Adsorption of Organic Compounds on Electrodes

Дамаскин, Б. Б.; Петрий, О. А.; Батраков, В. В.

doi:10.1007/978-1-4615-8192-5

Cited by 349 publications

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“…3 has much to do with that for the adsorption on electrodes where the adsorption layer results from 2D condensation. In this case, the isotherms run virtually upright, just as we observed experimentally [3].…”

Section: Resultssupporting

confidence: 79%

“…As shown in [3], a steeply ascending isotherm like that for the VNKh-L-408 inhibitor (and VNKh-L-21) is observed when repulsion in the adsorption layer -for chemisorption and physical adsorption, this is described by the Temkin and Frumkin equations, respectively -changes to attraction (i.e., positive attractive interaction). This is the case with colloid solutions of inhibitors.…”

Section: Resultsmentioning

confidence: 89%

“…doi: 10.17675/2305August 10, -6894-2013 Experimental Electrochemical studies on the adsorption of inhibitors on steel were carried out in a mixed electrolyte (30 mg/dm 3 NaCl + 50 mg/dm 3 Na 2 SO 4 ), which is believed to simulate the electrolyte that is condensed on metal surfaces under atmospheric corrosion conditions at 100% relative humidity [1,2]. The adsorption was studied by measuring the differential capacitance of the double electrical layer (DEL) with an R-5021 AC bridge [3].Measurements were carried out with parallel connection of a capacitor and a resistor. The alternating current frequency was 1 kHz.…”

mentioning

confidence: 99%

“…Therefore we calculated  for the potential  = -0.7 V that is close to the free corrosion potential in this medium. The concentrations of the inhibitors were varied from 10 -5 to 10 -1 mol/dm 3 . The surface coverage was calculated by the formula:…”

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confidence: 99%

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Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals. V. Study of the adsorption of inhibitors on steel from an aqueous electrolyte solution

Altsybeeva¹,

Burlov²,

Fedorova³

et al. 2013

Int. J. Corros. Scale Inhib.

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Adsorption of ten Mannich and Schiff bases on steel from a mixed electrolyte solution (30 mg/dm 3 NaCl + 50 mg/dm 3 Na 2 SO 4 ) was studied. The adsorption isotherms show linear segments in the medium coverage range, which may be equally attributed to both the Frumkin and Temkin isotherms. Unfortunately, experimental data are insufficient to distinguish among them. It was demonstrated that the mechanism of action of the inhibitors in vapor phase differs from that in a model electrolyte solution and that testing of volatile inhibitors in electrolytes provides no accurate pattern of corrosion inhibition in the vapor phase. The VNKh-L-21 and VNKh-L-408 inhibitors form nanoclusters that merge on the surface into a polymolecular adsorption layer. Key words: Schiff and Mannich bases, adsorption, mixed electrolyte, electrode surface coverage, blocking effect, Frumkin and Temkin isotherms, nanoclusters.Received: August 10, 2013August 10, . doi: 10.17675/2305August 10, -6894-2013 Experimental Electrochemical studies on the adsorption of inhibitors on steel were carried out in a mixed electrolyte (30 mg/dm 3 NaCl + 50 mg/dm 3 Na 2 SO 4 ), which is believed to simulate the electrolyte that is condensed on metal surfaces under atmospheric corrosion conditions at 100% relative humidity [1,2]. The adsorption was studied by measuring the differential capacitance of the double electrical layer (DEL) with an R-5021 AC bridge [3].Measurements were carried out with parallel connection of a capacitor and a resistor. The alternating current frequency was 1 kHz. Since Faraday processes and pseudocapacitance cannot be eliminated completely, one should keep in mind that the measured capacitances give only a rough measure of the DEL capacitance and therefore the calculation will provide some affective surface coverage of an electrode with an inhibitor.A rod shaped St3 electrode with a surface area of 1 cm 2 was prepared according to a conventional procedure for electrochemical studies. It was found during the preparation and optimization of the experimental conditions that the most reproducible results were

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 89%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals. V. Study of the adsorption of inhibitors on steel from an aqueous electrolyte solution

Altsybeeva¹,

Burlov²,

Fedorova³

et al. 2013

Int. J. Corros. Scale Inhib.

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“…The determination of the nature of adsorbed molecules on metal surfaces is a complicated task even for molecules adsorbed from the gas phase (9). The problems become even more troublesome when one studies these phenomena in elec trolyte solutions.…”

Section: B Oxidation Of Adsorbed Organic Moleculesmentioning

confidence: 99%

Triple pulse amperometry: a method of detection of carbohydrates and alcohols for liquid chromatography

Hughes

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Effect of Surfactants and Related Biological Active Substances on the O2/H2O2 Voltammetry and Its Utilization for Determination of the Total Surfactant Content

Novotný

Navrátil

1998

Electroanalysis

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The effect of surfactants on the second voltammetric reduction peak of air oxygen dissolved in aqueous electrolyte solutions is described. Sodium dodecylbenzenesulfonate (DBSNa) was used as a model surfactant in the concentration range 9 × 10 ¹8 -9 × 10 ¹7 mol L ¹1 . With increasing DBSNa concentration the second oxygen reduction peak increases and shifts to negative potentials. Measurements were carried out in pure 0.1 mol L ¹1 KCl as well as in freshly collected samples of seawater. By means of calibration plots obtained with DBSNa we could determine the total surfactant concentration in seawater, i.e., the voltammetric surfactant background signal. Expressed in equivalent concentration of DBSNa this background amounted to 3 × 10 ¹7 mol L ¹1 .

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Adsorption of Organic Compounds on Electrodes

Cited by 349 publications

References 0 publications

Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals. V. Study of the adsorption of inhibitors on steel from an aqueous electrolyte solution

Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals. V. Study of the adsorption of inhibitors on steel from an aqueous electrolyte solution

Triple pulse amperometry: a method of detection of carbohydrates and alcohols for liquid chromatography

Effect of Surfactants and Related Biological Active Substances on the O2/H2O2 Voltammetry and Its Utilization for Determination of the Total Surfactant Content

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