Infrared Studies of the Potential Controlled Adsorption of Sodium Dodecyl Sulfate at the Au(111) Electrode Surface

Langmuir ◽  
2012 ◽  
Vol 28 (5) ◽  
pp. 2455-2464 ◽  
Author(s):  
J. Jay Leitch ◽  
John Collins ◽  
Andreas Kaspar Friedrich ◽  
Ulrich Stimming ◽  
John R. Dutcher ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Electrode Surface ◽  
Sodium Dodecyl ◽  
Infrared Studies ◽  
Dodecyl Sulfate ◽  
Controlled Adsorption

scholarly journals Protection of Brass in HCl Solution by L-Cysteine and Cationic Surfactant

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Milan B. Radovanovic ◽  
Zaklina Z. Tasic ◽  
Marija B. Petrovic Mihajlovic ◽  
Milan M. Antonijevic
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Electrode Surface ◽  
Active Sites ◽  
Inhibition Efficiency ◽  
Sodium Dodecyl ◽  
Inhibition Mechanism ◽  
Eds Analysis ◽  
Dodecyl Sulfate ◽  
Brass Surface ◽  
Hcl Solution

Electrochemical behavior of brass and inhibitory effect of L-cysteine in HCl solution are investigated using electrochemical techniques in addition to SEM-EDS analysis. Results show that inhibition efficiency depends on inhibitor concentration and immersion time of brass electrode in inhibitor solution. Electrochemical test results point to formation of Cu(I)-cysteine complex on the brass surface in chloride solutions with addition of different amounts of cysteine. The formed complex has an important role in inhibition of the corrosion process in the examined media because Cu(I)-cysteine significantly reduces dissolution of brass. Curves obtained in acidic solution in the presence of cysteine after pretreatment in sodium dodecyl sulfate (SDS) by cyclic measurements and potentiodynamic polarization measurements indicate intense inhibition of corrosion processes. Efficient inhibition of brass dissolution is result of formation of a stable protective layer on the brass surface after pretreatment of the electrode in SDS solution. The brass surface is modified in sodium dodecyl sulfate solution in order to increase cysteine adsorption on the electrode surface and to improve inhibition efficiency. Inhibition mechanism of cysteine includes adsorption on active sites on the electrode surface, which is confirmed by SEM-EDS analysis of brass. Adsorption of cysteine in hydrochloric acid solution obeys the Langmuir adsorption isotherm. Also, Gibbs free energy of adsorption has a value of −31.5 kJ/mol and indicates strong adsorption of cysteine on the electrode surface.

SEIRAS Studies of Water Structure in a Sodium Dodecyl Sulfate Film Adsorbed at a Gold Electrode Surface

Langmuir ◽  
2015 ◽  
Vol 31 (15) ◽  
pp. 4411-4418 ◽  
Author(s):  
Michael Grossutti ◽  
J. Jay Leitch ◽  
Ryan Seenath ◽  
M. Karaskiewicz ◽  
Jacek Lipkowski
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Electrode Surface ◽  
Gold Electrode ◽  
Sodium Dodecyl ◽  
Water Structure ◽  
Dodecyl Sulfate

scholarly journals Effects of water and sodium dodecyl sulfate additives on Cr(III) ions electroreduction in a deep eutectic solvent

2021 ◽  
pp. 110-116
Author(s):  
V.S. Protsenko ◽  
◽  
L.S. Bobrova ◽  
F.I. Danilov ◽  
◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Equivalent Circuit ◽  
Electrode Surface ◽  
Polarization Resistance ◽  
Electrochemical Impedance ◽  
Electrochemical Reaction ◽  
Sodium Dodecyl ◽  
Deep Eutectic Solvent ◽  
Warburg Impedance ◽  
Dodecyl Sulfate

Kinetics of Cr(III) ions electroreduction in a deep eutectic solvent (ethaline) was studied by using electrochemical impedance spectroscopy. The influence of water and sodium dodecyl sulfate on the kinetic parameters was established. The developed equivalent circuit included polarization resistance of the electrochemical reaction, constant phase element and finite Warburg impedance. The respective parameters of the accepted equivalent circuit were calculated and discussed. The obtained results indicated that the charge transfer is a rate-determining step of an electrochemical reaction occurring on a heterogeneous electrode surface. An increase in content of water in electrolytes resulted in an increase in polarization resistance, indicating the deceleration of Cr(III) ions electroreduction due to the changes in Cr(III) speciation. In addition, the introduction of extra water caused an increase in the value of a capacitive component of electrochemical impedance because of a rearrangement of the double electrical layer. The polarization resistance of Cr(III) ion discharge was increased in the presence of sodium dodecylsulfate in electrolyte due to adsorption of dodecylsulfate anion on the electrode surface. A Warburg impedance component disappeared in electrolytes containing relatively high water content, which was associated with corresponding reduction of solution viscosity and acceleration of diffusion mass transfer.

Solubility and adsorption behaviors of chlorophenols in the presence of surfactant

1997 ◽  
Vol 35 (7) ◽  
pp. 123-130 ◽  
Author(s):  
J. C. Liu ◽  
P. S. Chang
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Critical Micelle Concentration ◽  
Sodium Dodecyl ◽  
Adsorption Behaviors ◽  
Brij 35 ◽  
Important Index ◽  
Dodecyl Sulfate ◽  
Triton X

The solubility of chlorophenols as affected by surfactant was investigated. Three kinds of surfactant, sodium dodecyl sulfate, Triton X-100, and Brij 35, were utilized. The solubilization of chlorophenols by surfactant follows the order of 2,4,6-trichlorophenol > 2,4-dichlorophenol > 2,6-dichlorophenol > 2-chlorophenol; and the critical micelle concentration is an important index. The adsorption reactions of 2,4-dichlorophenol and 2,4,6- trichlorophenol onto hydrous montmorillonite in the presence of surfactant were examined. The presence of surfactant decreased the adsorption of chlorophenols significantly. The roles of hydrophobicity of chlorophenols in solubilization and adsorption behaviors are discussed.

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