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Supporting electrolyte
About: Supporting electrolyte is a research topic. Over the lifetime, 5011 publications have been published within this topic receiving 104172 citations.
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TL;DR: A second limitation of the described procedure is that with the KCl electrolyte the immobilized film must be reoxidized prior to each measurement, which preliminary data suggest is alleviated by switching to a basic supporting electrolyte.
Abstract: Cyclic voltammetry of a mixture containing 0.2 mM Na2IrCl6, 0.1 mM PdCl2, 0.2 M K2SO4, and 0.1 M HCl between 1.2 and -0.3 V vs Ag/AgCl for five cycles at 50 mV s-1 yields a stable film on a glassy carbon electrode. The reduction of hydrogen peroxide in 0.1 M KCl is diffusion controlled at that modified electrode. Calibration curves obtained at a 100 mV s-1 scan rate are linear in the range 0.2-1.8 mM H2O2. The slope, 28 microA L mmol-1, is independent of film thickness. Since dissolved oxygen is reduced at about the same potential as H2O2, -0.3 V, at the modified electrode, it will act as an interferent in solutions that are not deaerated; however, the currents are additive. A second limitation of the described procedure is that with the KCl electrolyte the immobilized film must be reoxidized prior to each measurement. Preliminary data are described which suggest that this problem is alleviated by switching to a basic supporting electrolyte.
64 citations
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.
64 citations
TL;DR: The electrochemical elimination of dye and the profile of the carboxylic by-products formed depend on the nature of material, pH and supporting electrolyte, and it is demonstrated that the concentration of active chlorine species depends on the pH conditions and electrode material.
64 citations
TL;DR: In this article, the electrochemical oxidation of sodium borohydride (NaBH4) was systematically studied on platinum-dysprosium (Pt-Dy) alloys in alkaline media with respect to application in direct bor-ohydride fuel cells (DBFCs).
63 citations
TL;DR: Results suggest that when the film is dehydrated and the density of redox centers is increased, electron or hole hopping dominates the rate of homogeneous charge transport through the film, which is close to that expected for an electrochemical reversible reaction involving a surface-confined reactant.
Abstract: Thin films of the perchlorate salt of an [Os(N,N‘-alkylated-2,2‘-biimidazole)3]2+/3+-containing polymer have been formed on planar platinum microelectrodes. The electrochemical response associated with the Os2+/3+ couple occurs at −0.19 V. In aqueous perchlorate media at near-neutral pH the voltammetric response is close to that expected for an electrochemically reversible reaction involving a surface-confined reactant. Chronoamperometry conducted on a microsecond time scale indicates that the film and solution resistances are comparable for low concentrations of supporting electrolyte. However, for LiClO4 concentrations greater than 0.4 M, RFilm contributes less than 25% of the overall cell resistance. These results suggest that when the film is dehydrated and the density of redox centers is increased, electron or hole hopping dominates the rate of homogeneous charge transport through the film. The rate of homogeneous charge transport, characterized by DCT1/2Ceff, where DCT is the homogeneous charge tran...
63 citations