Showing papers in "Journal of Electroanalytical Chemistry in 1974"

TL;DR: In this paper, the effects of a strong adsorption of the depolarizer and/or of the product of the electrochemical reaction on the currents obtained in polarography and in linear potential sweep voltammetry (l.p.s.v.) are considered.

TL;DR: In this article, the potential difference between monolayer and bulk deposition is closely related to the difference in the work functions of substrate and deposit, causing a partial charge of the adatoms.

TL;DR: In this paper, a theoretical study of the adsorption peaks appearing in linear potential sweep voltammetry is presented under the following conditions: (a) the electrochemical reaction is reversible; (b) both the oxidized and the reduced forms are strongly adsorbed; and (c) allowance is made in the isotherm for interactions between the adorbed molecules.

TL;DR: In this article, a critical comparison was made of the hanging mercury drop (HMDE) and thin mercury film (TFE) electrodes when applied to the determination of trace metals in a range of environmental samples.

TL;DR: In this article, the saturation hydrogen coverage and the real surface area of an electrode were determined directly from the voltammogram of platinum and iridium electrodes in 5 M sulphuric acid at −72°C.

TL;DR: In this article, the significance of adsorption isotherms is discussed and several experimental examples taken from the literature illustrate the possible behaviour of the various parameters and constitute the basis for the establishment of diagnostic criteria to help interpret experimental adsoreption data.

TL;DR: In this paper, it was shown that iridium phase oxides can be formed in 1 or 0.1 M H2SO4 with a coverage of one oxygen atom per iridium surface site at 1.5 V on a triangular potential sweep.

TL;DR: In this paper, the impedance of solid ionic conductors in the form of powders, sinters and single crystals has been investigated and some theoretical models have been proposed and their anticipated impedance simulated; the results were displayed in the complex impedance plane.

TL;DR: In this paper, XPS measurements on electrochemically oxidised Pt suggest the existence of a single species, possibly Pt(OH) 2, up to potentials where coulometry indicates a limiting coverage.

TL;DR: In this paper, the conceptual significance of the absolute electrode potential is examined starting from the recent polemic between Bockris1 and Gileadi and Stoner3 and the results of this polemic are critically reviewed and shown to be questionable.

TL;DR: In this paper, the role of the oxide in the reaction has been examined in the light of some new experimental data and the existence of the equilibrium between the lower and higher oxide has been questioned.

TL;DR: In this article, the authors describe several modified simulation techniques, based on the use of a space grid of variable dimensions and/or an implicit solution which are of equally general applicability but which reduce computation times by a factor of a hundred without significant loss of accuracy.

TL;DR: In this article, an aqueous solution of tetrabutylammonium bromide and NaBr in contact with a nitrobenzene solution of TBR was studied and the overvoltagetime curves obtained were identical to the classical chronopotentiograms obtained with metal-solution systems.

TL;DR: The mecanismes d'oxydation de la Dopa en fonction du pH ont ete demontres par la mise en oeuvre de techniques electrochimiques variees.

TL;DR: In this article, the anodic formation and cathodic reduction of monomolecular oxide layers were investigated by the potentiodynamic sweep method on (111) and (100) planes of gold single crystals.

TL;DR: In this article, the complete potential-pH diagram of the Mg/H20 system was calculated and it was shown that there can be no thermodynamic equilibrium for the magnesium electrode unless there exists a hydrogen overpotential on the electrode which is assumed, by comparison with experimental results, to have a value of about 1 V.

TL;DR: In this article, the authors investigated the kinetics of CO2 adsorption on a platinized electrode and showed that the CO2 adaption is due to surface reaction with hydrogen adsorbed on the electrode.

TL;DR: In this paper, the frequency response of a two-electrode linearized system containing a single positively charged species and a single negatively charged species was investigated for an unsupported, intrinsic-conduction situation for a wide range of mobility ratios, valence number ratios, and reaction rate ratios.

TL;DR: In this paper, extensive computer simulations of differential pulse polarograms indicate that the background is due to double layer effects and the relative signal above background is maximized by long drop times and intermediate pulse amplitudes.

TL;DR: In this paper, the role of sweep rate in kinetic analysis by convolution potential sweep voltammetry is underlined and a method is evaluated over 3.5 orders of magnitude sweep rate using the fluorenone-fluorenone anion couple in acetonitrile.

TL;DR: In this paper, the behavior of GC on anodic polarization and subsequent reduction, in acid media, is described phenomenologically, and the possibility of employing a GC electrode for specular reflectance is demonstrated, opening up novel possibilities for further work such as the deposition of metals on an inert substrate such as GC.

TL;DR: In this article, the rate of neutralization of oxide by CO2 at the electrode surface is probably rate-determining, where (O−) is a transient species.

TL;DR: In this paper, a study of the polarographic behavior of a range of aromatic azo compounds, including hydroxy and nitro derivatives, in order to determine the effect of substituents on the reduction mechanism was made.

TL;DR: In this paper, the steady state overpotential of point electrode O 2, Me/solid oxide electrolyte was measured at low current density under low oxygen pressure and high oxygen pressure.

TL;DR: In this article, linear sweep voltammetry has been used to study the electrochemical properties of platinum, copper and copper sulfide electrodes in the absence and in the presence of potassium diethyldithiophosphate.

TL;DR: In this paper, steady-state mathematics is used to deduce an equivalent system involving only heterogeneous phenomena, which circumvents the need to simulate the details of the reaction layer thereby avoiding excessive computation times.

TL;DR: In this paper, the influence of medium effects, i.e. the variation of the chemical potential of the supporting electrolyte at constant concentration as the concentration of an organic compound in the same aqueous solution is changed, is analyzed from a theoretical point of view starting from Gibbs' equation.

TL;DR: In this article, it was shown from impedance measurements that the dissolution of zinc in alkaline solutions is consistent with a two-step mechanism Z n ( O ) ⇌ e Z n( I ) a d s Z n n ( I ) → r. d. s e Z N ( I I )

TL;DR: In this article, ausgegangen, dass der Purin-Teil des Adenosins, in Abhangigkeit vom Potential, parallel bzw. senkrecht zur Grenzflache adsorbiert werden kann.