Anodic Formation of Ag¹ Oxide on Ag-Au Alloys

Grushevskaya, Svetlana; Kudryashov, Dmitrii; Vvedenskii, Alexander
November 2008
Croatica Chemica Acta;Nov2008, Vol. 81 Issue 3, p467
Academic Journal
The kinetics of anodic dissolution of silver and Ag-Au alloys (xAu = 0.1-30 %) in aqueous alkaline solution under the conditions of AgI oxide formation has been examined. Using the techniques of cyclic voltammetry and chronoamperometry it has been established that Ag2O anodic formation and cathodic reduction on silver and on alloys of all compositions under review are controlled by Ag+ cation migration in the oxide layer. The oxide film consists of a thin inner layer (apparently AgOH) and of a thicker outer layer Ag2O. These layers slightly differ in specific electro-conductivity. Using the photopotential measurements it has been shown that Ag2O oxide is an n-type semiconductor with an excess of silver atoms. The AgI oxide layer formed on monocrystalline Ag(111) is more stoichiometric than the layer formed on polycrystalline Ag.


Related Articles

  • Electrocyclization of Semicarbazone; A Novel Route of Green Synthesis of 2,5-Disubstituted-1,3,4-Oxadiazoles. Lotfi, Benmekhbi; Mustafa, Bencharif; Leila, Bencharif; Salima, Mosbah // International Journal of Electrochemical Science;Jun2011, Vol. 6, p1991 

    The anodic oxidation of a number of arylsemicarbazides derivatives (I) has been examined in acetonitril containing lithium perchlorate (LiClO4) as a supporting electrolyte (20g/l). The reaction was sensitive to the amount of electricity passed through the cell, so the electrode potential was...

  • Electrochemical polymerization of N, N′-bis(3-methoxysalicylidene)-1,3-propylenediamine. Golyakov, A.; Borisov, A.; Shagisultanova, G.; Shpilev, A. // Russian Journal of General Chemistry;Sep2011, Vol. 81 Issue 9, p1867 

    The electrochemical oxidation of N,N′-bis(3-methoxysalicylidene)-1,3-propylenediamine leads to the formation of conducting polymer on the electrode surface. The decisive role of phenol oxygen in the formation of the polymeric forms of azomethine bases was elucidated. Optimal conditions for...

  • Mechanism of di(methyl)ether (DME) electrooxidation at platinum electrodes in acid medium. Kéranguéven, G.; Coutanceau, C.; Sibert, E.; Hahn, F.; Léger, J-; Lamy, C. // Journal of Applied Electrochemistry;Apr2006, Vol. 36 Issue 4, p441 

    The electrooxidation of DME was studied at a bulk platinum electrode. It was shown that the DME adsorption was a slow step in the overall oxidation reaction. The DME adsorption is potential dependent in the hydrogen region of platinum and independent in the double layer region. From low...

  • Determination of Dopamine in Presence of Uric Acid at Poly (Eriochrome Black T) Film Modified Graphite Pencil Electrode. Chandra, Umesh; Swamy, Bahaddurghatta Eshwaraswamy Kumara; Gilbert, Ongera; Reddy, Sathish; Sherigara, Bailire Sheena // American Journal of Analytical Chemistry;May2011, Vol. 2 Issue 2, p262 

    A simple commercial graphite pencil electrode was used to investigate the electrochemical oxidation of dopamine. The electropolymerised film of eriochrome black T was prepared on the surface of graphite pencil electrode by using cyclic voltammetry technique. The prepared electrode exhibits an...

  • Electro-oxidation of rutin in the presence of p-toluenesulfinic acid. Timbola, Ana Karina; Souza, C. D.; Soldi, C.; Pizzolatti, M. G.; Spinelli, A. // Journal of Applied Electrochemistry;May2007, Vol. 37 Issue 5, p617 

    We report the electrochemical oxidation of rutin in acetonitrile-sodium phosphate (4:1 (v/v); pH 2.0) in the presence of p-toluenesulfinic acid. Cyclic voltammetry and controlled potential electrolysis were used to study rutin electro-oxidation and to prepare the sulfone derivatives....

  • Determination of lead and cadmium using a polycyclodextrin-modified carbon paste electrode with anodic stripping voltammetry. Roa, Gabriela; Ramírez-Silva, M. T.; Romero-Romo, M. A.; Galicia, Laura // Analytical & Bioanalytical Chemistry;Oct2003, Vol. 377 Issue 4, p763 

    This work reports the use of α and β-cyclodextrin-modified carbon paste electrodes (CPEα-CD and CPEβ-CD) to determine simultaneously Pb(II) and Cd(II) by means of the electrochemical technique known as anodic stripping voltammetry (ASV). Both modified electrodes displayed good...

  • Electrochemical oxidation process for water condensates recycling in a shuttle orbiter. Rutigliano, L.; Fino, D.; Saracco, G.; Specchia, V.; Spinelli, P.; Grizzaffi, L. // Journal of Applied Electrochemistry;Nov2009, Vol. 39 Issue 11, p2239 

    A pilot plant has been built for the regeneration of humidity condensates during shuttle missions. The plant is an automated experimental apparatus which includes an electrochemical cell, two reservoirs and a control system to maintain the temperature within a chosen range, so that the ionic...

  • Morphological Effect of Pd Catalyst on Ethanol Electro-Oxidation Reaction. Cerritos, Raúl Carrera; Guerra-Balcázar, Minerva; Ramírez, Rosalba Fuentes; Ledesma-García, Janet; Arriaga, Luis Gerardo // Materials (1996-1944);Sep2012, Vol. 5 Issue 9, p1686 

    In the present study, three different structures with preferentially exposed crystal faces were supported on commercial carbon black by the polyol method (nanoparticles (NP/C), nanobars (NB/C) and nanorods (NR/C)). The electrocatalysts were characterized by XRD, TEM, TGA and cyclic voltammetry...

  • Selective electrochemical reactions of an alumina hydrate crystallization inhibitor. Bouchard, Nicolas-Alexandre; Brisach-Wittmeyer, Anne; Breault, Raymond; Ménard, Hugues // Journal of Applied Electrochemistry;May2007, Vol. 37 Issue 5, p625 

    Selective reactions of catechol have been studied in regard to its inhibition properties towards alumina hydrate crystallization. Electrochemical reactions of the inhibitor leading to products without inhibition behaviour have been obtained using different conditions. First, a pure sodium...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics