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Showing papers on "Cyclic voltammetry published in 1983"


Journal ArticleDOI
TL;DR: In this paper, the procedural steps and their theoretical implications for a laboratory in cyclic voltammetry were described and discussed. But they did not specify the theoretical implications of these procedural steps.
Abstract: This article details the procedural steps and their theoretical implications for a laboratory in cyclic voltammetry.

376 citations


Journal ArticleDOI
TL;DR: In this paper, a selective permeability of polymers derived by electrochemical polymerization from phenol and amino-aromatic compounds to the various oxidation-reduction species dissolved in the solution was investigated by means of hydrodynamic voltammetry at a rotating disk electrode.

228 citations


Journal ArticleDOI
TL;DR: In this paper, a three-part experiment has been designed specifically for introducing cyclic voltammetry to students who are at the advanced undergraduate or early graduate level, and the experiment was conducted at the University of Southern California.
Abstract: This three-part experiment has been designed specifically for introducing cyclic voltammetry to students who are at the advanced undergraduate or early graduate level.

228 citations


Journal ArticleDOI
TL;DR: In this paper, the atomic-scale structural changes induced by potentiodynamic cycling of a well-characterized Pt(100) surface in 0.3 M aqueous HF were identified.

207 citations


Journal ArticleDOI
TL;DR: In this paper, a method for the electrodeposition of thin films of cupric hexacyanoferrate on glassy carbon and tin oxide electrodes has been devised, which is consistent with a model previously reported for Prussian blue films.
Abstract: A method for the electrodeposition of thin films of cupric hexacyanoferrate on glassy carbon and tin oxide electrodes has been devised. At low scan rates, in , these films exhibit nearly ideal cyclic voltammetric current‐potential waves with a peak potential of +0.69V vs. SCE on glassy carbon. Similar to the Prussian blue films described by Neff (1, 2), Itaya (3), and others (4), potassium ion is transported into the film during reduction. XPS and visible spectroscopy indicate that the redox involves the ferric and ferrous states of the hexacyanoferrate and not . The electrochemical properties as a function of potassium ion concentration and film thickness have been determined primarily from cyclic voltammetric studies, and evidence for electronic conduction through the film has been observed. Optical properties of the films were determined using deposited on tin oxide substrates. Supporting description of the electrochemical properties of the film has been obtained by a‐c impedance measurements. The film behavior is consistent with a model previously reported for Prussian blue films.

195 citations


Journal ArticleDOI
TL;DR: In this article, a methode generale de depot electrolytique de couches minces d'oxyde-hydroxyde de Cu, Ni, Co, Fe et Mn, a partir d'une solution aqueuse, sur une electrode a disque tournant de Pt, soit sous tension constant.
Abstract: Donnees sur une methode generale de depot electrolytique de couches minces d'oxyde-hydroxyde de Cu, Ni, Co, Fe et Mn, a partir d'une solution aqueuse, sur une electrode a disque tournant de Pt, soit sous tension constant, soit sous tension variant cycliquement

159 citations


Journal ArticleDOI
TL;DR: In this article, a voltammetrie cyclique, du comportement des complexes en solution aqueuse, avec determination dans ce but du potentiel redox des couples [([9] ane N 3 ) 2 M] 3+/2+ avec M=Mn, Fe, Co, Ni
Abstract: Etude, par voltammetrie cyclique, du comportement des complexes en solution aqueuse, avec determination dans ce but du potentiel redox des couples [([9] ane N 3 ) 2 M] 3+/2+ avec M=Mn, Fe, Co, Ni

116 citations


Journal ArticleDOI
TL;DR: In this paper, the reduction of anthracene in dimethylformamide in the presence of phenol was investigated, and it was shown that this reaction followed a "DISP1" limiting mechanism which involves the protonation of the anion radical as the rate-determining step followed by homogeneous electron transfer between the radical and the proptonated anion, yielding the monohydrogenated anions which is itself rapidly and irreversibly protonated into the final dehydrogenated product.

107 citations


Journal ArticleDOI
TL;DR: In this article, l'etude par voltammetrie cyclique, en presence d'une electrode de carbone vitreux, dans des solutions aqueuses de dioxanne.
Abstract: Resultats de l'etude par voltammetrie cyclique, en presence d'une electrode de carbone vitreux, dans des solutions aqueuses de dioxanne. Mise en evidence de l'influence de l'atome central sur les reactions d'electrode

89 citations


Journal ArticleDOI
TL;DR: In this article, the reduction of dioxygen to water has been investigated on ternary ruthenium(IV) oxides having the pyrochlore structure; in particular, compounds of the general form Bi2-2xPb2xRu2O7-y have been studied.
Abstract: The reduction of dioxygen to water has been investigated on ternary ruthenium(IV) oxides having the pyrochlore structure; in particular, compounds of the general form Bi2–2xPb2xRu2O7-y have been studied. Oxygen reduction on these materials appears to proceed by a rate-determining outer-sphere electron transfer, followed by displacement of OH– groups coordinated to RuIV by the much stronger nucleophile O2H˙. The cyclic voltammetry of these oxides is interpreted in the light of the X-ray and ultraviolet photoelectron spectra, and a connection between the bandwidth in these oxides and the potential of the main redox processes observed on the voltammagrams is suggested.

87 citations


Journal ArticleDOI
TL;DR: In this article, a pulsedpotential waveform applied at a frequency of ca. 1 Hz is demonstrated to provide direct amperometric detection of adsorbed amino acids at a Pt electrode.
Abstract: It is the general experience that most organic compounds including amino acids do not produce reversible or even quasi-reversible anodic waves at a Pt electrode under conditions of conventional cyclic voltammetry. Furthermore, amperometric detection of these compounds at a constant electrode potential is not successful because of the accumulation of adsorbed reaction products and/or an oxide film at the electrode surface. However, it is observed that a Pt electrode surface is cleaned quite effectively of adsorbed organic molecles and radicals simultanaeously with the anodic formation of the oxide layer. This oxidation of adsorbed organic species is concluded to be electrocatalyzed by PtOH formed as the first step in the production of the oxide layer (PtO). A pulsed-potential waveform applied at a frequency of ca. 1 Hz is demonstrated to provide direct amperometric detection of adsorbed amino acids at a Pt electrode. Satisfactory analytical precision (i.e., < 3% rel. std. dev.) results because the...

Journal ArticleDOI
TL;DR: In this paper, a non-stoichiometric V6O13±0.2 (VOy) prepared by thermal decomposition of NH4VO3 in N2 atmosphere is investigated cathode material for Li batteries.

Journal ArticleDOI
TL;DR: In this paper, a determination des potentiels de reduction d'isoalloxazines en fonction du pH, par voltammetrie cyclique sur couche mince.
Abstract: Determination des potentiels de reduction d'isoalloxazines en fonction du pH, par voltammetrie cyclique sur couche mince. Etude de l'oxydation par O 2 de dihydro-1,5 lumiflavines disubstituees-1,5

Journal ArticleDOI
TL;DR: In this paper, potential-step chronoamperometry has been applied to the study of the transfer of the tetramethylammonium (TMA+) ion across the interface between a 0.1 mol dm−3 lithium chloride aqueous solution and a tetrabutyammonium tetraphenylborate nitrobenzene solution.
Abstract: Potential-step chronoamperometry, cyclic voltammetry, and chronopotentiometry have been applied to the study of the transfer of the tetramethylammonium (TMA+) ion across the interface between a 0.1 mol dm−3 lithium chloride aqueous solution and a 0.1 mol dm−3 tetrabutylammonium tetraphenylborate nitrobenzene solution. An analysis of the current-time and current-potential curves obtained by means of potential-step chronoamperometry indicates that the transfer of the TMA+ ion across the water/nitrobenzene interface is a reversible diffusion-controlled process, which can be explained by the theory of the chronoamperometry of a reversible charge transfer at the electrode surface. The values of the diffusion coefficient of the TMA+ ion in the aqueous phase and of the reversible half-wave potential of the TMA+ ion transfer, as determined by means of potential-step chronoamperometry, agreed well with those determined by means of cyclic voltammetry and chronopotentiometry.

Journal ArticleDOI
TL;DR: In this article, the realisation d'un transfert d'electrons controle electrochimiquement and la formation d'une paire d'ions intramoleculaire dans des ethers lariates nitrobenzene substitues.
Abstract: Donnees sur la realisation d'un transfert d'electrons controle electrochimiquement et la formation d'une paire d'ions intramoleculaire dans des ethers lariates nitrobenzene substitues. Preparation du (nitro-2phenoxy)-2-methyl-15-crown-5, de ses reactions electrochimiques en presence de Na + ClO 4 − et de la formation d'un complexe de ce compose avec Na +

Journal ArticleDOI
TL;DR: In this paper, the electrochemical behavior of the studied complexes in various solvents has been investigated at Pt electrodes, and the solvent effect on standard potentials of oxidation and reduction can be described using the donor-acceptor approach.

Journal ArticleDOI
TL;DR: In this article, the electrochemistry of the,, and electrode phases in molten electrolyte at 400°C was studied using cyclic voltammetry at sweep rates of 0.02-1 mV/sec.
Abstract: The electrochemistry of the , , and electrode phases in molten electrolyte at 400°C was studied using cyclic voltammetry at sweep rates of 0.02–1 mV/sec. Emf's, polarization characteristics, and nucleation overpotentials were obtained for each major electrode reaction; the anodic nucleation overpotentials increased with emf for all three electrodes. The disulfide electrodes lost sulfur during the extended cyclic‐voltammetry tests. These losses appear to be associated with a nonequilibrium species that is involved in the electrochemical formation of the disulfides from their precursors.

Journal ArticleDOI
TL;DR: In this paper, the authors showed that the addition of small amounts of Tl(I) to NaOH results in a substantial catalytic effect on the kinetics of O2 reduction on gold.

Journal ArticleDOI
TL;DR: In this paper, the properties of iron electrode in CO2-saturated sodium chloride supporting electrolyte were investigated by cyclic voltammetry of static and rde-Ferrovac electrode in the potential region from −1.1 to −0.3 V (nhe).

Journal ArticleDOI
TL;DR: In this paper, the standard Gibbs energies of ion transfer across the water/nitrobenzene and water/1,2 dichloroethane immiscible electrolyte solution interfaces, have been determined using cyclic voltammetry and based on the tetraphenylarsonium tetramerylborate (TPAsTPB) assumption.

Journal ArticleDOI
TL;DR: The electrochemical behavior of the cation exchange polymer Nafion containing tetrathiafulvalenium (TTF+) on a platinum substrate is described in this paper, where very narrow cyclic voltammetric waves are observed that result in part from attractive interactions between the electroactive molecules.
Abstract: The electrochemical behavior of the cation exchange polymer Nafion containing tetrathiafulvalenium (TTF+) on a platinum substrate is described. The polymer electrode shows cyclic voltammetric behavior similar to that of solid films of TTF on platinum. In the oxidized form of the electroactive molecules in the polymer (TTF+) forms nonstoichiometric complexes with Br−. The peak potentials in cyclic voltammetry shift with changes in concentration of supporting electrolyte, temperature, and anion of the supporting electrolyte. Very narrow cyclic voltammetric waves are observed that result in part from attractive interactions between the electroactive molecules. The separation in peak potential of the reduction and oxidation waves is explained by formation of which stabilizes the oxidized form (TTF+) and makes it harder to reduce. Peak potentials for the oxidation and reduction shift closer together as the scan rate is lowered, which is explained by a "square (reaction) scheme."

Patent
27 Oct 1983
TL;DR: An electrochemical method for detecting and classifying microbial cells by applying a sweep potential between a working electrode and a counter electrode while microbial cells are brought into contact with the working electrode, and then measuring the generated current between the electrodes as mentioned in this paper.
Abstract: An electrochemical method for detecting and classifying microbial cells by applying a sweep potential between a working electrode and a counter electrode while microbial cells are brought into contact with the working electrode and, then, measuring the generated current between the electrodes. Cell numbers and types of cells of microorganisms, animals, and plants are determined from the peak current of cyclic voltammetry.

Journal ArticleDOI
TL;DR: In this article, the redox behavior of LiClO4, NaClO 4, KClO2, RbClO3, RbCo2, CsClO 2, TiClO 3, BaCo2, Zn(CF3SO3) 2, ZnCo2 2, ClO 2 ·2 H2O, (Et4N)3 Fe(CN)6, (Bu4N),3 Fe

Journal ArticleDOI
TL;DR: In this paper, cyclic voltammetry and ellipsometry were applied to investigate the growth and nature of the anodic oxide film on nickel in 0.1 M KOH.

Journal ArticleDOI
TL;DR: In this paper, the Kel-F-graphite (Kelgraf) electrode was shown to possess a signal-to-noise (S/N) advantage compared to continuous electrodes such as glassy carbon when used for detection of analytes in flowing streams.
Abstract: Results obtained in this laboratory and elsewhere suggest that carbon composite electrodes may possess a signal-to-noise (S/N) advantage compared to continuous electrodes such as glassy carbon when used for detection of analytes in flowing streams. One succomposite electrode which appears partic- ularly attractive in this regard is the Kel-F-graphite (Kelgraf) electrode, compression molded from Kel-F and powdered graphite and containing 5 to 30% graphite by weight. Studies of the electrode surface by scanning electron microscopy and X-ray photoelectron spectroscopy in conjunction with electrochemical investigations employing chronoamperometry, cyclic voltammetry, and capacitance measurements have led us to view the electrode surface as an ensemble of rnicroelectrodes, the dimensions of which can be varied by changes in particle size and/or ratio of Kel-F to graphite in the composite. The S/N advantage of the composite electrode apparently arises from a signal (current) enhanced by radial diffusio...

Journal ArticleDOI
TL;DR: In this paper, the large shifts in formal potentials (vs ferrocene/ferricinium internal standard) are interpreted on the basis of Gutmann's donor-acceptor concept for solvent-solute interaction.

Journal ArticleDOI
TL;DR: In this article, a mecanisme EC catalytique was used for electrooxydation de l'acide ascorbique and du nicotinamide adenine dinucleotide in resine epoxydegraphite.

Journal ArticleDOI
TL;DR: In this article, the DMF contenant de l'hexafluorophosphate de tetraethylammonium, avec bpy=bipyridyle-2,2' et (CO 2 Et) 2 -4,4'bpy=diethylcarboxy-4, 4' bipyridyl-2.2'
Abstract: Donnees theoriques et cas de [Ru(bpy) 3 ] 2+ , [Ru(4,4'-(CO 2 Et) 2 bpy) 3 ] 2+ et de 4,4'-(CO 2 Et) 2 bpy dans du DMF contenant de l'hexafluorophosphate de tetraethylammonium, avec bpy=bipyridyle-2,2' et (CO 2 Et) 2 -4,4'bpy=diethylcarboxy-4,4' bipyridyle-2,2'

Journal ArticleDOI
TL;DR: In this article, exact analytical expressions for both branches of the cyclic voltammograms generated when a reversible electroreduction occurs at a planar electrode are derived for both types of voltamograms.

Journal ArticleDOI
TL;DR: In this paper, the electrochemical reduction reactions of SO3 gas O2 and SO4S ions in a Na2SO4 melt at 900C were studied using cyclic voltammetry and chronopotentiometry.
Abstract: Cyclic voltammetry and chronopotentiometry were used to study the electrochemical reduction reactions of SO3 gas O2 and SO4S ions in a Na2SO4 melt at 900C. The reduction reaction of SO3 follows a ce mechanism: SO3 first reacts chemically with SO4S to form S2O7S and then proceeds via a one-electron electrochemical reduction reaction to form SO3 . The reduction of peroxide O2 ions forms either OS or both OS and superoxide O2S ions. Sulfate ions are subjected to decomposition at either very positive or very negative potentials. At very high positive potentials, sulfate ions decompose to evolve SO2 and O2 gases, in addition superoxide ions are also formed. At very negative potentials, sulfate ions decompose to form sulfide and peroxide. 24 references, 11 figures, 2 tables.