Square-Wave Voltammetry

Lovrić, Milivoj

doi:10.1007/978-3-662-04757-6_6

Cited by 15 publications

(25 citation statements)

References 163 publications

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“…Peak currents usually become higher when frequency increases [29,30] and the present type of behavior is unusual. In linear scan voltammetry, however, similar effect, i.e., decreasing of peak height at increasing scan rate has already been observed.…”

Section: Current-frequency Relationshipmentioning

confidence: 99%

The Influence of Rhodium(+3) onVoltammetry of Selenium(+4) in Perchloric Acid

Zelić

2005

Electroanalysis

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In comparison with previously described voltammetric behavior of selenium( þ 4) -rhodium( þ 3) system in sulfuric or hydrochloric acid, results obtained in 0.1 mol/L perchloric acid differ significantly. The difference includes: a) number of signals and conditions under which they appear b) current-concentration plots with nonzero intercepts c) unusual dependence of the peak characteristics on the speed of the applied technique and d) much more pronounced peak height enhancement. In square wave voltammetry the signal at À 0.75 V can be even 230 times higher with rhodium( þ 3) than without it. Most probably the peak at À 1.15 V corresponds to the catalytic reduction of hydrogen ions whereas the signal at À 0.75 V is additionally influenced by some other processes. Results are highly dependent on the form of rhodium( þ 3) in the initial solution and qualitatively similar to those previously obtained with sulfur compounds and dissolved metal catalysts.

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Section: Current-frequency Relationshipmentioning

confidence: 99%

The Influence of Rhodium(+3) onVoltammetry of Selenium(+4) in Perchloric Acid

Zelić

2005

Electroanalysis

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“…The latter technique is of particular interest because of its high sensitivity and immunity to capacitive effects. [34] In an attempt to correlate voltammetric and spectroscopic data, the electrocatalytic effect of chromium-doped materials on the oxidation of hexacyanoferrate(ii) ions and 1,4-dihydrobenzoquinone in aqueous solution has been studied. Apart from its applications in chemical sensing and electrosynthesis, such catalytic processes can be used as amplifiers of the electrochemical properties of the catalytic centres, as illustrated by prior data on vanadium-doped zirconias and cobalt-containing cordierite materials.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of High Oxidation States of Chromium(IV and V) in Chromium‐Doped Cassiterite and Tin‐Sphene Ceramic Pigmenting Systems

et al. 2006

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Solid-state electrochemistry is applied to detect the presence of chromium centres with high oxidation states in chromiumdoped cassiterite and tin-sphene ceramic pigmenting systems. Voltammetric data indicate that Cr V and Cr IV centres with different coordinative arrangements exist in the studied materials, and yield proton-assisted reduction processes at +0.95, +0.42 AgCl/Ag in contact with 0.50 M H 2 SO 4 . Electro-

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“…More specifically, for repulsive forces the QRM shifts towards higher critical frequencies, whereas the shift is opposite for attractive forces. We recall that the QRM is a parabolic dependence of the dimensionless net peak current « p (or frequency normalized real net peak current, I p f −0.5 ) on the logarithm of the frequency; its origin, physical meaning, and application for kinetic measurements have been elaborated in detail in previous studies [24,25].…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…E sw amplitude) are superimposed. The current is measured at the potential of the pulse, but plotted versus the potential of the staircase ramp [24,25]. Presenting the data in this way is justified from an analytical point of view, but has some drawbacks in the context of electrode kinetic measurements.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…Recently, an attempt was made to develop a phenomenological theoretical background to rationalize some of possible electrode mechanisms [23] under conditions of square-wave voltammetry (SWV) [24,25]. In the present communication we apply the recent theory [23] to characterize the anodic stripping electrode mechanisms of Pb(II), Cd(II) and Zn(II) from mechanistic and kinetic point at both BiFEs and SbFEs, while the mechanism of Pb(II) was studied at bare GCE as well.…”

Section: Introductionmentioning

confidence: 99%

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Mechanisms and kinetics of electrode processes at bismuth and antimony film and bare glassy carbon surfaces under square-wave anodic stripping voltammetry conditions

Mirčeski

Sebez

Jancovska

et al. 2013

Electrochimica Acta

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a b s t r a c tMechanism and kinetics of anodic stripping electrode processes of Zn(II), Cd(II) and Pb(II) at bismuth (BiFE) and antimony (SbFE) film as well as bare glassy carbon (GCE) electrodes have been studied with respect to our recent published theoretical considerations developed for square-wave voltammetry (SWV). Mechanistic aspects of electrode reactions have been elucidated by a qualitative comparison of simulated and experimental data for three different electrode reaction mechanisms, i.e. simple anodic stripping mechanism, anodic stripping mechanism coupled with adsorption of metal analyte ions, and mechanism affected by interactions within the particles of the metal deposit on the electrode surface. The electrode kinetics has been estimated by the method of quasireversible maximum and by analyzing the peak potential separation between forward and backward SW components, under variation of the SW amplitude. Electrode mechanisms and kinetics are different at bismuth compared to antimony film electrodes. The electrode reactions of Pb(II) and Cd(II) at BiFE involve adsorption phenomena, while electrode processes of all three analytes are free of adsorption at SbFE. At BiFE, the electron transfer standard rate constants of all three analytes are quite comparable, ranging within the interval from 1 to 3 cm s −1 . At SbFE the electrode kinetics of Cd(II) and Pb(II) are almost the same, while the electrode reaction of Zn(II) is significantly slower. Our results showed that the kinetics of all examined electrode reactions are slower at SbFE as compared to those observed at BiFE.

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Square-Wave Voltammetry

Cited by 15 publications

References 163 publications

The Influence of Rhodium(+3) onVoltammetry of Selenium(+4) in Perchloric Acid

The Influence of Rhodium(+3) onVoltammetry of Selenium(+4) in Perchloric Acid

Electrochemical Detection of High Oxidation States of Chromium(IV and V) in Chromium‐Doped Cassiterite and Tin‐Sphene Ceramic Pigmenting Systems

Mechanisms and kinetics of electrode processes at bismuth and antimony film and bare glassy carbon surfaces under square-wave anodic stripping voltammetry conditions

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