Adsorption of adipic acid conjugates at the Au(1 1 1) electrode|aqueous solution interface

Doneux, Thomas; Nichols, Richard J.

doi:10.1016/j.jelechem.2010.02.003

Cited by 4 publications

(5 citation statements)

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“…As seen in the spectra from the adipic acid-only sample, Cu adipate salts are evident from characteristic peaks at 1585 cm −1 (COO − asymmetric stretching), 1453 cm −1 (-CH-scissoring), 1399 cm −1 (COO − symmetric stretching) and 2950 cm −1 (-CH-stretching). The absorption peaks are similar to those previous observed for other adipate salts; 16 and the characteristic carbonyl group (C=O) stretching of the free adipic acid near 1712 cm −1 is not observed. If ethanolamine is added to the acid-PEG solution as a complexing agent, several ethanolamine-specific FTIR peaks are observed; however, there is no evidence of adipate salts.…”

Section: Resultssupporting

confidence: 85%

“…As shown in Figure 2, the diprotic carboxylic acids used in this study may exist as the free acid, monocarboxylate or bicarboxylate ions. 16 Products may form soluble species or precipitate depending on local pH. 9,12,14 Solubilities are also influenced by the formation of Cucarboxylate complexes.…”

Section: Methodsmentioning

confidence: 99%

“…z E-mail: johnflake@lsu.edu studies, exchange current densities and rest potential shifts were used to quantify kinetics including the behaviors of oxidizers or passivating agents in the solution. [12][13][14]16 In this work, we consider the chemistry and kinetics of nonaqueous carboxylic acid solutions at Cu surfaces. Here, adipic acid, maleic acid, and acetic acid were studied using Cu electrodes with 450 nm CuO x films in polyethylene glycol (PEG) solutions.…”

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confidence: 99%

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Copper Oxide Removal Activity in Nonaqueous Carboxylic Acid Solutions

Vegunta

Mai

et al. 2013

J. Electrochem. Soc.

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Flip chip joint quality and reliability are strong functions of process parameters, materials and reactions before, during, and after solder reflow. In this work, we examine CuOx removal effectiveness of nonaqueous carboxylic acid solutions using electrochemical methods at temperatures from 100°C to 180°C. Chronopotentiometry and gravimetric analysis were used to study reaction kinetics, FTIR was used to study surface chemistry, and spectrophotometry was used to quantify reactant and product solubilities. Kinetics were investigated using carboxylic acid solutions such as adipic acid or maleic acid in polyethylene glycol. Carboxylic acid-based solutions with complexing agents show CuOx removal rates are similar to hydrochloric acid solutions at temperatures above 140°C. Results suggest the combination of proton-donating complexing agents with carboxylic acids can increase CuOx removal rates by an order of magnitude over solutions without complexing agents. A model including the formation of soluble Cu2+ complexes and the regeneration of carboxylic acids is presented.

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Section: Resultssupporting

confidence: 85%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Copper Oxide Removal Activity in Nonaqueous Carboxylic Acid Solutions

Vegunta

Mai

et al. 2013

J. Electrochem. Soc.

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“…There have been several electrochemical studies of the specific adsorption of carboxylate anions on Au electrode surfaces, including formate, acetate, , benzoate, oxalate, malonate, , succinate, adipate, , and citrate . From the different adsorption configurations (bidentate, chelate, and monodentate) of the carboxylic COO group, typically, the bidentate form is used to describe the adsorbed states.…”

Section: Results and Discussionmentioning

confidence: 99%

Adsorption of Formate on Au(111) in Acid Solution: Relevance for Electro-Oxidation of Formic Acid

Kibler

Al-Shakran

2016

J. Phys. Chem. C

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The behavior of formic acid on Au(111) in perchloric acid solution at room temperature has been investigated by electrochemical methods and in situ scanning tunneling microscopy (STM) in the potential region negative to surface oxidation. Specific adsorption of formate lifts the reconstruction of the Au(111) surface. Currents for formate adsorption have been separated from those of formic acid oxidation by varying the sweep rate between 0.01 and 50 V s −1 . A 2D phase transition within the formate layer adsorbed on long-range Au(111) terraces gives rise to a characteristic voltammetric needle-peak. Parallel chains of strongly bound formate have been imaged by in situ STM. Steady-state voltammetry at different formic acid concentrations shows a characteristic bell-shaped current maximum and a pronounced current jump related with the adlayer phase transition at more positive potentials. Oxidation kinetics of formic acid strongly depends on formate adsorption, which is determined by the electrode potential, the pH, and the formic acid concentration. Various adsorbates (bidentate and monodentate formate and/or carboxylate) with entirely different reactivity are supposed to play a role in the formic acid oxidation mechanism.

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“…It can be seen in Figure 9 that in the presence of the corrosion inhibitors, a broad capacitance minimum is observed at potentials cathodic to the corrosion potential (refer to Figure 2). This potential-independent capacitance can be attributed to an ordered adlayer of molecules [40,41], which have a fixed orientation not changing with applied potential [42,43]. In corrosion inhibition studies, this behaviour is taken as a sign of effective inhibition [44].…”

Section: Deis Measurementsmentioning

confidence: 99%

Corrosion inhibition of carbon steel in diethanolamine–H₂O–CO₂ system by some organic sulphur compounds

Kakaei¹,

Neshati²

2019

Corrosion Engineering, Science and Technology

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This paper presents an electrochemical investigation of the corrosion inhibition of carbon steel in diethanolamine-water-carbon dioxide systems by four sulphur-containing organic compounds: 2mercaptobenzothiazole, 2-mercaptobenzimidazole, diethyl thiourea and dimethyl sulfoxide which were found to be effective in the same order as introduced. Potentiodynamic polarisation revealed their cathodic mechanism of action. The adsorption-desorption behaviour of the inhibitors was studied using capacitance-potential and the constant phase element exponent-potential profiles obtained from dynamic electrochemical impedance spectroscopy measurements. Furthermore, quantum chemical calculations at the density functional theory level were performed to help in the analysis of the experimental results. The inhibition power of mercaptobenzazoles was found regardless to whether they were dissociated or not. The double layer capacitance values showed a rather consistent increasing trend with some theoretical parameters namely, the fraction of transferred electrons, the highest occupied molecular orbital energy level, and the permanent dipole moments of the inhibitor molecules.

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Adsorption of adipic acid conjugates at the Au(1 1 1) electrode|aqueous solution interface

Cited by 4 publications

References 38 publications

Copper Oxide Removal Activity in Nonaqueous Carboxylic Acid Solutions

Copper Oxide Removal Activity in Nonaqueous Carboxylic Acid Solutions

Adsorption of Formate on Au(111) in Acid Solution: Relevance for Electro-Oxidation of Formic Acid

Corrosion inhibition of carbon steel in diethanolamine–H₂O–CO₂ system by some organic sulphur compounds

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Adsorption of adipic acid conjugates at the Au(1 1 1) electrode|aqueous solution interface

Cited by 4 publications

References 38 publications

Copper Oxide Removal Activity in Nonaqueous Carboxylic Acid Solutions

Copper Oxide Removal Activity in Nonaqueous Carboxylic Acid Solutions

Adsorption of Formate on Au(111) in Acid Solution: Relevance for Electro-Oxidation of Formic Acid

Corrosion inhibition of carbon steel in diethanolamine–H2O–CO2 system by some organic sulphur compounds

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Corrosion inhibition of carbon steel in diethanolamine–H₂O–CO₂ system by some organic sulphur compounds