The mechanism and kinetics of Zn2+ electroreduction in the presence of octyltrimethylammonium bromide

Nieszporek, Jolanta

doi:10.1016/j.jelechem.2013.08.007

Cited by 8 publications

(4 citation statements)

References 25 publications

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“…2232 However, the use of surfactants in this aspect seems to be an attractive and still open subject for electrochemists. Our earlier investigations showed an inhibiting effect of the following surfactants: a cationic one octyltrimethylammonium bromide 33 and two nonionic ones N-octanoyl-N-methylglucamine and N-decanoyl-N-methylglucamine 34 on the kinetics of Zn 2+ ion electroreduction on a mercury electrode. It should be noted that out of two analyzed nonionic surfactants the N-decanoyl-N-methylglucamine emerged as a stronger inhibitor.…”

Section: Introductionmentioning

confidence: 96%

Experimental and Theoretical Studies of Anionic Surfactants Activity at Metal/Solution Interface: The Influence of Temperature and Hydrocarbon Chain Length of Surfactants on the Zinc Ions Electroreduction Rate

Nieszporek

2018

Bulletin of the Chemical Society of Japan

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The effect of concentration of two anionic surfactants sodium 1-octanesulfonate and sodium 1-decanesulfonate in the temperature range 288318 K on the kinetics and mechanism of electroreduction of Zn 2+ ions was studied using electrochemical impedance spectroscopy (eis) and other electrochemical methods. It was found that the process of electroreduction proceeds in two steps. To describe the mechanism of Zn 2+ amalgamation, the Fawcett's models were considered: CE (chemical step C, electron transfer step E), IE (ion transfer step I, electron transfer step E) and IA (ion transfer step I, adsorption step A). The results of theoretical investigations suggest that the IE model is the most probable mechanism of the process. Both surfactants were found to exert a catalytic effect on the analyzed electrode process. The accelerating abilities of the surfactants were found to increase with the growth of the length of their hydrocarbon chain and with the increase of temperature. The observations concerning the mechanism of the electrode reaction and its acceleration caused by surfactants were confirmed by the parameters calculated from temperature dependencies.

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Section: Introductionmentioning

confidence: 96%

Experimental and Theoretical Studies of Anionic Surfactants Activity at Metal/Solution Interface: The Influence of Temperature and Hydrocarbon Chain Length of Surfactants on the Zinc Ions Electroreduction Rate

Nieszporek

2018

Bulletin of the Chemical Society of Japan

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“…Accurate theoretical research on the adsorption is possible on mercury electrodes (Kalvoda, 2007;Vyskocil, et al ., 2009;Barek, 2013). Very good reproducibility of the results obtained on the dropping mercury electrode results from homogeneity and purity of the double layer interface mercury -solution in comparison to solid electrodes and the possibility of using various measurement methods (Nieszporek, et al, 2019;Nieszporek , 2020;Kaliszczak, et al, 2020;Nosal-Wiercinska., et al 2020;Prado, et al, 2001;Sieńko et al, 2009;Nieszporek et al, 2018;Nieszporek, 2013).…”

Section: Introductionmentioning

confidence: 99%

Adenine adsorption in different pH acetate buffer

Gugała-Fekner¹

2021

Physicochem. Probl. Miner. Process.

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The research results facilitate the description of adenine adsorption on the mercury electrode with reference to the pH of the supporting electrolyte which was the acetate buffer with pH of 3, 4, 5 and 6. The thermodynamic analysis indicates that the curves of the differential capacity of the studied systems with adenine do not overlap with the curves for the supporting electrolyte -the acetate buffer. This indicates the occurrence of adsorption of the studied compound on the mercury electrode within the whole range of applied concentrations in the case of every tested pH value of the acetate buffer. Adsorption energy and interaction constants were determined using the Frumkin isotherm and the viral isotherm. It was demonstrated that a adenine molecule is adsorbed on the mercury electrode in a buffer with pH 4, 5 and 6 through the negative pole, whereas in a buffer with pH 3 through the positive pole. Physical adsorption was observed in the studied systems. This is indicated by the occurrence of a typical maximum on the curve of the relation the relative surface excess amounts and the potential of the electrode; crossed curves of the following relation surface charge of the electrode from its potential (surface charge of the electrode from its potential σ = f(E)) at one point and, thus, the possibility of determining electrical parameters characterizing maximum adsorption as well as the absence of linearity of the function free energy of adsorption as a function of electrode potential ∆G 0 = f(E).

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“…5), and the curves' slopes change with the change of the potential and chlorates (VII) concentration. Some characteristics of k f change in the function of the potential points at the existence of the multistage process of Bi (III) ions electroreduction [13][14][15][16][17][18][19]. It also .…”

Section: The Impedance Measurementsmentioning

confidence: 91%

The Influence of Protonation on the Electroreduction of Bi (III) Ions in Chlorates (VII) Solutions of Different Water Activity

et al. 2015

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We examined the electroreduction of Bi (III) ions in chlorate (VII) solutions under varied protonation conditions of the depolariser using voltammetric and impedance methods. The results of the kinetic parameter correlation lead to the statement that the changes in the amount of chloric (VII) acid against the amount of its sodium salt in the supporting electrolytes of the low water activity have a significant influence on the rate of Bi (III) ion electroreduction. The increase of the concentration of chloric acid sodium salt, as well as the chloric (VII) acid alone within the particular concentration of the supporting electrolyte, inhibits the process of Bi (III) ion electroreduction. It should be associated with the reorganisation of the structure of the double layer connected with the slow dehydration inhibited by ClO 4 − ions. The standard rate constants k s values with the increase of the chlorate (VII) concentrations for all the solutions examined of chlorates (VII) confirms the catalytic influence of the decrease of water activity on the process of Bi (III) ion electroreduction. The multistage process is confirmed by the non-rectilinear 1nk f =f(E) dependences.

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The mechanism and kinetics of Zn2+ electroreduction in the presence of octyltrimethylammonium bromide

Cited by 8 publications

References 25 publications

Experimental and Theoretical Studies of Anionic Surfactants Activity at Metal/Solution Interface: The Influence of Temperature and Hydrocarbon Chain Length of Surfactants on the Zinc Ions Electroreduction Rate

Experimental and Theoretical Studies of Anionic Surfactants Activity at Metal/Solution Interface: The Influence of Temperature and Hydrocarbon Chain Length of Surfactants on the Zinc Ions Electroreduction Rate

Adenine adsorption in different pH acetate buffer

The Influence of Protonation on the Electroreduction of Bi (III) Ions in Chlorates (VII) Solutions of Different Water Activity

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