Voltammetry at partially covered electrodes Part II. Linear potential sweep and cyclic voltammetry
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Linear sweep voltammetry
Chronoamperometry
Linear sweep voltammetry
Ultramicroelectrode
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Electrochemical reactions involved in the electrodeposition of PbSe and the electrochemical behaviour of the related precursors, HSeO3− and Pb(EDTA)2−, have been studied for the first time by combined electrochemical quartz crystal microbalance and cyclic voltammetry measurements. Formation of PbSe was found to occur by an induced codeposition mechanism via a six-electron reduction reaction. HSeO3− is reduced by a four-electron reaction but the electrode becomes passivated. The reduction and oxidation of Pb(EDTA)2− occur via two-electron mechanisms, on the other hand, during the oxidation adsorption reactions are also observed.
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Linear sweep voltammetry
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A combined voltammetric study of the joint transfer of the two constituting ions of a water-soluble salt has been carried out using normal-pulse voltammetry, linear-sweep voltammetry and square-wave voltammetry in a system with two liquid–liquid polarized interfaces. As a result, we have explained the voltammetric features that allow us to distinguish this uptake from that corresponding to two equally charged ions, in spite of the appearance in both situations of two current peaks with the same sign in both square-wave and linear-sweep voltammograms, and we have found that linear-sweep voltammetry and square-wave voltammetry complement each other excellently.
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PtRu /MWCNTs anodic catalyst was synthesized by hydrothermal treatment.The electrocatalytic oxidation of methanol was studied by cyclic voltammetry,linear sweep voltammetry,chronoamperometry and impendance spectroscopy.It was found that PtRu/MWCNTs catalysts synthesized in hydrothermal condition had higher electrocatalytic activities and better tolerance to poisoning species in methanol oxidation than that of PtRu/Vulcan XC-72.
Chronoamperometry
Linear sweep voltammetry
Hydrothermal Synthesis
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Polymer/graphene quantum dots (PGQDs) composite electrochemical sensors are used for the detection of glucose. The PGQDs composite were synthesized by situ chemical oxidation polymerization method. The optical properties was studied by UV-Visible spectroscopy, the surface morphology by Field emission scanning electron microscopy (FESEM), the electrochemical performance and glucose detection were investigated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) reveals that PGQDs nanocomposite shows the enhanced electrocatalytic activity towards the oxidation and reduction and which enhances the electrochemically catalytically current during cyclic voltammetry. It exhibits the stable electrochemical sensors for detection glucose and good agreement with regression value R2=0.965.
Linear sweep voltammetry
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Linear sweep voltammetry
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Solid polymer electrolytes (SPEs) are promising candidates for solid-state lithium-ion batteries. Potentially, they can be used with lithium metal anodes and high-voltage cathodes, provided that their electrochemical stability is sufficient. Thus far, the oxidative stability has largely been asserted based on results obtained with sweep voltammetry, which are often determined and reliant on arbitrary assessments that are highly dependent on the experimental conditions and do not take the interaction between the electrolyte and the electrode material into account. In this study, alternative techniques are introduced to address the pitfalls of sweep voltammetry for determining the oxidative stability of SPEs. Staircase voltammetry involves static conditions and eliminates the kinetic aspects of sweep voltammetry, and coupled with impedance spectroscopy provides information of changes in resistance and interphase layer formation. Synthetic charge–discharge profile voltammetry applies the real voltage profile of the active material of interest. The added effect of the electrode active material is investigated with a cut-off increase cell cycling method where the upper cut-off voltage during galvanostatic cycling is gradually increased. The feasibility of these techniques has been tested with both poly(ethylene oxide) and poly(trimethylene carbonate) combined with LiTFSI, thereby showing the applicability for several categories of SPEs.
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Linear sweep voltammetry
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Linear sweep voltammetry
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