydrogen Evolution Reaction on Iron.- III. Electrochemical Reduction of Oxygen and Its Influence on the Anodic Dissolution of Iron.- IV. Cathodic Deposition of Iron.- V. Anodic Dissolution of Iron.- VI. Anomalous Dissolution of Iron.- VII. Conclusions.- References.- 3 Theory of the Effect of Electrodeposition at a Periodically Changing Rate on the Morphology of Metal Deposits.- I. Basic Definitions.- II. Surface Concentration in the Periodic Condition.- III. Current Distribution on a Microprofile.- IV. Maximum Deposition Rate.- V. Prevention of Formation of Spongy Deposits.- VI. Current Distribution on a Macroprofile.- VII. Surface Film Formation.- VIII. Energetic Aspects.- IX. Conclusions.- References.- 4 Theory and Applications of Periodic Electrolysis.- I. Introduction.- II. Effect on Morphology of Electrodeposited Metals.- III. Theoretical Aspects of Periodic Electrolysis.- IV. Conclusions.- References.- 5 Electrocatalytic Properties of Carbon Materials.- I. Introduction.- II. Physicochemical Properties of Carbon Materials.- III. Electrochemical Reactions on Carbon Materials.- IV. Chemically Modified Electrodes.- V. Conclusions.- References.- 6 Spin-Dependent Kinetics in Dye-Sensitized Charge-Carrier Injection Into Organic Crystal Electrodes.- I. Introduction.- II. Theoretical Considerations.- III. Experimental Aspects.- IV. Main Results.- V. Summary.- References.