Initial oxidation of silver electrode in weakly acidic sodium fluoride solutions

Safonov, V. A.; Krivenko, A. G.; Choba, M. A.

doi:10.1016/j.electacta.2008.02.003

Cited by 23 publications

(22 citation statements)

References 34 publications

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“…The higher values of specific C dl in HER region are also reported for Ag electrodes (e.g. 25-30 μF cm −2 range in HER region [16,17]), but it should be stressed that selection of the value of the specific double-layer capacitance used for the real surface area determination has no influence on the comparison of C dlm and C dlox values discussed later in the text. Therefore, presented conclusions about relation between C dlm and C dlox values are valid regardless of the selected specific C dl value.…”

Section: Methodsmentioning

confidence: 91%

“…A decrease of the interfacial capacitance of Ag upon oxidation in 0.1 M NaOH was shown also in [15]. Measurements carried out at pH of 4.5 show that the overall capacitance measured with 370 Hz decreases with the polarisation time at potentials of phase oxide formation and oxygen chemisorption [16]. At such lowfrequency values, however, the contribution from pseudocapacitances can be significant [16].…”

Section: Introductionmentioning

confidence: 99%

“…Measurements carried out at pH of 4.5 show that the overall capacitance measured with 370 Hz decreases with the polarisation time at potentials of phase oxide formation and oxygen chemisorption [16]. At such lowfrequency values, however, the contribution from pseudocapacitances can be significant [16]. An equivalent circuit containing two connected in series subcircuits, each of them composed with a parallel combination of a resistance and a capacitance (C ox or C dlox ), was used for fitting impedance spectra for Ag oxides formed in 1 M NaOH in [41] and in 1 M KOH in [47].…”

Section: Introductionmentioning

confidence: 99%

“…The double-layer capacitance of various types of Ag electrodes was studied in aqueous electrolytes at potentials where the surface is metallic [e.g. [11][12][13][14][15][16][17] and oxide-covered [8-10, 13, 15, 16, 18-20]. Silver oxidation in an alkaline electrolyte starts at ca.…”

Section: Introductionmentioning

confidence: 99%

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Impedance study on the capacitance of silver electrode oxidised in alkaline electrolyte

Grdeń

2017

J Solid State Electrochem

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Electrochemical properties of oxide-covered polycrystalline Ag electrodes were studied in a 0.1 M KOH aqueous electrolyte. The oxide layers formed by a constant potential oxidation at 420 mV vs. Hg|HgO are composed of oxygen-deficient Ag 2 O as follows from the XPS and Auger experiments. Steady-state conditions required for collection of valid impedance spectra were obtained at a potential range of 345-365 mV. The components of the equivalent circuit used for the impedance spectra analysis are analysed as a function of the Ag 2 O layer thickness. The value of the coefficient of the constant phase element (CPE) attributed to the oxide layer is Ag 2 O thickness dependent. On the other hand, the components of the CPE describing the double-layer capacitance of the oxide-covered Ag electrode are independent on the oxide thickness and their values are comparable to those obtained for the oxide-free metal. This indicates that the double-layer capacitances of oxide-covered and oxide-free Ag electrodes are similar.

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Section: Methodsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impedance study on the capacitance of silver electrode oxidised in alkaline electrolyte

Grdeń

2017

J Solid State Electrochem

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“…The number of atomic layers n in the silver deposit was estimated from the charge consumed at the silver dissolution. The control of the surface composition was performed using the LTJ method which registered potential shift ΔE LTJ induced by nanosecond laser irradiation [11,12]. The experimental set-up for LTJ is described in detail in [11] with exception that the laser used in the present study was solid-state DTL-394QT with the wavelength of 527 nm and pulse duration of 8 ns.…”

Section: Methodsmentioning

confidence: 99%

EDL structure and peculiarities of ferricyanide cyclic voltammetry for silver deposits on gold

Doronin

Manzhos

Krivenko

2015

Electrochemistry Communications

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Participation of the liver gluconeogenesis in the glibenclamide‐induced hypoglycaemia in rats

Geisler

Felisberto-Junior

Tavoni

et al. 2011

Cell Biochemistry & Function

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We previously demonstrated an increased liver gluconeogenesis (LG) during insulin-induced hypoglycaemia. Thus, an expected effect of sulphonylureas induced hypoglycaemia (SIH) could be the activation of LG. However, sulphonylureas infused directly in to the liver inhibits LG. Considering these opposite effects we investigated herein LG in rats submitted to SIH. For this purpose, 24 h fasted rats that received glibenclamide (10 mg kg(-1) ) were used (SIH group). Control group received oral saline. Glycaemia at 30, 60, 90, 120 and 150 min after oral administration of glibenclamide were evaluated. Since the lowest glycaemia was obtained 120 min after glibenclamide administration, this time was chosen to investigate LG in situ perfused livers. The gluconeogenesis from precursors that enters in this metabolic pathway before the mitochondrial step, i.e. L-alanine (5 mM), L-lactate (2 mM), pyruvate (5 mM) and L-glutamine were decreased (p < 0·05). However, the gluconeogenic activity using glycerol (2 mM), which enters in the gluconeogenesis after the mitochondrial step was maintained. Taken together, the results suggest that the inhibition of LG promoted by SIH overcome the activation of this metabolic pathway promoted by IIH and could be attributed, at least in part, to its effect on mitochondrial function.

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Initial oxidation of silver electrode in weakly acidic sodium fluoride solutions

Cited by 23 publications

References 34 publications

Impedance study on the capacitance of silver electrode oxidised in alkaline electrolyte

Impedance study on the capacitance of silver electrode oxidised in alkaline electrolyte

EDL structure and peculiarities of ferricyanide cyclic voltammetry for silver deposits on gold

Participation of the liver gluconeogenesis in the glibenclamide‐induced hypoglycaemia in rats

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