Adsorption of Organic Compounds on Solid Metal Electrodes PDF Download

Author: Dominicus Adrianus Johannes Swinkels
Publisher:
ISBN:
Category :
Languages : en
Pages : 488

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Author: Boris Damaskin
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 524

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The systematic study of the adsorption of organic compounds on electrodes began with the comprehensive survey of adsorption on mercury carried out by Gouy in the first decade of this century. His studies with the capillary electrometer are still useful but do not lend themselves to detailed quantitative analysis. A more de tailed study of a few systems by Frumkin in his thesis (1919) led him to propose a quantitative phenomenological theory of organic adsorption (1925, 1926) at almost the same time as Stern proposed the model of the electrical double layer which remains the picture accepted in general terms today. The attempt at a molecular model made by Butler (1929) should be more satisfying but up to the pres ent the formidable difficulties of a molecular theory of interfacial phenomena have prevented the full interpretation of experimental results along these lines. In his work with Proskurnin (1935), Frumkin is also respon sible for the major experimental advance in the demonstration that reliable measurements of the capacity of an electrode-solution interface can be obtained provided that the work is carried out under conditions of scrupulous cleanliness. Even so, preCise mea surements of double layer capacities were not obtained until Grahame (1941) showed how convenient and reliable the dropping mercury electrode was the for these studies. This method and the hanging drop electrode remain the preferred methods for study of adsorp tion on mercury. Solid electrodes present a more difficult problem.

Author: B. J. Piersma
Publisher:
ISBN:
Category :
Languages : en
Pages : 27

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A review of the methods used to investigate the adsorption of organic compounds on solid metal electrodes shows that all of the available methods have very definite limitations. In the absence of a really good method, it is wise to employ all the available techniques which give complementary information. The available experimental information obtained from electrosorption measurements is compared with the data obtained from gas-phase studies. As an example of the difficulty encountered in making a comparison of gas-phase and electrosorption measurements, it is found in the study of adsorption energetics that the heats of adsorption are much lower in electrosorption. When water vapor is present, electrosorption is most likely similar to competitive gas-phase adsorption. A discussion of the energetics of adsorption clearly shows the competitive nature of adsorption at electrodes in solution. The adsorption characteristics of carbon monoxide, formic acid, methanol, ethanol, and hydrocarbons, especially ethylene, are discussed in some detail. A review of adsorption phenomena observed at open circuit shows that when a steady potential is established at platinized Pt electrodes in solutions of alcohols and aldehydes containing more than one carbon atom, processes of dehydrogenation and self-hydrogenation of the original substances and their decomposition products occur. (Author).

Author: Jacek Lipkowski
Publisher: New York : VCH
ISBN:
Category : Science
Languages : en
Pages : 440

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Summarizes the past ten years in the field with papers by physicists, chemists, experimentalists, and theorists. Subjects covered include molecular models of organic adsorption at metal-water interfaces, adsorption and two-dimensional phase transitions at electrode surfaces, molecular adsorption at

Author: Boris B. Damaskin
Publisher:
ISBN:
Category : Adsorption
Languages : en
Pages : 499

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Author: Boris Damaskin
Publisher: Springer
ISBN: 9781461581925
Category : Science
Languages : en
Pages : 0

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Book Description
The systematic study of the adsorption of organic compounds on electrodes began with the comprehensive survey of adsorption on mercury carried out by Gouy in the first decade of this century. His studies with the capillary electrometer are still useful but do not lend themselves to detailed quantitative analysis. A more de tailed study of a few systems by Frumkin in his thesis (1919) led him to propose a quantitative phenomenological theory of organic adsorption (1925, 1926) at almost the same time as Stern proposed the model of the electrical double layer which remains the picture accepted in general terms today. The attempt at a molecular model made by Butler (1929) should be more satisfying but up to the pres ent the formidable difficulties of a molecular theory of interfacial phenomena have prevented the full interpretation of experimental results along these lines. In his work with Proskurnin (1935), Frumkin is also respon sible for the major experimental advance in the demonstration that reliable measurements of the capacity of an electrode-solution interface can be obtained provided that the work is carried out under conditions of scrupulous cleanliness. Even so, preCise mea surements of double layer capacities were not obtained until Grahame (1941) showed how convenient and reliable the dropping mercury electrode was the for these studies. This method and the hanging drop electrode remain the preferred methods for study of adsorp tion on mercury. Solid electrodes present a more difficult problem.

Author: Alar Jänes
Publisher:
ISBN:
Category : Electrodes
Languages : en
Pages : 224

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Author: Boris Borisovich Damaskin
Publisher:
ISBN:
Category : Adsorption
Languages : en
Pages : 515

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Author: Eliezer Gileadi
Publisher: Springer Science & Business Media
ISBN: 1468417312
Category : Science
Languages : en
Pages : 234

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The gradual emergence during the last decade of the study of the mechanism of electrode reactions from the dark ages has given stimulus to a consideration of the double layer at metal-solution interfaces, which extends far outside the classical experimental studies of the capacitance of the mercury solution interface made during the 1950's by D. C. Grahame at Amherst College, Massachusetts. The central aspect of the study of an electrode reaction is the elucidation of its path and rate-determining step. Two fields are, however, prerequisites for such studies. First, it must be known what species are in the bulk of the solution, for these will seldom be simple ones such as H30~ and this study ("complex ions") has been made with both extent and depth. Second, the occupancy of the surface of the electrocatalyst and the associated field gradients must be known as a function of position in the double layer. Such "maps of the double layer" can be given with reasonable certainty up to concentrations of about 1 N for mercury in contact with solutions of inorganic ions. However, this is-or was until very recently-the extent of the know ledge. The problems confronting a fundamental approach to the rational development of, e.g., fuel cell catalysis were therefore considerable.

Author: Naval Research Laboratory (U.S.)
Publisher:
ISBN:
Category : Naval research
Languages : en
Pages : 308

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