Oxygen electrosorption on Ag(111) and Ag(110) electrodes in NaOH solution

Droog, J

doi:10.1016/0368-1874(80)80409-6

Cited by 9 publications

(10 citation statements)

References 5 publications

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“…The size and appearance of the Al peak is known to depend on the crystal face, with the Ag{llO) face being more reactive than the Ag( 111) [34]. Therefore, restructuring of the electrode surface occurs after the reduction of oxide from surface oxide crystals at a potential around 200 m V vs. Ag/ AgCl 4 M KCI.…”

Section: Potentialmentioning

confidence: 99%

Nucleation of Silver (I) Oxide Investigated by Spectroscopic Ellipsometry

Mayer

Müller

1988

J. Electrochem. Soc.

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The early stages of the anodic oxidation of Ag(111) in 1MKOH during the application of potential steps, current steps, and potential sweeps have been investigated by spectroscopic ellipsometry. Film thicknesses and surface coverages have been derived from the measurements by use of a dual‐layer optical model. The results are supported by SEM observations on selected specimens. Oxide crystals are found to nucleate from a previously formed homogeneous oxide layer. A decrease in number density of crystals of several orders of magnitude during film growth has been found and is attributed to the growth of larger crystals at the expense of smaller ones.

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Section: Potentialmentioning

confidence: 99%

Nucleation of Silver (I) Oxide Investigated by Spectroscopic Ellipsometry

Mayer

Müller

1988

J. Electrochem. Soc.

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“…Refs 1 and 2). During the initial stages of the anodic oxidation, an AgOH monolayer is formed, 3,4 followed by a thin primary Ag(I) oxide overlayer. Its thickness grows with increasing electrode potential.…”

Section: Introductionmentioning

confidence: 99%

The anodic oxidation of silver in 1 M NaOH: electrochemistry, ex situ XPS and in situ X‐ray absorption spectroscopy

Lützenkirchen‐Hecht¹,

Strehblow²

2006

Surface & Interface Analysis

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We have investigated the electrochemical formation of oxide layers on silver in 1 M NaOH (pH 13.8) using a combination of electrochemical techniques, X-ray photoelectron spectroscopy (XPS) and surface sensitive grazing incidence X-ray absorption spectroscopy (XAS). While the XPS experiments were performed after the removal of the samples from the electrolyte and transfer into an ultra-high vacuum (UHV) system under inert conditions, the XAS experiments were performed in situ and under full potential control. The application of these techniques leads to a detailed, consistent picture of the anodic oxide layer formation process on silver. All the applied techniques proved that the anodic oxidation starts at potentials lower than the corresponding Nernst potential. Extended X-ray absorption fine structure (EXAFS) investigations suggest that the underpotential Ag + oxide layer of some few nanometres thickness has a rather disordered structure. Time resolved XPS and EXAFS experiments have shown that the growth of these disordered layers is diffusion controlled, i.e. the thickness increases with the square root of the oxidation time. For moderately higher potentials, i.e. slightly above the Nernst equilibrium potential, the thickness of the silver(I) oxide layer increases rapidly with potential and the structure is very similar to that of crystalline Ag 2 O.

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“…Pure silver is also investigated widely from the electrochemical point of view. [27][28][29][30][31][32][33][34][35][36][37][38][39][40] The presence of adsorbed hydroxyl ions on both copper and silver electrode surface in alkaline solutions, even in so-called doublelayer region, was proved by in situ scanning electron microscopy [10,12] and other surface analytical methods. Thus, the adsorption of hydroxyl ions is considered to be the first reaction step that can take place during the anodic polarization of CuAg4 at.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior of Sintered CuAg4 at. pct Alloy

Rajčić-Vujasinović

Nestorovic

Grekulović

et al. 2010

Metall Mater Trans B

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MIRJANA RAJČ IĆ -VUJASINOVIĆ , SVETLANA NESTOROVIĆ , VESNA GREKULOVIĆ , IVANA MARKOVIĆ , and ZORAN STEVIĆ The electrochemical characteristics of sintered CuAg4 at. pct alloy in different stages of synthesis and thermomechanical treatment were examined by cyclic voltammetry in a NaOH medium. On the voltammograms recorded at the sintered alloy, six current waves can be noticed at the anodic part, and six corresponding current waves are observed at the cathodic part. A possible electrochemical reaction is attributed to each wave. The effect of the potential reversing limit was used to distinguish the correlation between the anodic and cathodic peaks. After the deformation with 60 pct deformation degree, the alloy becomes more corrosion resistant, whereas the corrosion mechanism remains the same as before mechanical treatment. Subsequent anneal of the deformed alloy at 533 K (260°C) for 150 minutes leads to the hardening effect. At the same time, the alloy remains corrosion stable, and some of the current waves present at the other voltammograms are hardly noticeable here. Also, we propose our own model of oxide layer formation on the surface of a Cu-Ag alloy.

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Oxygen electrosorption on Ag(111) and Ag(110) electrodes in NaOH solution

Cited by 9 publications

References 5 publications

Nucleation of Silver (I) Oxide Investigated by Spectroscopic Ellipsometry

Nucleation of Silver (I) Oxide Investigated by Spectroscopic Ellipsometry

The anodic oxidation of silver in 1 M NaOH: electrochemistry, ex situ XPS and in situ X‐ray absorption spectroscopy

Electrochemical Behavior of Sintered CuAg4 at. pct Alloy

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