Investigation of adsorption of organic substances by differential capacitance measurementsстатья
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Дата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
Автор:
Damaskin B.B.
Журнал:
Electrochimica Acta
Том:
9
Номер:
3
Год издания:
1964
Издательство:
Elsevier BV
Местоположение издательства:
Netherlands
Первая страница:
231
Последняя страница:
240
Аннотация:
By using the frumkin isotherm and taking into consideration the dependence of the attraction constant on the electrode potential (φsymbol), it is possible to interpret quantitatively the C/φsymbol curves (C is the differential capacitance) of the mercury electrode in the presence of aliphatic organic compounds (t-C5 H11OH; n-C5H11OH; i-C5H11OH; n-C4H9COOH). The constants necessary for the calculation characterize the adsorption state (the adsorption energy, the orientation of the molecules on the surface, and the adsorption potential) and allow the calculation of the dependence of the coverage on the potential and on the concentration of the organic substance. In the case of adsorption of pyridine and aniline on mercury, the C/φsymbol curves are also characterized by the presence of two peaks. But, as shown by the comparison of the calculated values with the experimental ones, the anodic peaks observed are due to a change in the orientation of adsorbed molecules upon the transition to positive mercury charge, rather than to their desorption. © 1964.
Добавил в систему:
Дамаскин Борис Борисович