A modification of the last step of surface preparation for gold and silver single crystal faces

Hamelin, A.; Doubova, L.; Wagner, D.; Schirmer, Heike

doi:10.1016/0022-0728(87)88010-5

Cited by 45 publications

(11 citation statements)

References 7 publications

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“…The cleanliness of the Au(111) surface is particularly evident by cyclic voltammetry in 0.01 M HClO 4 . The gold metal interface in aqueous solutions has been observed thoroughly by Hamelin − and others. −, However, there are few quantitative studies of the relationship between surface defects and cyclic voltammetry in 0.01 M HClO 4 , in the sense that any defects are noticeable as distortions in the cyclic voltammogram, but it is often impossible to identify with certainty the etiology. The oxidation and reduction peaks are distorted, and the double-layer region is altered when the electrode is of poor quality.…”

Section: Resultsmentioning

confidence: 99%

Impedance Spectroscopy of Self-Assembled Monolayers on Au(111): Evidence for Complex Double-Layer Structure in Aqueous NaClO₄ at the Potential of Zero Charge

and

Fawcett

Ulman³

1997

J. Phys. Chem. B

191

128

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The impedance of a Au(111) electrode modified by three different self-assembled monolayers has been studied over a wide frequency range in aqueous NaClO4 solutions. The impedance characteristics of the bare electrode are compared with those of the same electrode modified with decanethiol, ω-hydroxydecanethiol, and 4‘-hydroxy-4-mercaptobiphenyl. In the case of the decanethiol system the interfacial impedance can be represented as a capacitor due to the self-assembled monolayer in series with the solution resistance. However, for the latter two systems, the impedance behavior is more complex with a high resistance in the monolayer parallel to the expected capacitance. This behavior is quite different than that discussed to date in the literature and assumed in the interpretation of voltammetric data for modified electrodes. The parameters for these systems are reported here as a function of electrolyte concentration at the point of zero charge on the bare Au(111). The consequences of the present observations are discussed with respect to the phenomena observed for these systems.

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Section: Resultsmentioning

confidence: 99%

Impedance Spectroscopy of Self-Assembled Monolayers on Au(111): Evidence for Complex Double-Layer Structure in Aqueous NaClO₄ at the Potential of Zero Charge

and

Fawcett

Ulman³

1997

J. Phys. Chem. B

191

128

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“…A major breakthrough was achieved when Clavilier et al demonstrated that high‐quality single‐crystal platinum surfaces could be prepared simply with a Bunsen burner 38, 39. This so‐called flame annealing, which was subsequently shown to work also for gold and silver,40 consisted of heating the crystal in the flame of a Bunsen burner for several seconds or minutes before it was quenched in ultrapure water and transferred to the electrochemical cell with a droplet of water adhering to the polished surface. The latter was crucial in protecting the surface from airborne contaminants.…”

Section: The Experimental Basis Of An Electrochemical Surface Sciencementioning

confidence: 99%

Electrochemical Surface Science

Kolb

2001

Angew. Chem. Int. Ed.

281

111

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The last 30 years have seen remarkable changes in interfacial electrochemistry, particularly in the kind of questions that were addressed in electrochemical studies. Ever since classical surface science, traditionally performed under ultrahigh vacuum conditions, has succeeded in describing surfaces and surface reactions on a molecular level, electrochemists longed for a microscopic understanding of the solid/electrolyte interface and, at the same time, searched widely for new experimental ways to reach that goal. Herein, studies are described concerning the structure and the dynamics of bare and adsorbate‐covered electrode surfaces and of metal deposition as a simple, yet important, electrochemical process. In all these cases, the scanning tunneling microscope plays a pivotal role emphasizing the surface‐science approach to the problems.

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“…The Au 111 electrode (a = 0.19 cm 2 ) has been prepared by flame annealing and cooling in argon according to the rules given by Hamelin [33].…”

Section: Electrodesmentioning

confidence: 99%

The Under Potential Deposition of Cu on Au (111) in Nonaqueous Acetonitrile

Pekmez

Avci

Baumgärtel

et al. 2012

Zeitschrift Für Physikalische Chemie

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The underpotential deposition (UPD) of Copper on Au(111) in nonaqueous acetonitrile/perchlorate electrolyte has been investigated. The deposition mechanism is thereby strongly influenced by coadsorbed acetonitrile molecules and the stability of the solvation shell around the Cu(I) ions. The UPD mechanism obeys a two step mechanism even in presence of only none specifically adsorbing perchlorate ions. Thereby the first sub monolayer of copper is stabilized by coadsorbed acetonitrile molecules. However already 5% vol water content changes the structure within the double layer and consequently degrades the copper sub monolayer. At about 20% vol water content the Cu(I) ion/solvent complex is still stable. The reduction of Cu(I) ions from this complex is much faster compared to the reduction from the respective Cu(II) water complex.

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A modification of the last step of surface preparation for gold and silver single crystal faces

Cited by 45 publications

References 7 publications

Impedance Spectroscopy of Self-Assembled Monolayers on Au(111): Evidence for Complex Double-Layer Structure in Aqueous NaClO₄ at the Potential of Zero Charge

Impedance Spectroscopy of Self-Assembled Monolayers on Au(111): Evidence for Complex Double-Layer Structure in Aqueous NaClO₄ at the Potential of Zero Charge

Electrochemical Surface Science

The Under Potential Deposition of Cu on Au (111) in Nonaqueous Acetonitrile

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A modification of the last step of surface preparation for gold and silver single crystal faces

Cited by 45 publications

References 7 publications

Impedance Spectroscopy of Self-Assembled Monolayers on Au(111): Evidence for Complex Double-Layer Structure in Aqueous NaClO4 at the Potential of Zero Charge

Impedance Spectroscopy of Self-Assembled Monolayers on Au(111): Evidence for Complex Double-Layer Structure in Aqueous NaClO4 at the Potential of Zero Charge

Electrochemical Surface Science

The Under Potential Deposition of Cu on Au (111) in Nonaqueous Acetonitrile

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Product

Resources

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Impedance Spectroscopy of Self-Assembled Monolayers on Au(111): Evidence for Complex Double-Layer Structure in Aqueous NaClO₄ at the Potential of Zero Charge

Impedance Spectroscopy of Self-Assembled Monolayers on Au(111): Evidence for Complex Double-Layer Structure in Aqueous NaClO₄ at the Potential of Zero Charge