Showing papers in "Electrochimica Acta in 1979"

TL;DR: The faradaic and non-faradaic processes taking place at the interface of two immiscible electrolyte solutions have been compared with analogous processes occurring at interface metal-electrolyte solution as discussed by the authors.

TL;DR: In this paper, the potentiodynamic behavior of iron in alkaline solutions under carefully controlled perturbation conditions reveals that the overall electrochemical process is more involved than was thought earlier, and the electrochemical characteristics of the systems are explained through a series of successive conjugated redox couples principally involving Fe(OH), Fe( OH) 2 and FeOOH as limiting stoichiometric species.

TL;DR: In this paper, a semiconductor model of the passive layer was used for the explanation of transfer reactions of electrons (etr) and ions (itr) on passive iron electrodes, which takes place via the conduction band at low potentials and via the valence band at high potentials.

TL;DR: In this paper, Li/1 M LiClO4 propylene carbonate/TiO2 cell, which has an open circuit voltage of 2.85-2.90 V and 950 Wh/kg of theoretical energy density, is presented.

TL;DR: In acid solution, pyrite gives reproducible anodic current as discussed by the authors, with Tafel slopes 95 ± 10 mV, and no influence of Pyrite semiconducting properties on the kinetics of the anode process.

TL;DR: In this paper, the characteristics of oxygen reduction on high surface-area carbon supported metallophthalocyanines have been studied in 8 N H2SO4 and also in 6 N KOH.

TL;DR: In this article, the corrosion and polarization characteristics of zinc have been studied in molar, quiescent solutions of NaClO4, NaCl and Na2SO4 in the pH range 3.0-5.8.

TL;DR: In this article, it is confirmed that nitrate reduces to ammonia in high yield at a copper cathode in aqueous acidic perchlorate and sulphate media at pH below 2, well formed reduction waves are observed; the process is irreversible but in the plateau region it is mass transfer controlled.

TL;DR: In this paper, the massive Mn oxides were synthesized and their anodic characteristics were investigated in aqueous solutions, and it was suggested that the oxidation process of the electrode surface is a common rate-determining step in both reactions on massive Mn oxide electrodes.

TL;DR: The standard potential of the couple has been shown to be 1.81 V in aqueous solution at 25°C as discussed by the authors, which is consistent with the chemical properties of H2SO5 (Caro's acid).

TL;DR: In this paper, the effect of the current density, the composition and concentration of the electrolyte and the nature of the anodized metal on the features of electric breaking down and on the value of the breakdown voltage is studied.

TL;DR: In this paper, the redox system Cu(NH3)2+/1+x, Fe(CN) 3− 4− 6 and Fe3+/2+ and oxygen reduction have been studied on MoS2 surfaces normal to the C-axis and parallel to the c-axis, using rotating disc electrodes under potentiostatic conditions.

TL;DR: In this paper, a model is presented to correlate mass transfer data at gas evolving electrodes, based on models for heat transfer phenomena in nucleate boiling, with reference to models for mass transfer phenomena.

TL;DR: In this paper, the photo-induced anodic oxidation of water into oxygen and the reduction of oxygen into hydrogen peroxide was investigated on anodized titanium sheets under illumination at rest potential.

TL;DR: In this paper, steady state, potential step and impedance measurements were used to investigate the influence of fluoride ions on the passive dissolution of Ti in 4.5 M H 2 SO 4 solution.

TL;DR: In this paper, the glass phases showing high ionic conductivity at room temperature were prepared through a rapid quenching of the molten mixtures of the system AgIAg2OB2O3 (a fixed Ag2O/B 2O3 = 1 molar ratio was always considered): the obtained specimens were homogeneous and transparent cylindrical blocks.

TL;DR: In this article, the authors used the ultra thin electrode technique to study carbon blacks, active carbons, and graphites, and showed that the pH dependence of the reaction at constant cd is zero, as pH or KOH concentration increases.

TL;DR: In this paper, anodic properties of La1−xSrxMnO3 electrodes were investigated in alkaline solutions and it was found that the catalytic activity for the oxygen evolution reaction was relatively high and increased with the increase of x in La 1−x SrxMmO3.

TL;DR: In this article, the comportement d'electrodes a pâte de carbone composes electroactifs peu solubles incorpores et liant electrolytique a ete etudie, ainsi que l'influence de differents parametres affectant l'allure des courbes voltamperometriques and chronoamperometric sensors.

TL;DR: In this paper, the free energy of formation of MoO2 at steelmaking temperature calculated from the data of cell(I), cell(II), and cell(III) was analyzed.

TL;DR: In this article, the ionic radii for Me 4 N +, Pr 4 N+ and Bu 4 n + ions in solution of various non-aqueous solvents have been calculated.

TL;DR: The experimental value of polarization resistance is very often determined by plotting the polarization curves at the vicinity of the rest potential by a triangular voltage sweep technique as mentioned in this paper, and it is found that for materials having high resistivity against corrosion, the value of resistance is largely dependent on the sweep rate or the period of sweep cycle.

TL;DR: In this paper, an engineering analysis for an electrolytic reactor incorporating a stacked net electrode in which the electrolyte flow is in longitudinal direction and the current flow in the normal direction is carried out.

TL;DR: In this paper, the authors dealt with the mass transfer in an electrochemical reactor for the recovery of copper, using a flow through porous electrode technique, performed in an electrolysis cell made up of spherical particles covered with copper and percolated by a dilute sulfuric acid solution of Cu2+ ions.

TL;DR: In this paper, it was shown that when the incorporation rate is limited by crystallization of an intermetallic layer, it is linearly related to potential within the homogeneity region of intermetall compounds.

TL;DR: In this paper, the Cl 2 evolution reaction was investigated on RuO 2 /TiO 2 electrodes of various composition in 1 M HCl and 1 M KCl electrolyte by means of stationary and non stationary i-E curves and by ac impedance.

TL;DR: In this paper, a theoretical description of a hydrodynamic model for mass transfer at gas evolving electrodes where no coalescence of gas bubbles occurs is given, and the thickness of the Nernst diffusion layer, δ, has been determined as a function of the volumetric rate of the gas evolution.

TL;DR: In this article, the anodic oxidation of cuprous sulphide was studied using a carbon paste electrode and typical voltammetric curves were obtained, showing that at slow rates, the oxidation of Cu 2 S in CuS and Cu 2+ occurs via the formation of non stoichiometric compounds.