𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Application of the Cole—Cole plot to the study of adsorption kinetics at the mercury/electrolyte-solution interface

✍ Scribed by Katsuo Takahashi


Publisher
Elsevier Science
Year
1968
Tongue
English
Weight
729 KB
Volume
13
Category
Article
ISSN
0013-4686

No coin nor oath required. For personal study only.

✦ Synopsis


The interfacial impedance was measured at the interface between mercury and aqueous electrolyte solutions containing some organic surface-active substances. The f 3 uency dispersion of the interfacial impedance asso&ted with the adsorption-desorption process 0 the organic substances was analysed by the method of Cole and Cole. The shapes of the Cole-Cole plot have been put into two groups, and the physical meaning of each group is explained in terms of the adsorption kinetics. Under certain conditions, the rate of adosrption of octyl-or decyl-sulphate ions is controlled by an activation process, whereas the adsorption of alcohols is controlled by the rate of diffusion. Electrical equivalent circuits have been determined for the two kinds of adsorption-desorption process.

R&ann&Mesure de l'impedance a l'interface mercure/6lectrolyte en solution aqueuse contenant quelques substances organiques surfactantes. La dispersion de fr&ptence de l'imp6dance interfaciale associb au processus adsorptiondesorption des substances organiques a 6te analysQ par la m&ode de Cole et Cole. Les formes des representations de Cole-Cole ont et6 class&s en deux groupes, la signification physique de chacun d'eux pouvant &re interpr6t6e en termes de cinbtique d'adsorption. Sous certaines conditions, la vitesse d'adsorption des ions octyl ou decyl-sulfate est control& par un processus d'activation bien que l'btape r&k&ice de Padsorption des alcools soit la diffusion. Des circuits &ctriques equivalents sont justifies pour chacune des sortes de processus adsorptiondesorption. Z~egMan ermittelte die Gmnzl%chenimpedanz an Quecksilber/wllssriger Elektrolyt-l&sung, welche verschiedene ober&henaktive organische Substanzen enthielten. Die mit dem Adsorption-Desorptionsproress der organ&hen Stoffe verbundene Frequenzdispersion wurde mit Hilfe der Methode von Cole und Cole untersucht. Der Verlauf der Cole-Cole-Kurven wurde in zwei Abschniti ein


📜 SIMILAR VOLUMES


The adsorption of trifluoromethanesulfon
✍ E.R. Gonzalez; S. Srinivasan 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 425 KB

Recently, there has been muchinterest in the useof trifluoromethanesulfonic acid as anelectrolyte in advanced fuel cell systems because of the enhanced rate of oxygen reduction in this medium. In order to elucidate this characteristic from a double layer point of view, the present work was undertake

The specific adsorption of naphthalenesu
✍ Edward Dutkiewicz; Jolanta Stuczynska 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 403 KB

The adsorption of M-naphthalenesulfonate, B-naphthalenesulfonate and 1, 5-naphthalenedisulfonate ions on mercury from an aqueous solution at constant ionic strength has been investigated by measurement of the double layer capacity as a function of concentration. The adsorption can be represented by

Effect of the Supporting Electrolyte on
✍ Antonis Avranas; Utz Retter; Klaus Lunkenheimer 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 149 KB

The adsorption and the changes in the interfacial composition of octanoic acid at the mercury/electrolyte interface was studied by measuring the differential capacitance at different concentrations of the supporting electrolyte, at various supporting electrolyte systems and at various temperatures.

Adsorption of poly-DL-alanine at the mer
✍ Setsuko Nakamura; Michiko Nakamura 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 379 KB

The adsorption of poly-o~-alanine (mean molecular weight 3900) at the mercurysolution interface was studied by means of diflerential capacity and surface tension measurements. The poly-DLalanine adsorbed in the potential region between 0.0 and -1.6 V (see). At the potentials of -0.5 and -1 .l V the

Adsorption behaviour of trifluoromethane
✍ E.R. Gonzalez; A. Carubelli; S. Srinivasan 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 498 KB

A comparison is made of the adsorption behaviour of CF,SO; ions on mercury from single salt and constant ionic strength solutions. For this purpose, thermodynamic analysis was made of the experimental results of measurements of capacitance, potentials of zero charge and surface tensions from single

Adsorption of Ribonuclease A and Lysozym
✍ Jasmina Vidić; Desanka Sužnjević; Milenko Erceg; Dušan Vučelić 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 59 KB

The adsorption of lysozyme and RNase A at a dropping mercury electrode from 0.1 M Tris-HCl ϩ 1 mM EDTA ϩ 0.2 M KCl buffer solution (pH 8.8) was investigated by applying phase-sensitive alternating current polarography. Both proteins are strongly adsorbed over a wide range of electrode potential arou