Author
Gerhard Kreysa
Other affiliations: Autonomous University of Baja California
Bio: Gerhard Kreysa is an academic researcher from DECHEMA. The author has contributed to research in topics: Electrolysis & Electrochemical engineering. The author has an hindex of 22, co-authored 78 publications receiving 1305 citations. Previous affiliations of Gerhard Kreysa include Autonomous University of Baja California.
Papers published on a yearly basis
Papers
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Book•
18 Feb 1999
TL;DR: The scope and history of Electrochemical Engineering can be found in this article, where basic principles and laws in Electrochemistry are discussed and a detailed overview of the major steps in the development of industrial processes is presented.
Abstract: 1 The Scope and History of Electrochemical Engineering.- 2 Basic Principles and Laws in Electrochemistry.- 3 Electrochemical Thermodynamics.- 4 Electrode Kinetics and Electrocatalysis.- 5 Mass Transfer by Fluid Flow, Convective Diffusion and Ionic Electricity Transport in Electrolytes and Cells.- 6 Electrochemical Reaction Engineering.- 7 Electrochemical Engineering of Porous Electrodes and Disperse Multiphase Electrolyte Systems.- 8 Electrochemical Cell and Plant Engineering.- 9 Process Development.- 10 Industrial Electrodes.- 11 Industrial Processes.- 12 Fuel Cells.
133 citations
TL;DR: In this article, six commercially available and six especially designed amorphous metals have been investigated by steadystate polarization measurements and cyclic voltammetry to evaluate their suitability as electrocatalysts for hydrogen and oxygen evolution in alkaline solution.
118 citations
Book•
01 Jan 2014TL;DR: In this paper, the authors describe a process for process design of Mass, Heat, and Charge Transfer in the process of electrochemical reaction engineering, which is a process similar to the one in this paper.
Abstract: Fuel Cells.- Primary Batteries.- Rechargeable Batteries.- Supercapacitors.- Photoelectrochemistry and related areas.- Electrochemical Instrumentation & Laboratory Techniques.- Electrochemical Thermodynamics.- Kinetics and Electrocatalysis.- Solid state electrochemistry.- Corrosion Metal Plating.- Electrochemical machining.- Organic electrochemistry.- Electrokinetic Phenomena.- Electrode Materials.- Electrolytes.- Electroanalysis.- Sensors.- Inorganic Electrochemical Synthesis.- Bioelectrochemistry Semiconductors (synthesis and electrochemistry).- Environmental electrochemistry.- Electrochemical Engineering.- Electrochemical Engineering - Process Design Mass, Heat, and Charge Transfer.- Electrochemical Reactor Design and Operation and Electrochemical Reaction Engineering.- Molten Salts.- Nanoelectrochemistry.- High-temperature.- Electrochemistry Electrode Design.- Electrophoretic Coating Ionic Liquids.- Metal Refining.- Metal Rewinning.- Thermoelectrochemistry.- Industrial Cell Design.- Biocorrosion.
96 citations
TL;DR: In this article, steady state polarization curves for hydrogen evolution in alkaline solution at crystalline and amorphous nickel electrodes were measured at different temperatures, showing at higher c.d. the establishment of a limiting c.iR-corrected steady-state polarization curve for increasing Had coverage.
65 citations
TL;DR: A critical review of experimental gas voidage data for gas-liquid mixtures available in the literature yields the result that these data cannot be explained by known theories of the gas hold-up as mentioned in this paper.
Abstract: A critical review of experimental gas voidage data for gas—liquid mixtures available in the literature yields the result that these data cannot be explained by known theories of the gas hold-up. Based on the empirical experience that bubble coalescence is hindered in electrolyte solutions, new equations are derived for the calculation of the gas voidage as a function of the superficial gas velocity by introducing a coalescence barrier model. Experimental investigations confirm the theoretical prediction of the existence of a limiting gas voidage which is a characteristic quantity of each gas—electrolyte combination.
64 citations
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3,645 citations
TL;DR: In this article, the development, design and applications of electrochemical technologies in water and wastewater treatment are reviewed with particular focus on electrodeposition, electrocoagulation, electroflotation (EF), and electrooxidation.
2,577 citations
Book•
18 Jun 2014TL;DR: In this paper, the fundamental processes of diffusion and faradaic reaction at electrodes are discussed and a review of the applications of these processes can be found in a forthcoming volume in this series.
Abstract: Electrochemical impedance spectroscopy has become a mature and well-understood technique. It is now possible to acquire, validate, and quantitatively interpret the experimental impedances. This chapter has been addressed to understanding the fundamental processes of diffusion and faradaic reaction at electrodes. However, the most difficult problem in EIS is modeling the electrode processes, which is where most of the problems and errors arise. There is an almost infinite variety of different reactions and interfaces that can be studied (corrosion, coatings, conducting polymers, batteries and fuel cells, semiconductors, electrocatalytic reactions, chemical reactions coupled with faradaic processes, etc.) and the main effort is now being applied to understanding and analyzing these processes. These applications will be the subject of a second review in a forthcoming volume in this series.
1,270 citations
01 Feb 2012
TL;DR: The possible configurations allowing the integration of water electrolysis units with renewable energy sources in both autonomous and grid-connected systems are presented and some relevant demonstration projects are commented.
Abstract: This paper reviews water electrolysis technologies for hydrogen production and also surveys the state of the art of water electrolysis integration with renewable energies. First, attention is paid to the thermodynamic and electrochemical processes to better understand how electrolysis cells work and how they can be combined to build big electrolysis modules. The electrolysis process and the characteristics, advantages, drawbacks, and challenges of the three main existing electrolysis technologies, namely alkaline, polymer electrolyte membrane, and solid oxide electrolyte, are then discussed. Current manufacturers and the main features of commercially available electrolyzers are extensively reviewed. Finally, the possible configurations allowing the integration of water electrolysis units with renewable energy sources in both autonomous and grid-connected systems are presented and some relevant demonstration projects are commented.
1,026 citations
TL;DR: While considerable chemical development of enzyme electrodes has occurred, relatively little progress has been made towards the engineering development of biofuel cells.
940 citations