Showing papers on "Supporting electrolyte published in 1975"
TL;DR: In this paper, it has been shown that extrapolating the dependence of the i, φ curves for the electroreduction of the S2O82− anion in the presence of 0.05 M KCl on the r.p.
78 citations
TL;DR: In this paper, the possibility of sulfidation of platinum analogous to its anodic oxidation postulated by Najdeker and Bishop was confirmed by electron diffraction using sputtered platinum thin film electrodes.
58 citations
TL;DR: In this paper, the effect of solvent composition on the kinetics of electrode reactions has been discussed in terms of the equilibrium concentration of depolarizer in the surface phase adjoining the electrode, where the solvent composition is different from that in the bulk α.
53 citations
TL;DR: In this article, the effect of the diffuse double layer upon the reduction rates of Eu3+ and Cr3+ at mercury electrodes in various sodium and lanthanum perchlorate supporting electrolytes have been studied over as large a potential range as possible by using both chronocoulometry and d.c.H. polarography.
48 citations
TL;DR: In this paper, it was shown that the weak specific adsorption of ions not involving the recharging of the electrode surface is characterized by the following unusual features: practical absence of any shift of p.z.c., a very small discrepancy between the experimental differential capacity curves and similar curves calculated under the assumption that specific adaption is absent (q1 = 0), insensitivity of the total surface excess of cations to their distribution between the dense and diffuse layers, practical independence of q1 of temperature and the bulk concentration of binary electrolyte; practical coincidence of c
37 citations
TL;DR: In this paper, the adsorption of acetone on a mercury electrode from (CH 3 ) 2 CO+H 2 O+HCl solutions has been studied using a thermodynamically rigorous procedure.
22 citations
TL;DR: In this article, the parameters of the electrochemical reduction of the Cd-NTA− at pH=8 were obtained by d.c.H. and square wave polarography.
21 citations
20 citations
TL;DR: Indium has been extracted as its oxinate into molten naphthalene, the naphhalene allowed to solidify and then separated and dissolved in dimethylformamide, and the indium determined polarographically inDimethylforiaamide medium with pyridium perchlorate as supporting electrolyte.
17 citations
TL;DR: In this paper, small amounts of thallium(I), lead(II) and copper (II) can be determined by means of differential pulse anodic stripping voltammetry with a thin mercury-film electrode in unstirred solutions.
Abstract: Small amounts of thallium(I), lead(II) and copper(II) can be determined, each of them in the presence of a thousand-fold excess of the other ones, by means of differential pulse anodic stripping voltammetry with a thin mercury-film electrode in unstirred solutions. The supporting electrolyte is a potassium nitrate solution at pH 3.5. The mercury film is plated in situ on a glassy carbon electrode. Thanks to the small film thickness a resolution between the lead and thallium redissolution peaks is obtained, while with a hanging mercury drop electrode there is a considerable overlap. In the nanogram/ml-range the standard deviation is not larger than 5–10%.
14 citations
TL;DR: In this article, the results of electropolymerization in situ of certain acrylic and methacrylic esters to produce coherent, continuous coatings on steel sheet cathodes using tetra-n-butyl ammonium perchlorate as supporting electrolyte in either DMF or DMSO under galvanostatic conditions are described.
TL;DR: In this article, the effect of pH, buffer composition and supporting electrolyte concentration on the reduction mechanism of the binuclear, dioxo-bridged Mo(V) complex Mo 2 O 4 (EDTA) 2− has been investigated at mercury electrodes in pH 7-10 borate, phosphate and NH 4 + /NH 3 buffers.
TL;DR: In this paper, the activity coefficient of HCl at constant ionic strength changes less when LiClO 4 is used as a supporting electrolyte than when NaClO4 is used.
TL;DR: In this paper, the polarographic reduction mechanism of Cd-DTPA complexes is compared with the Cd NTA and -EDTA compelxes in aqueous NaCl solution, and it is concluded that if the species of the charge z=−1 is predominantly present in the bulk of the solution, it is reduced under diffusion control without chemical transformation, like CdNTA−.
TL;DR: In this article, the three redox reactions ferric/ferrous, ferricyanide/ferrocyanide and quinhydrone were studied by faradaic rectification measurements at solid platinum and gold electrodes in the range 100 kHz-1 MHz.
TL;DR: In this article, the authors studied the effect of bromide and chloride in MeCN solutions under a wide range of experimental conditions, including direct and reverse chronopotentiometry.
TL;DR: In this article, the first polarographic measurements on oxonium ions in methylene chloride in the presence of tetra-n-butylammonium tetrafluoroborate supporting electrolyte are described.
Abstract: The techniques used for the first polarographic measurements on oxonium ions in methylene chloride in the presence of tetra-n-butylammonium tetrafluoroborate supporting electrolyte are described. A three electrode polarographic cell was used with a dropping mercury working electrode, platinum counter-electrode, and silver iodide in methylene chloride reference electrode. The triethyl-and the ethyl(tetramethylene)-oxonium ions are reduced in a one-electron, irreversible step at half-wave potentials of –0.33 and –0.30V, respectively. As the diffusion current is proportional to the concentration of the oxonium ion, polarography can be used to assay tertiary oxonium ions down to 10–4M.
TL;DR: In this article, the polarization of a plane platinum electrode in nitrobenzene solutions was measured and discussed, and the results indicated a strong interaction of the electrode reactions at such low spacings and the formation of ions from the weakly ionized impurities of nitro benzene.
TL;DR: In this paper, the authors investigated the kinetics of hydrogen discharge in solutions of HCl-DMSO within 10 −3 1 N HCl concentrations, in the presence of KClO 4 as supporting electrolyte.
TL;DR: In this paper, the effect of TBP and organic diluents on the polarographic wave of U(VI) reduction has been investigated in sulphuric and perchloric acids.
Abstract: The effect of TBP as well as the organic diluents on the polarographic wave of U(VI) reduction has been investigated in sulphuric and perchloric acids. It was found that the presence of TBP traces in the solution to be analyzed induced another wave which was more prominent in sulphuric acid solutions. This can be eliminated by boiling the solutions for about 5 min before their analysis for uranium. The effect of supporting electrolyte on the polarographic reduction of U(VI) was also studied and the use of 6N HClO4 was recommended.
TL;DR: Polarographic reduction of nitrate took place in the ascending branch of an Fe(II) reduction wave in an unbuffered solution (pH 4−6) of a supporting electrolyte that contained iodate.
Abstract: Polarographic reduction of nitrate took place in the ascending branch of an Fe(II) reduction wave in an unbuffered solution (pH 4–6) of a supporting electrolyte that contained iodate. In the potential region of reducing nitrate, the current varied periodically of which the period depended on the experimental condition.
TL;DR: In this paper, the double layer interaction energy of two parallel plate-like particles is calculated at contact of the two outer Helmholtz planes (o.h.p.'s), and it is shown that although this energy exceeds the classical expression obtained by assuming the potential at the o.p. to be independent of plate separation, it remains finite.
Patent•
25 Jun 1975
TL;DR: In this paper, a reference electrode and a measuring electrode sensitive to the activity of hydrogen ions of the indicator circuit and an anode and a cathode electrode of the generator circuit, are arranged in the measuring cell of the measuring apparatus.
Abstract: The invention relates to coulometric measuring for the determination of the concentration and/or factor of acids or bases. A reference electrode and a measuring electrode sensitive to the activity of hydrogen ions of the indicator circuit and an anode and a cathode electrode of the generator circuit, are arranged in the measuring cell of the measuring apparatus. As a depolarizer and potential determining substance, the chloride, bromide or iodide of potassium, sodium, rubidium, cesium, calcium, strontium or barium is added in excess to the supporting electrolyte in the measuring cell. Inaccuracy and instability brought about by the diffusion potentials arising at the diaphragms can thus be eliminated.
TL;DR: In this paper, a common aprotic solvent, the dissolved oxygen is reduced to superoxide, and then to peroxide with tetraalkylammonium salt as the supporting electrolyte.
Abstract: In a common aprotic solvent, the dissolved oxygen is reduced to superoxide, and then to peroxide with tetraalkylammonium salt as the supporting electrolyte. With alkali metal ion as the supporting electrolyte, it is reduced further to form the third wave. All of these waves are controlled by the successive chemical reaction; namely if the products due to the successive reaction are stable, the reduction potential shifts to more positive direction. When the solvated ion of the supporting electrolyte is small, it forms stable complex with oxygen radicals, hence the reduction waves shift to positive potentials.
TL;DR: In this article, the authors investigated the kinetics of hydrogen discharge in solutions of HCl-DMSO within 10 −3 1 N HCl concentrations, in the presence of KClO 4 as supporting electrolyte.
Abstract: The kinetics of hydrogen discharge in solutions of HCl-DMSO is investigated within 10 −3 1 N HCl concentrations, in the presence of KClO 4 as supporting electrolyte. The cathodic slope is 0·120 V/decade for all solutions. The electrochemical reaction order with respect to the hydrogen ion concentration at E = −0·6 V is found to be 0·52. The stoichiometric number is practically equal to 2. The experimental activation energy is 11·2 kcal/mole. The cathodic process is interpreted with the discharge reaction as rate determining step, followed by the adatom recombination reaction.