Some unusual features of the electrochemistry of silver in aqueous base

Nagle, Lorraine C.; Ahern, Andrea J.; Burke, Declan

doi:10.1007/s100080100233

Cited by 24 publications

(27 citation statements)

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“…EXAFS is caused by the scattering of the excited photoelectrons from neighbouring atoms and contains quantitative information on the atomic short range structure around the absorbing atom such as Ł Correspondence to: Dirk Lützenkirchen-Hecht, Fachbereich C, Experimentalphysik, Bergische Universität Wuppertal, Gauß-Str. 20, 42097 Wuppertal, Germany. E-mail: dirklh@uni-wuppertal.de bond distances, coordination numbers and Debye-Waller factors.…”

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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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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“…The anodic peak “A” is attributed to Ag to Ag + and “I” contributed to oxidation of characteristic Ag nanostructures. On the other hand, the cathodic peaks “C” and “II” were belongs to the reduction of β oxides formed especially on nanostructures ; and peak “II” was ascribed to characteristic of a reduction process by nanostructures. The observed results are well comparable with the Ag nanoparticles decorated ITO electrodes .…”

Section: Resultsmentioning

confidence: 99%

“…Usually α-oxide is associated with AgOH, Ag 2 O and AgO. β-oxide were associated with different hydrous composition, Ag(OH) n (H 2 O) m [29]. It is speculated the hydroxide formation could be used for electrocatalytical reactions like other metal nanoparticles such as Cobalt [17], Nickel [31], and Au 0 -Ag 100 [32] towards biomolecules detection.…”

Section: Electrochemical Non-enzymatic Detection Of Pamentioning

confidence: 99%

A Non‐enzymatic Disposable Electrochemical Sensor for Pyruvic Acid

Swetha

Prasad

2020

Electroanalysis

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Pyruvic acid (PA), plays an important role in metabolic pathway of living organism, and found use in health care, food, drug and agro-chemical industries. Herein, we report development of disposable silver nanoparticles decorated reduced graphene oxide (AgÀ rGO) nanocomposite electrodes for non-enzymatic detection of PA.The AgÀ rGO endowed enhanced electrochemical active area, and exhibited excellent electrochemical activity towards PA with well-defined oxidation peak at 400 mV. The sensor exhibited a linear range of 0.025-1.43 μM for PA with detection limit of 0.5 nM. The validation of developed PA sensor was performed with onion juice and, reason behind electrode fouling affect on electrochemical oxidation of PA also investigated.

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“…5. Silver electrode gives the typical cyclic voltammogram of a polycrystalline silver electrode [33][34][35]. seen in the figure.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

“…Its photochemical [30][31][32] and electrochemical [33][34][35] properties have been widely studied up to date. The electrochemical behavior of silver cations in the zeolitic or layered structure was found to be highly dependent on the ion exchange site or site-to-site conversion [36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%