Topic
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: In this paper, the authors attempted continuous electrochemical decomposition of chloroform that is the main compound of trihalomethanes and some toxic chlorinated hydrocarbons in water using a metal-impregnated carbon fiber electrode (CFE).
Abstract: Trihalomethane and other chlorinated hydrocarbons are known to be toxic to human health. However, removal of these compounds from water is not easy. We attempted continuous electrochemical decomposition of chloroform that is the main compound of trihalomethanes and some toxic chlorinated hydrocarbons in water using a metal-impregnated carbon fiber electrode (CFE). At Ag- and Zn-impregnated CFE, concentration of chloroform in 0.5 M K2SO4 (the supporting electrolyte) solution was decreased from 0.25 m mol/L to below the limit of detection of our analysis system (1 ppm) at a flow rate of 1 mL/min. The main product of electrolysis was methane. This high efficiency, determined by the chemical yield, hardly changed at a flow rate of 20 mL/min at a Ag-impregnated CFE. At a flow rate of 1 mL/min, chloroform was degraded with a decomposition efficiency of almost 100% even in the solution without the supporting electrolyte, whereas at a higher flow rate, the efficiency for the decomposition of chloroform decreased ...
58 citations
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TL;DR: In this article, the influence of cetyltrimethylammonium bromide (CTAB) on the electrochemical behavior of bisphenol A at the carbon paste electrode (CPE) was investigated.
Abstract: The influence of cetyltrimethylammonium bromide (CTAB) on the electrochemical behavior of bisphenol A at the carbon paste electrode (CPE) was investigated. CTAB, with a hydrophobic C-H chain, can adsorb at the CPE surfacevia hydrophobic interaction and then change the electrode/solution interface, and finally affects the electrochemical response of bisphenol A, confirming from the remarkable oxidation peak current enhancement. The electrode process of bisphenol A was examined, and then all the experimental parameters which affects the electrochemical response of bisphenol A, such as pH value of the supporting electrolyte, accumulation potential and time, potential scan rate and the concentration of CTAB, were examined. Finally, a sensitive and simple voltammetric method was developed for the determination of bisphenol A. Under the optimum conditions, the oxidation peak current of bisphenol A varied linearly with its concentration over the range from 2.5 x 10 - 8 to 1 x 10 - 6 mol/L, and the detection limit was found to be 7.5 x 10 - 9 mol/L. This method was successfully employed to determine bisphenol A in some waste plastic samples.
58 citations
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TL;DR: An electroanalytical method has been developed for the determination of two water soluble pyridine based neonicotinoid insecticides (imidacloprid and acetamiprid) by differential pulse voltammetry with a bismuth film electrode in aqueous BR buffer solution as supporting electrolyte as discussed by the authors.
Abstract: An electroanalytical method has been developed for the determination of two water soluble pyridine based neonicotinoid insecticides (imidacloprid and acetamiprid) by differential pulse voltammetry with a bismuth film electrode in aqueous Britton – Robinson buffer solution as supporting electrolyte. The bismuth film electrode preparation was optimized for cathodic voltammetric application. The reduction peaks of the neonicotionids appeared at potentials more negative than � 0.5 V (BiFE vs. Ag/AgCl/3.0 M KCl) and the signal characteristics depended on the pH of the supporting electrolyte. The best analysis conditions were found to be pH 8.0 for imidacloprid and pH 3.0 for acetamiprid at the following measurement parameters: pulse amplitude 50 mV, pulse width 50 ms and scan rate 25 mV. Calibration curves were linear in the concentration range of 2.43 – 51.1 mg/cm 3 for imidacloprid and 2.95 – 47.3 mg/cm 3 for acetamiprid, while the detection limits were 0.73 mg/cm 3 and 0.88 mg/cm 3 for imidacloprid and acetamiprid, respectively. The electroanalytical method has allowed monitoring the heterogeneous photocatalytic (O2/TiO2/UV) degradation of the two insecticides via their disappearance. The dynamics and the reaction rate determined on the basis of the electrochemical data were validated with HPLC/DAD and FTIR measurements.
58 citations
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TL;DR: In this paper, the steady-state faradaic current for H+ reduction on a 18 mu m diameter Pt microdisc located within few micrometres of the PANI film while cycling the potential of the film through different oxidation states was measured.
58 citations
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TL;DR: The identification of the redox sites for the compounds with high nuclearity was made possible by a bottom-up approach based on an extensive comparison of their electrochemical behavior with that of the simpler species as mentioned in this paper.
Abstract: The electrochemistry in liquid SO2 of RuII and OsII dendritic polynuclear complexes (two hexanuclear species, having as the core a bis-chelating ligand, and one decanuclear species, built around a metal core) has been performed together with that of several of their lower-nuclearity analogues (five dinuclear and one trinuclear species), which can be considered as components of the larger dendritic species. All of the compounds contain 2,3- or 2,5-bis(2-pyridyl)pyrazine (2,3- or 2,5-dpp) as bridging ligands and 2,2‘-bipyridine (bpy) as terminal ligands. The identification of the redox sites for the compounds with high nuclearity was made possible by a bottom-up approach based on an extensive comparison of their electrochemical behavior with that of the simpler species. Owing to the large anodic potential window of liquid SO2 (to ∼4.3 V vs SCE under our experimental conditions) in conjunction with tetrabutylammonium hexafluoroarsenate as supporting electrolyte, several metal- and ligand-centered oxidations ...
58 citations