Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"chronoamperometry"”.
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A study of an animal model of Attention-Deficit/ Hyperactivity Disorder using in vivo chronoamperometry and behavioural responses to methylphenidate and guanfacine
Attention-Deficit/Hyperactivity Disorder (ADHD) is a childhood disorder that is behaviorally characterized by developmentally inappropriate levels of inattention, impulsivity and hyperactivity. Among several hypotheses of ADHD etiology the prevailing hypothesis implicates a hypodopaminergic system …
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Molekulių įspaudų technologijos taikymas melamino jutikliuose /
… study, various electrochemical methods such as chronoamperometry, differential pulse voltammetry, and cyclic voltammetry were used to collect and interpret the data, and the Randles-Sevcik equations were applied to calculate the active surface area of the electrode. To improve the …
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The use of cyclodextrin template-based metal oxide nanomaterials in the development of electrochemical sensors for phenolic endocrine disruptor compounds
… electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA). The TEM shows that the surface morphology has no difference between nanoparticles prepared in the presence and absence of beta-cyclodextrin β-CD), amorphous particles with high surface area and dimensions of about 100 nm by …
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Methodology for determining electronic transference numbers in molten sulfide melts
… The first method is a stepped potential chronoamperometry method, in which the electronic transference number is determined from the decay of the current after a voltage step. The second method is a faradaic efficiency method, where the ionic transference number is determined from the …
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Electrochemical studies of carbon monoxide oxidation on platinum and platinum based fuel cell catalysts
… CO. Cyclic voltammetry and potential step chronoamperometry measurements performed on the bulk polycrystalline Pt, Pt(111), Pt(s)-[4(111) x (100)] ß Pt(335) and Pt(s)-[6(111) x (100)] ß Pt(557) electrodes in 0.1 M HClO4 and 0.1 M H2SO4 electrolyte solutions showed the consistent trend of …
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Electrochemical Oxidation of Carbon Monoxide in Reformate Hydrogen for PEM Fuel Cells
… by employing cyclic voltammetry and chronoamperometry techniques. A fixed bed adsorber model was used to characterize the adsorption part of the filtering. The model was validated by demonstrating as a filter cell. The performance was compared with other CO removing techniques.</p>
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Direct methanol fuel cell catalysts with controllable interface
… were measured by voltammetry and chronoamperometry in laboratory half cells simulating the room temperature operation of a direct methanol fuel cell (DMFC) anode under acidic conditions.
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In Situ Studies of Surface Electric Field on Cobalt Oxide Electrode Surfaces with Second Harmonic Generation (SHG)
… impedance measurement (EIS), in situ Raman, and chronoamperometry were also applied to the sample, for the explanation of electrochemical and physical properties. This work provides new methods for calculating the surface electric field, and proposes new assumptions for EFISH signal generation, …
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Exoelectrogenic biofilm growth in shearing flows
… first time that mass transport limiting current, chronoamperometry, and cyclic voltammetry in a rotating disk electrode are ideal for studying adhesion of microbes to metallic surfaces under shear. We study the adhesion of Escherichia coli, Bacillus subtilis, and 1 μm silica microspheres over a …
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Electrocatalytic CO2 Reduction by Self-Assembled Monolayers of Metal Porphyrins
… systems is studied using cyclic voltammetry and chronoamperometry, and products are quantified through NMR and GC techniques. Additionally, AFM is used to characterize the morphology of the electrode surfaces. Experiments show that CO2 reduction is highly sensitive to the surrounding environment …
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ΜΕΛΕΤΗ ΤΟΥ ΜΗΧΑΝΙΣΜΟΥ ΤΗΣ ΗΛΕΚΤΡΟΧΗΜΙΚΗΣ ΑΝΑΓΩΓΗΣ ΤΟΥ ΑΛΟΥΜΙΝΙΟΥ ΑΠΟ ΤΗΓΜΑΤΑ ΧΛΩΡΙΟΥΧΩΝ ΚΑΙ ΧΛΩΡΟΦΘΟΡΙΟΥΧΩΝ ΑΛΑΤΩΝ ΣΤΟΥΣ 450 C
… LINEAR SWEEP VOLTAMMETRY, CHRONOPOTENTIOMETRYAND CHRONOAMPEROMETRY, AS WELL AS THE CONVOLUTIONAL ANALYSIS, WERE USED. MOREOVER A SIMPLE ANALYTICAL METHOD PERMITTING THE SOLUTION OF THE SYSTEM OF THE EQUATIONS WHICH DESCRIBE A REVERSIBLE, DIFFUSION CONTROLLED ELECTROCHEMICAL PROCESS, WAS DEVELOPED. …
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A low-cost, handheld potentiostat device capable of high-resolution measurements and IOT connectivity
… (PalmSens4) in Cyclic Voltammetry (CV), chronoamperometry (CA), Square Wave Voltammetry (SWV), and Open Circuit Potential (OCP) measurements. Both devices were connected to standard glossy carbon Screen-Printed Electrodes (SPEs) that were immersed in a solution of ferri/ferrocyanide and …
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Atomic layer deposition and electrochemical characterization of TiO2 as a potential candidate for a photoanode protective layer
… the techniques of cyclic voltammetry and chronoamperometry to evaluate electrochemical performance. Electron microscopy SEM was carried out, before and after the anodes underwent electrochemical testing, to gain insight into any surface degradation and morphological changes of the TiO2 and …
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Multimetallic Nanoparticles For Fuel Cell Electrocatalysts: Considerations Of Their Formation And Thin-Film Inspired Compositions
… formation. Single- and double-potential step chronoamperometry methods are also used to investigate the first step of this synthesis- the rates at which the metal precursors are reduced and dissociate in solution. Under the assumptions of the electroanalytical measurements, the coreduced …
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Development of a Nano-Composite Coating Technology for Improvement of Carbon Steel Pipe to Erosion-Corrosion in Oil Sands Slurry
… substrate was determined by cyclic voltammetry, chronoamperometry current transient measurements and atomic force microscopy (AFM) characterization. A mixed instantaneous and progressive mechanism is followed during electrodeposition under low cathodic overpotentials. At high overpotentials, it …
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Strategies to enhance extracellular electron transfer rates in wild-type cyanobacterium Synechococcus elongatus PCC7942 for photo-bioelectricity generation
… using cyclic voltammetry. Double step potential chronoamperometry was also successfully tested in the biofilms. Thus, the electrochemical characterisation of S. elongatus PCC7942 was demonstrated, implying that the strategies presented in this thesis could be used to screen for cyanobacteria …
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Electrochemical materials and microfabrication for sensor devices
… techniques, including cyclic voltammetry (CV), chronoamperometry (CA), and material characterisation methods, confirmed the sensor platforms’ effectiveness and sensitivity, underscoring the potential of NPC MDA-based sensors for real-world applications. This work establishes NPC microelectrodes …
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The Electrochemistry of Corrosion Inhibitors in the Oil and Gas Industry
… steel substrate which was identifiable through chronoamperometry as transient occurrences of noise. The mechanism leading to this is suggested to be violent microscopic ruptures of an overlying polymeric film that exposes regions of the underlying steel surface to corrosive attack. This polymer …
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Fundamental studies on electrochemical production of dendrite-free aluminum and titanium-aluminum alloys
… was deposited with current efficiency of 84-99%. Chronoamperometry study was conducted using AlCl_3 -EMIC and AlCl_3 -1-Butyl-3-methyl-imidazolium chloride (BMIC) (MR = 1.65:1) at 90ºC to understand the mechanism of aluminum electrodeposition and find out diffusion parameter of electroactive …
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Nanoparticle-based electrochemical sensors for the detection of lactate and hydrogen peroxide
… of the sensors was studied in human serum. The chronoamperometry results showed that the PdCu/SPCE sensors yielded a high sensitivity (396.7 µA mM -1 cm-2), a wide linear range (0.5 -11 mM), and a low limit of detection (0.7 µM) at the applied potential of -0.3 V. For PdAg/rGO sensors, a high …
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