Includes bibliographical references and index.
|Statement||Matthew N. Eisler|
|Series||Studies in modern science, technology, and the environment|
|LC Classifications||TK2931 .E38 2011|
|The Physical Object|
|LC Control Number||2011012792|
"A very fine book. Overpotential unpacks the more complex, and infinitely more interesting, story of the intertwining of technological developments concerning electrical power and the search for new sources of cheap, safe, efficient electricity." Quest: The History of SpaceflightBook Edition: First Edition. Overpotential is the current-producing potential difference between a nonequilibrium electrode potential and its corresponding equilibrium value for an electrode reaction. This article provides information on overpotential of an electrode reaction. It contains a table that lists overpotential values based on the electrode reaction. Overpotential: Fuel Cells, Futurism, and the Making of a Power Panacea; Matthew Eisler ; Book; Published by: Rutgers University Press; Series: Studies in Cited by: 4. Overpotential: Fuel Cells, Futurism, and the Making of a Power Panacea. By Matthew N. Eisler. New Brunswick: Rutgers University Press, Acknowledgments, notes, index. Pp. ix – ISBN: Hardcover with dustjacket. $ USD. I have been interested in fuel cells since NASA began using them for electrical power in the Gemini program of.
Overpotential is the difference between the theoretical half-reaction reduction potential and the actual voltage required. When present, the applied potential must be increased, making it possible for a different reaction to occur in the electrolytic : OpenStax. Then overpotential may be estimated by using the following eqn. Overpotential = E - E eq where E is the potential at which redox reaction takes place, i.e., flow of current occurs in the I-V curve. Explanation: The additional potential (beyond the thermodynamic requirement) needed to drive an electrochemical reaction at a certain rate is called the overpotential. Over potential = [Electrode potential - Equilibrium potential Practical example. Electrochemistry is the study of reactions in which charged particles (ions or electrons) cross the interface between two phases of matter, typically a metallic phase (the electrode) and a conductive solution, or electrolyte. A process of this kind can always be represented as a chemical reaction and is known generally as an electrodeFile Size: KB.
quantitative relationship between activation overpotential (η. a) and current density has to be specified for the half-cell reactions occurring at both electrodes. The Butler-Volmer equation(BVE) relates η. a. to and is derived in the next section. i. The Butler-Volmer equation. Let us consider the following half-cell reaction Pn+ + ne = Q. Define, PnFile Size: KB. Activation overpotential, also called surface overpotential, is the potential difference above the equilibrium potential required to overcome the activation energy of the cell reaction to produce a specified current. This overpotential is closely related with Steps above. What is an Overpotential? When two or more complementary processes such as those illustrated for zinc in air-free hydrochloric acid, for magnesium in neutral water, or for zinc in aerated hydrochloric acid occur over a single metallic surface, the corrosion potential that results from this situation is a compromise between the various equilibrium potentials of all the anodic and cathodic. Overpotential () Deviation from the equilibrium potential (extra driving force) = E - E eq The reaction overpotential can be reduced or eliminated with the use of homogeneous or heterogeneous electrocatalysts. The electrochemical reaction rate and related current density is dictated by the kinetics ofFile Size: 2MB.