Showing papers in "Electrochimica Acta in 1970"

TL;DR: The cathodic and anodic properties of the oxygen-peroxide couple have been studied on ordinary pyrolytic graphite, high-pressure annealed graphite and single crystal graphite in alkaline solutions using the rotating disk technique as mentioned in this paper.

TL;DR: In this article, the authors investigated the mechanism determining the mass transfer at a gas evolving electrode, and determined the thickness of the Nernst diffusion layer as a function of the current density for both hydrogen and oxygen evolving on horizontal and vertical electrodes in acid as well as in alkaline solutions.

TL;DR: In this paper, the morphology of films formed in H2SO4-Na2SO 4 mixtures for different times at various constant cds has been studied as a function of electrolyte concentration, pH and temperature, using electron microscopy.

TL;DR: The potential range for the formation of Pt(II) corresponds to that predicted on thermodynamic grounds for the reduction of PtO 2, and an unidentified species is produced during the oxidation of the platinum electrode.

TL;DR: In this article, the breakdown of anodic films on Al and Ta, during their formation is always associated with crystallization, and various possible mechanisms for the electrolytic breakdown are discussed.

TL;DR: In this article, a study of capacitance measurements of porous alumina films in acidic chloride and sulphate solution has shown that the dissolution mechanism can be described using zero-order kinetics.

TL;DR: In this paper, the passivation process of the Pb/PbSO 4 electrode was investigated by measuring the potential, capacitance and resistance during galvanostatic anodic polarization and a subsequent open-circuit period.

TL;DR: In this paper, the anodische Oxydation von Wasserstoff an glatten Wolfram carbidelektroden is considered, and the adaption an Wolfram carbid is bestimmt.

TL;DR: In this article, it was shown that the breakdown voltage is mainly dependent upon the anion and not upon acidity, in both acid and neutral solutions, and the results were explained in terms of the introduction of anions into the oxide film and its ultimate disruption by mechanical forces when its thickness reaches a value determined by the type and amount of anion introduced.

TL;DR: In this article, the diffusion coefficient and solubility of hydrogen in metal foils were derived by a very sensitive electrochemical method at room temperature, and in some cases with temperatures up to 80°C, for platinum, nickel, tantalum, titanium, zirconium, manganese and iron-chromium alloys.

TL;DR: In this article, a quantum-mechanical theory for proton transfer processes in solution is given, and the Bronsted rule and isotope effect for these processes are also discussed.

TL;DR: In this paper, a new method was developed for the study of first-order electrode reactions, which involves current measurements at just two selected potentials, and yields accurate values for the transfer coefficient and the exchange cd.

TL;DR: In this paper, a theory for the mechanism of electrolysis with a flowing solution on a porous electrode is discussed, and a theory is constructed based on several simplifying assumptions, including the distribution of reactant concentration and local limiting cd in the porous electrode.

TL;DR: In this article, the potential/pH diagram for a copper-ammonia water system used by several workers in investigations of the stress-corrosion cracking of brass is recalculated.

TL;DR: In this article, anodic oxide films were prepared from pure aluminium, titanium, niobium, tantatlum and tungsten, and examined by direct transmission electron microscopy.

TL;DR: In this paper, it was shown that the chemisorption appears to take place about two main potentials and the difference between these may be associated with the difference in surface energy of two crystal faces of the platinum.

TL;DR: In this paper, the rate-determining step at high cds is the first discharge step and a chemical step which follows a charge-transfer step becomes the rate determining.

TL;DR: In this article, different methods of deducing the basic equation of the thermodynamic theory of electrocapillarity for hydrogen-adsorbing metals are compared and the relations that determine the value of the isoelectric potential shift under different conditions, as well as the importance of the dependence of the potential on the solution pH, the free charge remaining constant, have been deduced and experimentally verified.

TL;DR: In this article, a method of continuous mechanical renewal of the reaction surface of a solid metal electrode has been used for investigation of the kinetics of various characteristic electrode processes, such as active anodic dissolution (Fe, Ni, Pb, Sn), anodic passivity (Ti, Cr, Ni), and corrosion processes on Fe and Ni.

TL;DR: In this article, the overvoltage on the C, CO2 electrode in cryolite-alumina melts was studied by steady state current/voltage measurements using different types of carbon.

TL;DR: In this article, surface interactions between halogens (chloride and bromide) and adsorbed hydrogen on platinum in perchloric acid modify the hydrogen adsorption parameters to produce negative Temkin isotherms.

TL;DR: In this paper, the authors investigated the processes contributing to the anodic and cathodic off-gases in the electrolysis of the molten ternary eutectic, (Li, Na, K/CO 3 ) at 500°C. with a compartmented electrolysis cell and an on-stream gas chromatographic technique.

TL;DR: In this article, the limiting anodic process was studied by steady state and transient galvanostatic techniques in melts of different basicities, and discharge mechanisms were proposed to explain the observed behaviour.

TL;DR: In this article, a square-wave modulation technique has been used to obtain spectroscopic evidence for changes in the concentration of n −carries within the space charge region of n -type germanium electrodes.

TL;DR: The desorptioon of bismuth from a platinum electrode in acid solution is studied in this paper, where it is shown that bissuth can form a monolayer on the surface of the platinum at potentials which are somewhat more positive than the expected plating-out potential.

TL;DR: Oscillograms of surface-tension amplitude vs mean potential were obtained for solid electrodes at frequencies 1 and 5 Kc/s simultaneously as discussed by the authors, where the electrode movement is a sum of two independent oscillations with amplitudes smaller than atomic dimensions.

TL;DR: In den Messungen folgt, daβ die Bruttoreaktion Zn⇄Zn2+ + + 2 e uber zwei konsekutive Durchtrittsreaktionen with adsorbiertem einwertigem Zink als Zwischenprodukt ablauft.

TL;DR: In the absence of a buffer, hypochlorite has to build up in the bulk before anodic chlorate formation can set in at appreciable rate as mentioned in this paper, which is consistent with the fact that in concentrated NaCI solution the formation rates were smaller than those predicted for a purely diffusion-controlled process.