Adsorption of pyridine at the polycrystalline gold—solution interface

Stolberg, L.; Richer, Jocelyn; Lipkowski, Jacek; Irish, D. E.

doi:10.1016/0022-0728(86)87073-5

Cited by 113 publications

(88 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As shown in Fig. 5, the CV curve of the Ti/Au in the absence of the biofilm is similar to that of a gold electrode [29,30]. An anodic current peak at 0.80 V in the positive-going potential sweep and cathodic peaks with a maximum cathodic current at 0.25 V in the negative-going sweep, correspond to the formation and reduction of the oxide on the electrode, respectively.…”

Section: Electrochemical Behavior Of the Biofilm Grown On The Ti/ Au mentioning

confidence: 89%

Direct growth of biofilms on an electrode surface and its application in electrochemical biosensoring

Tian

Kanavillil

Davey

et al. 2007

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

Section: Electrochemical Behavior Of the Biofilm Grown On The Ti/ Au mentioning

confidence: 89%

Direct growth of biofilms on an electrode surface and its application in electrochemical biosensoring

Tian

Kanavillil

Davey

et al. 2007

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

“…Measurements were done as a function of potential at 10 mV s À1 scan rate and frequency of 70 Hz. Chronocoulometry (CC) was used for determining the charge density-potential curves as described in literature [21,22]. Mainly, the relative charge density Dq(E i ) was determined using potential step technique between potential E i where TBP is adsorbed and a more negative potential E f À 1.35 V where no adsorption of TBP takes place:…”

Section: Methodsmentioning

confidence: 99%

Adsorption of Tri‐n‐Butyl Phosphate (TBP) from NaClO₄ Aqueous Solution on Hg Electrode

Dogić

Krznarić

2003

Electroanalysis

View full text Add to dashboard Cite

The adsorption of TBP on Hg electrode from aqueous NaClO 4 media has been studied using differential capacity and chronocoulometric measurements. TBP adsorbs in two steps, the first corresponding to a flat and second to a perpendicular orientation. Both orientations were observed in the entire investigated potential range. The maximal measured surface concentration (G max ) of TBP reaches a value of 1.55 Â 10 À10 mol cm À2 , which corresponds to the theoretical value for densely packed molecules in perpendicular orientation. G value of the first isotherm step plateau is about 7 to 15% smaller than G max and decreases strongly at potentials more negative than À 0.9 V due to the repelling of negative charges between the electrode and the phosphate group. The standard Gibbs energy of adsorption was found to reach the value of À 34 kJ mol À1 .

show abstract

“…Assuming that the reduction of the Quat involves a two-electron process (see the following section) and that each Quat molecule occupies a minimum area of 24 Å 2 (expected to be larger than this because of the attached groups (Fig. 1)), this yields 4 × 10 14 molecules/cm 2 for a single monolayer of reduced Quat 1 (i.e., 130 µC/cm 2 for a two-electron reaction (19)). Therefore, 4 mC/cm 2 would be equivalent to at least 30 monolayers of the reduced Quat film.…”

Section: Characteristics Of Quat Film At Gc Electrodesmentioning

confidence: 99%

The reductive deposition of quaternary pyridinium corrosion inhibitor multilayers on glassy carbon electrodes

Wong¹,

Birss²

2004

Can. J. Chem.

View full text Add to dashboard Cite

Abstract:The redox behaviour of several quaternary pyridinium corrosion inhibitors ("Quats") at glassy carbon (GC) electrodes has been investigated in neutral aqueous solutions. The primary emphasis is on n-butyl-3-(N-octylcarbamyl)pyridinium bromide, one of the Quats determined to have very good corrosion inhibition properties based on parallel weight loss experiments. It is demonstrated that the reduction of the Quats, which occurs in a two-electron reaction at potentials negative of -1.0 V vs. SSCE, results in the formation of a neutral product. This forms a porous film on the electrode surface, with clusters that expand and thicken as more Quat deposits, as confirmed by atomic force microscopy. The film charge density reaches a maximum of~4 mC/cm 2 , equivalent to more than 100 monolayers of Quat, after which no further Quat can be deposited, suggesting full surface coverage by a nonconducting product. The Quat multilayer can then be redissolved at potentials positive of~-0.2 V, during its oxidation back to its original solution-soluble form.Key words: quaternarized pyridinium compounds, reductive film deposition, glassy carbon, multilayer, corrosion inhibitors, cyclic voltammetry, AFM.Résumé : Opérant dans des solutions aqueuses neutres, on a étudié le comportement redox, au niveau d'électrodes de carbone vitreux (CV), de plusieurs sels de pyridinium quaternaires, des inhibiteurs de la corrosion (« Quats »). L'accent a principalement été mis sur le bromure de n-butyl-3-(N-octylcarbamyl)pyridinium, un des quatre Quats qui, sur la base d'expériences parallèles de pertes de poids, devrait présenter de très bonnes propriétés d'inhibition de la corrosion. Il a été démontré que la réduction du Quats, une réaction à deux électrons à des potentiels négatifs de -1,0 V vs. SSCE, conduit à la formation d'un produit neutre. Tel que confirmé par une microscopie de forces atomiques, celui-ci forme un film poreux sur la surface de l'électrode, avec des agrégats qui conduisent à une expansion et un épaississement avec les dépôts additionnels de Quats. La densité de charge du film atteint un maximum dẽ 4 mC/cm 2 , équivalent à plus de 100 monocouches de Quat, après quoi il ne peut plus se déposer de Quat, ce qui suggère que la surface totale est couverte par un produit qui ne conduit pas l'électricité. La multicouche de Quat peut alors être redissoute à des potentiels positifs de~-0.2 V, durant sa réoxydation à sa forme originale soluble dans la solution.Mots clés : dérivés pyridinium quaternaires, dépôt d'un film de réduction, carbone vitreux, multicouche, inhibiteurs de corrosion, voltampérométrie cyclique, AFM.[Traduit par la Rédaction] Wong et al. 1544

show abstract

Adsorption of pyridine at the polycrystalline gold—solution interface

Cited by 113 publications

References 32 publications

Direct growth of biofilms on an electrode surface and its application in electrochemical biosensoring

Direct growth of biofilms on an electrode surface and its application in electrochemical biosensoring

Adsorption of Tri‐n‐Butyl Phosphate (TBP) from NaClO₄ Aqueous Solution on Hg Electrode

The reductive deposition of quaternary pyridinium corrosion inhibitor multilayers on glassy carbon electrodes

Contact Info

Product

Resources

About

Adsorption of pyridine at the polycrystalline gold—solution interface

Cited by 113 publications

References 32 publications

Direct growth of biofilms on an electrode surface and its application in electrochemical biosensoring

Direct growth of biofilms on an electrode surface and its application in electrochemical biosensoring

Adsorption of Tri‐n‐Butyl Phosphate (TBP) from NaClO4 Aqueous Solution on Hg Electrode

The reductive deposition of quaternary pyridinium corrosion inhibitor multilayers on glassy carbon electrodes

Contact Info

Product

Resources

About

Adsorption of Tri‐n‐Butyl Phosphate (TBP) from NaClO₄ Aqueous Solution on Hg Electrode