ISSN:
1573-9171
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary 1. The effects of various surface-active additives on the electrochemical behavior of an iron electrode in 2 N NaOH were investigated with the aid of measurements of capacity in an alternating current and of determinations of polarization curves. 2. Octyl alcohol molecules and tetrabutylammonium, naphthalenesulfonate, and hexanoate ions do not reduce the capacity of an iron electrode and have little effect on the hydrogen overvoltage; these species, therefore, are not adsorbed appreciably on the iron surface. 3. Compounds that are able to react chemically with ions or oxides of iron (tannin, alizarin, arsenious oxide, and to a lesser extent phenol) greatly reduce the capacity of an iron electrode at potentials more negative than the stationary potential, and they also raise the hydrogen overvoltage to some extent; this indicates that these compounds are adsorbed at the slightly oxidized iron surface. At potentials that are more positive than the stationary potential, these additives (with the exception of arsenic) have no effect on the capacity and are. probably desorbed from the iron surface.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01171961
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