Time effects at the adamantanol-1 adsorption on silver electrode: Comparison of impedance data with results obtained by the method of potential shifts induced by laser heating

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• 作者：V.A. Safonov ; M.A. Choba ; A.G. Krivenko ; R.A. Manzhos ; E.V. Stenina ; L.N. Sviridova
• 关键词：Ag electrode ; Renewable surface ; Adamantanol-1 ; Differential capacitance ; Potential shifts induced by laser heating ; Electric double layer ; Oxygen chemisorption
• 刊名：Electrochimica Acta
• 出版年：2009
• 出版时间：1 November 2009
• 年：2009
• 卷：54
• 期：26
• 页码：6499-6507
• 全文大小：849 K

文摘

Using the method of potential shifts induced by laser heating and electrochemical (impedance and voltammetric) measurements on electrodes with mechanically renewable surfaces, the adsorption behavior of adamantanol-1 (AdOH) on the Ag electrode interface with surface-inactive electrolyte (NaF) solutions is studied. It is shown that the kinetics of AdOH adsorption in the potential range of ideal polarizability (near the zero-charge potential E_σ=0) is described in terms of the mechanism of a quasi-chemical reaction Ag(H₂O)_ads + AdOH = Ag(AdOH)_ads + H₂O on the energy-uniform metal surface. A phenomenological model that allows one to produce a self-consistent description of time effects observed on a renewable Ag electrode in the potential range of its primary oxidation in solutions containing AdOH was assumed and analyzed.