1,721,026 research outputs found
A regular perturbation approach to the problem of diffusion towards a growing mercury drop electrode
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An electrochemical impedance study on the interfacial behaviour of KC8 electrodes in LiClO4 containing electrolytes
No full textThe evolution of the impedance spectra of KC8 electrodes in 1 M LiClO4 + ethylene carbonate + dimethylcarbonate solution have been studied under open circuit voltage as a function of time. Additional studies have been performed before and after potassium deintercalation and in cycled electrodes. It has been found that KC8 slowly decomposes giving rise to a layer of insoluble KClO4 on the electrode surface that protects the compound from further decomposition. The interface may be simulated using two passivating layers in addition to the charge transfer and diffusion impedance. The same type of equivalent circuit, with the eventual inclusion of a third layer, may be used to simulate the spectra after K deintercalation, and during lithium intercalation. (C) 1999 Elsevier Science S.A. All rights reserved
Molten salt batteries
No full textThe basic thermodinamics of galvanic cells and the fundamentals of electrode kinetics are briefly reviewed with reference to batteries. The advantages of molten salts as electrolytes or as active components in practical batteries are discussed. The molten salt cells currently under development are described
An AC Impedance Spectroscopy Study of Mg-doped LiCoO2 at Different temperatures: Electronic and Ionic Transport Properties
No full textDeconvolution of thin-layer UV-VS spectroelectrochemical data for an EE electrochemical process
No full textUse of microelectrodes and spectroelectrochemical techniques in the study of redox properties of organometallic complexes
No full textThe electrochemical behaviour of the “Costa-type” coenzyme B12 model neopentyl-N2,N2'-propane-diylbis (2,3-butanedione-2-imine-3-oxime) Co(III) perchlorate complex has been studied using a platinum inlaid disk microelectrode techniques over a wide range of supporting electrolyte concentrations, and thin-layer absorption spectroelectrochemistry. In the former case, the separation of the two single electron transfers leading to Co(I) increased with decreasing supporting electrolyte concentration and, at the same concentration of the supporting electrolyte, with increasing radius of the cation. The likely explanation for this behaviour is the influence of ion-pair formation on the reduction potential of the redox couple involved in the second electron transfer that leads to a Co(I) complex bearing a negative charge.It has been demonstrated that the plot of the derivative of the steady-state current with respect to the electrode potential vs. E is morphologically identical to the derivative of the absorbance in thin-layer spectroelectrochemistry, and that the correlation between the results obtained using the two different techniques is useful for a better understanding of the electrochemical process
Staircase voltammetric stripping analysis from a mercury plated reticulated vitreous carbon (RVC) electrodes
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