Showing papers on "Electrode potential published in 1977"
TL;DR: In this article, the authors verified the remarkable sensitivity of Raman spectroscopy for the study of adsorbed pyridine on a silver surface, and extended its applicability to other nitrogen heterocycles and amines.
3,897 citations
TL;DR: In this article, the chemical and photochemical behavior of MoS 2 -van der Waals surfaces in contact with an aqueous electrolyte has been investigated by means of electrochemical techniques.
348 citations
TL;DR: In this article, a breakdown model was proposed for the anodic formation of barrier oxide films on valve metals, where the initial electrons being injected into the film from the electrolyte were considered as an avalanching in the bulk of the barrier oxide film.
325 citations
TL;DR: In this paper, the anodic current due to hydrogen removal at 0.7 V was recorded by the oscilloscope and the current was found to decay after a certain time according to a law characteristic for the diffusion of hydrogen from the interior of the Pd wire to the surface as rate-controlling process.
96 citations
TL;DR: In this paper, experimental results concerning the kinetics of electron-transfer reactions at metal electrodes covered by anodic oxide films are discussed and compared to predictions from the theory, assuming a n -type semiconducting film.
69 citations
TL;DR: In this paper, galvanostatic pulse measurements in solutions of high chloride concentrations with current densities in the range 1-100 A/cm 2 have been examined by determining the transition time τ for the formation of salt layers.
43 citations
TL;DR: In this article, the non-coincidence of the experimental temperature coefficient of the potential of zero charge with the water dipole contribution to the electrode potential is demonstrated and discussed.
40 citations
TL;DR: In this article, the underpotential deposition of a Cu monolayer on single crystal gold electrodes of (111) and (100) orientation was investigated by cyclic voltammetry and, after removal of the electrode from the electrochemical cell and subsequent transfer into a vacuum chamber, by reflected high energy electron diffraction (RHEED).
Abstract: The underpotential deposition of a Cu monolayer on single crystal gold electrodes of (111) and (100) orientation is investigated by cyclic voltammetry and, after removal of the electrode from the electrochemical cell and subsequent transfer into a vacuum chamber, by reflected high energy electron diffraction (RHEED). It is found, that underpotential deposition of about 2/3 of a Cu monolayer causes a (√3 ×√3) R30 superstructure to appear in RHEED. After stripping, a faint superstructure of the same type is still visible in the RHEED pattern. Deposition and stripping of bulk Cu also rearranges the Au electrode surface in a characteristic way producing an additional (2 × 2) superstructure. No such structure is seen when the electrode potential is cycled only in the double layer charging region of Au and in the oxygen adsorption region. The observed RHEED patterns are discussed in terms of surface rearrangements during Cu deposition due to the formation of ordered surface and bulk alloys.
37 citations
TL;DR: In this paper, a manual ellipsometer using light of wavelength 546 nm was used to study the adsorption of α- and β-quinolines onto the mercury-0.5 M NaOH solution as a function of electrode potential and of concentration.
33 citations
Patent•
29 Mar 1977
TL;DR: In this article, a plating bath contains an electrolyte solution having a uniform ion concentration, and a common electrode, plating and a standard electrode are arranged in the bath, where a direct current source is connected between the common electrode and the plating electrode.
Abstract: In the present plating apparatus the bath contains an electrolyte solution having a uniform ion concentration A common electrode, a plating electrode and a standard electrode are arranged in the bath A direct current source is connected between the common electrode and the plating electrode A further, constant, direct current source is connected between the common electrode and the standard electrode A potentiometer device is arranged for detecting resistance changes between these electrodes due to variations in the ion concentration and in the mobility of the electrolyte solution between the electrodes A control is responsive to the potentiometer device for regulating the plating current supplied by the direct current source as a function of the potential difference detected by the potentiometer device, whereby a constant plating current density is achieved
27 citations
TL;DR: In this article, the potential drop along parallel electrodes of finite resistance has been calculated assuming a pure resistive representation of the cell and considering the polarization characteristics of an irreversible electrode reaction, and a factor Itot/Imax was derived which is a measure of the effective utilization of the electrode area.
TL;DR: In this paper, the presence of different molybdenum species on the metal surface with increasing electrode potential is confirmed and the presence and thickness of the layer is discussed with respect to electrochemical data.
TL;DR: In this paper, the effect of exposure mode of specimens on the morphology and the kinetics of development of covered pits growing in an 18Cr12Ni2MoTi austenitic stainless steel at a constant electrode potential (+ 860 mVNHE) was investigated.
Patent•
NEC1
TL;DR: In this article, a plating bath contains an electrolyte solution having a uniform ion concentration, and a common electrode, plating electrode and a standard electrode are arranged in the bath.
Abstract: In the present plating method the bath contains an electrolyte solution having a uniform ion concentration. A common electrode, a plating electrode and a standard electrode are arranged in the bath. A direct current source is connected between the common electrode and the plating electrode. A further, constant, direct current source is connected between the common electrode and the standard electrode. A potentiometer device is arranged for detecting resistance changes between these electrodes due to variations in the ion concentration and in the mobility of the electrolyte solution between the electrodes. A control is responsive to the potentiometer device for regulating the plating current supplied by the direct current source as a function of the potential difference detected by the potentiometer device, whereby a constant plating current density is achieved.
TL;DR: From polarographic and voltammetric measurements using carrier concentrations of the long lived isotope 99Tc, appropriate ranges of electrode potential for electrolytic reduction were determined and reaction conditions were predicted and experimentally confirmed for the electrolytic labelling of tetracycline and EDTA with carrier free 99mTc.
Patent•
30 Nov 1977
TL;DR: In this article, a method for galvanostatic and potentiostatic electrochemical measurement of the rate of corrosion of an object is described, where a working electrode, counter-electrode and reference electrode are immersed in an electrolyte and the electromotive force appearing on the cell formed by the working electrode and counter electrode is measured and related to the reference electrode and the corrosion rate of the object is derived therefrom.
Abstract: A method for galvanostatic and potentiostatic electrochemical measurement of the rate of corrosion of an object is described wherein a working electrode, counter-electrode and reference electrode are immersed in an electrolyte and the electromotive force appearing on the cell formed by the working electrode and counter-electrode is measured and related to the reference electrode and the corrosion rate of the object is derived therefrom, the object measured being utilized as a plurality of working electrodes utilized in combination with a plurality of reference electrodes An apparatus for performing the measurements as above described is also disclosed
TL;DR: In this article, the rotating ring-disk electrode technique has been used to study the adsorption of Tl(I) and Tl (0) on gold in slightly acidified 0.5 M KCl solution.
TL;DR: In this paper, the formic acid adsorption on an electrochemically prepared rhodium electrode has been studied by the radiochemical method, and it has been shown that starting from E = 0.20 V, the rate of HCOOH adaption is markedly potential dependent.
TL;DR: In this paper, the distribution of electrode reactions occurring in a stress corrosion crack which is growing by enhanced anodic dissolution has been used to analytically establish the electrode potential distribution within the crack.
Abstract: The distribution of electrode reactions occurring in a stress corrosion crack which is growing by enhanced anodic dissolution has been used to analytically establish the electrode potential distribution within the crack. This calculated potential distribution is discussed with reference to existing models for stress corrosion crack growth. The results of the analysis have been applied to the growth of stress corrosion cracks in a low alloy steel in 8 m sodium hydroxide solution at a temperature of 373 K.
TL;DR: In this paper, the voltammetric behavior of a new type of solid electrode with periodical renewal of the diffusion layer is described, achieved simply by means of a movement in an up and down sense of the electrode (pulsed electrode) with respect to the quiet solution.
TL;DR: In this paper, a theoretical basis is given to the new relaxation method proposed previously for use in the measurement of the standard rate constant of a redox reaction, which depends on measuring the potential change caused by a rapid change in the temperature of the electrode placed in an equimolar solution of the redox couple.
TL;DR: In this paper, a linear relationship was found between logarithmic current density, the electrode potential and the coverage of oxide, through the d-band vacancy in the electrode.
Patent•
05 Jul 1977TL;DR: DecDecaborane (14) is prepared by the chemical oxidation of the tetradecahydroundecaborate (-1) ion with an oxidant having an electrode potential (E°) of at least +0.6 volts.
Abstract: Decaborane (14) is prepared by the chemical oxidation of the tetradecahydroundecaborate (-1) ion with an oxidant having an electrode potential (E°) of at least +0.6 volts.
TL;DR: In this paper, the anodic evolution of sulphur has been complemented by a microscopic study of the surfaces of working anodes in a thin-layer cell, showing that sulphur is evolved as spheroidal globules, which do not appear to wet or passivate the electrode surface at current levels employed.
TL;DR: The dependence of the potential of platinum and gold electrodes in molten Na2SO4 on the composition of surrounding atmospheres of SO2 + O2, and of N2+O2 has been investigated at 900° as discussed by the authors.
TL;DR: In this article, the electrode reaction of copper-EDTA complex was studied polarographically in the presence of polyvinyl alcohol and the d.c. polarographic current-time curves were analyzed by using the equation given by Matsuda for the diffusion process of the depolarizer influenced by the adsorbates.
TL;DR: The mutual relationship between the Nernst potential, the diffusion potential and the recorded electromotive force, the concentration cell with and without the film (dividing barrier) and the eliminated values of the membrane and electrode potential is discussed.
TL;DR: In this article, the effect of temperature on the steady state oxidation of formic acid on platinized platinum electrodes in 0.5 M HCOOH+0.5M H2SO4 was investigated.