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The desorption of n-decyltriethylammonium ion at negative potentials at a mercury electrode

✍ Scribed by J.B. Hayter; M.W. Humphreys; R.J. Hunter; Roger Parsons

Publisher
Elsevier Science
Year
1974
Weight
233 KB
Volume
56
Category
Article
ISSN
0022-0728

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✦ Synopsis

The adsorption of long chain quaternary ammonium ions at a mercury electrode was studied recently by the capacity and drop-time methods 1-s. An unusual feature of this system was the behaviour of the capacity peak at negative potentials. In many other systems 6 this peak corresponds to the desorption-adsorption (desad) process of the surface active species. However, a careful study of the system containing long chain quaternary ammonium ions suggested that in this case the peak could be ascribed to a re-orientation rather than a desad process. To test this explanation more rigorously we have investigated this system by the ellipsometric method 7 as well as measuring interfacial tensions by the maximum bubble pressure method s .

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